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EMI CATALOG

Product catalog summary

About Laird Technologies
Laird Technologies is a global leader in designing and manufacturing customized products for wireless and advanced electronics applications. Their expertise includes electromagnetic interference (EMI) shielding, thermal management, specialty metals, signal integrity components, and wireless antenna solutions, serving industries such as aerospace, defense, telecommunications, medical equipment, consumer electronics, and automotive electronics.

EMI Introduction
Electromagnetic interference (EMI) affects electronic equipment, necessitating compliance with regulations from organizations like the FCC and the European Union to prevent interference with public broadcast services. EMI control is crucial in military and medical applications.

EMC Design of High-Speed Systems
Designing systems to meet emission and immunity requirements involves suppression, isolation, and desensitization. Techniques include operating at slower speeds, minimizing loop areas, and using suppression components to reduce EMI in printed circuit boards (PCBs).

Design Approaches
Reducing EMI emissions can be achieved by slowing circuit speeds and using shielding. Shielding is effective for emission suppression and immunity without affecting system speed or reliability. A combination of circuit suppression and shielding is often cost-effective.

Product Highlights
Laird Technologies offers a range of EMI shielding products, including fabric-over-foam gaskets, fingerstock, board-level shields, vent panels, and conductive elastomers, designed for various applications and providing high shielding effectiveness and design flexibility.

Key Features and Benefits
- High shielding effectiveness over a broad frequency range.
- Versatile mounting options and custom shapes.
- Flame retardant and high conductivity products.
- Suitable for low pressure force and high abrasion resistance applications.
- Available in various sizes and shapes.

Conclusion
Laird Technologies provides comprehensive EMI shielding solutions, focusing on research and development to deliver innovative and effective products for diverse industries and applications.

Overview: The document provides a comprehensive guide on board level shields (BLS) used in electronic components, focusing on materials, design specifications, and applications. It highlights the different types of shields, their features, benefits, and the materials used in their construction.

Materials and Specifications: The document lists various materials used for BLS, including CRS (Tin Plated), Nickel Silver, Stainless Steel, and Copper Alloys. Each material is described in terms of its properties, such as permeability, solderability, and environmental performance. The document also discusses the cost and application suitability of each material.

Design and Features: The document outlines the design parameters for both one-piece and two-piece BLS. One-piece designs offer economical shielding with no tooling costs, while two-piece designs allow for easy inspection and repair without risking board damage. The document also introduces patented designs like EZ Peel and ReCovr, which offer unique features such as easy cover removal and improved rigidity.

Applications: The shields are applicable in various industries, including computing, telecommunications, automotive, consumer electronics, aerospace, and medical sectors. The document emphasizes the importance of selecting the right shield design to optimize performance and reduce costs.

Performance and Testing: The document provides typical properties and performance results for standard BLS, including co-planarity, solderability, and mechanical shock resistance. It also details the testing methods used to ensure the reliability and effectiveness of the shields.

Conclusion: Laird Technologies offers a range of BLS solutions designed to meet specific application needs. Their expertise in material selection and design ensures that the shields not only perform effectively but also enhance the overall application.

Introduction
The document discusses the challenges of designing electronic components with effective EMI shielding while balancing space, weight, and production constraints. Laird Technologies offers expertise in board-level shielding from design to production, ensuring quality and performance through proprietary processes.

Specifications and Materials
The document specifies pull force requirements and dimensions for various components. It highlights the use of materials like Shield-LiteTM, CRS 1008/1010, beryllium copper alloys, and others for shielding purposes. The document also details the thickness and properties of these materials.

Shield Designs
One-Piece Shield Design: Provides economical shielding with six sides of protection, suitable where component access is not needed.
Two-Piece Shield Design: Allows easy inspection and repair of components, featuring snap-on covers and grounding dimples for electrical grounding and mechanical retention.

Board Level Shields
Drawn board level shields are designed to prevent EMI leakage at high frequencies by eliminating apertures in corners. They are available in various materials and can be combined with other shielding solutions for comprehensive protection.

Multi-Compartmental Shield Design
These shields save PCB space and production time by featuring internal dividing walls and meeting various international standards. They are available in assembled or unassembled forms.

Fingerstock and Mounting Methods
Laird Technologies offers a range of fingerstock solutions for EMI shielding, with various mounting methods including rivet, slot, adhesive, clip-on, and tape track mounting. Each method is designed to ensure secure and effective installation.

Conclusion
The document emphasizes Laird Technologies' capabilities in providing custom and standard EMI shielding solutions, with a focus on quality, performance, and cost-effectiveness.

Ordering Information:
- The part number format for Laird Technologies products includes specific prefixes for different product types. For example, UltraSoft items use prefixes 0098 or 0078, while stainless steel items use 0095. Coil orders require a prefix of 0C.
- Standard plating finishes are specified, with gold plating having a minimum thickness of 0.00005 inches. Custom finishes can be requested.
- Modifications to standard parts are indicated by an 'X' for quoting purposes, with a specific part number assigned upon ordering.
- Adhesive mounting options are available under the Sticky Fingers® brand.

Plating Finishes:
- Various plating finishes are available for fingerstock products, including unplated, gold, silver, cadmium, tin lead, nickel, and zinc. Each finish has specific ASTM or SAE standards and thickness requirements.
- Non-standard plating requirements must be clearly identified on production prints.

UltraSoft® Series:
- Designed for EMI compliance and lightweight enclosure designs, UltraSoft fingers offer low compression forces and a wide selection of sizes and configurations.
- They provide shielding effectiveness comparable to standard 97-Series parts and are available in the same lengths and finishes.

Recyclable Clean Copper (RCC):
- RCC is a beryllium-free alternative to traditional copper alloys, offering excellent corrosion resistance, platability, solderability, and stress relaxation properties.
- It is compliant with EU Directive 2002/95/EC and is suitable for high-volume designs.
- RCC products are flameproof and available in custom stampings.

Slot Mount Series:
- This series is designed for slotted applications, offering economical grounding and shielding solutions without the need for fasteners or adhesives.
- It features bi-directional wiping and compression action, suitable for various electronic enclosure applications.
- Available in standard and UltraSoft® versions, with a choice of finishes.

Technical Specifications:
- Detailed dimensions and specifications for various series are provided, including material thickness, slot length, and recommended mounting hole patterns.
- The document includes tables with measurements in inches and millimeters for different series and configurations.

Overview: The document provides technical specifications and descriptions for various series of EMI shielding products offered by Laird Technologies. These products are designed for use in electronic enclosures and applications requiring electromagnetic interference (EMI) shielding.

Specifications: The document lists detailed dimensions for different series of products, including the Dual Slot Series and Variable Slot Mount Series. Dimensions are provided in both inches and millimeters, and specific part numbers are associated with each set of dimensions.

Product Features: The products feature an alternating slot/cut design to enhance gasket strength and flexibility, allowing them to be folded without damage. They are available in various plating finishes to meet galvanic compatibility requirements and are offered in standard and UltraSoft™ low compression versions.

Applications: These shielding products are suitable for a wide range of applications, including front panel handles, plug-in units, subrack assemblies, chassis covers, and backplanes. The Compact PCI gasket is specifically designed for IEEE standard 1101.10 card cages, providing shielding between front panels on sub racks and plug-in units.

Installation and Customization: The Variable Slot Mount shielding eliminates the need for long slots and can be customized to any patterned series of slots. It offers easy installation without fasteners or adhesives and is ideal for grounding applications. The Sticky Fingers series features adhesive-mounted beryllium copper shielding strips for easy and secure mounting.

Performance: The document includes graphs showing compression/deflection performance for specific part numbers, indicating the load capacity and deflection percentage.

Overview: The document discusses the features and applications of Dard beryllium copper contact gaskets, which are designed for RFI/EMI shielding in electronic shielded rooms, trailers, computers, and communication equipment. These gaskets are suitable for both wiping closures and compression applications, offering high endurance and deflection range.

Specifications: The gaskets provide attenuation up to 112 dB for a 100 MHz plane wave. They are available in continuous lengths up to 25.0 ft (7.6 m) and come in various standard finishes. The 97-Series products are also available in an UltraSoft® low compression force 98-Series.

Installation: Fastening is typically done using screws or rivets, with soldering as an optional method. Quick spring clip fasteners (97-445) are designed for use with Series 97-436 finger gaskets, allowing full strip compression and easy installation.

Product Variants: The document details several series, including the 97-438 and 97-440, which are mechanically balanced for high deflection and long endurance. The Sticky Fingers® version features a U-shaped end for sliding and retaining the strip's fingers, providing shielding effectiveness of >115 dB for a 100 MHz plane wave.

Dimensions and Models: Various models are available with different dimensions to suit specific applications. The document includes detailed tables with measurements in inches and millimeters for each model.

Applications: These gaskets are ideal for environments requiring continuous shielding that conforms to irregular shapes and tight radius corners. They are available in standard lengths and continuous coils, with options for different finishes.

Overview: The document provides technical specifications and descriptions of various shielding and grounding products, primarily focusing on beryllium copper contact strips and gaskets designed for electronic applications. These products are part of the Clip-On Twist Series and other related series, offering solutions for effective electromagnetic interference (EMI) shielding.

Specifications: The document lists detailed dimensions and configurations for different product models, including lengths, widths, and other critical measurements in both inches and millimeters. The products are designed to provide high shielding effectiveness, often exceeding 115 dB for a 100 MHz plane wave.

Product Features: The Clip-On Twist Series combines scientific twist design with clip-on mounting for easy installation and secure retention. These gaskets are available in various widths and configurations, including options with Poron® rubber for environmental resistance and "D" Lance for added mounting strength.

Applications: These products are ideal for general shielding applications where space is limited. They are suitable for use in electronic enclosures, panel divider bars, and other areas requiring effective EMI shielding and grounding.

Additional Products: The document also mentions the Divider Edge Shield and Card Guide Clip-On, which offer unique features such as low compression force, bi-directional sliding contact, and compatibility with various board thicknesses. These products are designed to accommodate industry trends towards miniaturization and reduced compression forces.

Performance Data: Shielding effectiveness and load/deflection data are provided for various models, indicating their performance in different frequency ranges and compression scenarios.

Conclusion: The document highlights the versatility and effectiveness of Laird Technologies' shielding and grounding products, emphasizing their suitability for a wide range of electronic applications. The products are available in standard lengths and can be customized to meet specific requirements.

Product Specifications:
The Twist Series consists of adhesive-mounted beryllium copper contact strips designed for electronic shielding applications. These strips are available in 24-inch lengths and, except for Series 97-551 and 97-558, also in 25-foot coils. The strips offer shielding effectiveness greater than 100 dB for a 100 MHz plane wave, with some models achieving over 115 dB. Right angle configurations are not available in coils.

Combination Environmental Rubber Gasket:
Series 97-556 and 97-561 incorporate a Poron® rubber gasket for enhanced protection against dust and moisture. These are available in various finishes and are also offered in the UltraSoft® low compression force 98-Series.

Technical Dimensions:
The document provides detailed dimensions for each series, including parameters such as pitch, slot, length, and coil availability. All dimensions are specified in inches and millimeters.

Clip-On Perpendicular Shielding:
This product features a clip-on design suitable for high-temperature environments where adhesive-mounted gasketing is not feasible. It offers shielding effectiveness of over 80 dB for a 10 MHz plane wave and is available in various plating finishes.

Divider Edge Shield:
Designed for miniaturization trends, this product is applied to the top edge of multi-compartmental castings. It features a unique finger design for low compression force and excellent shielding and grounding properties. Available in standard 12-inch lengths, with longer lengths upon request.

Introduction
Laird Technologies introduces a range of grounding and shielding products designed for various applications, focusing on ease of installation, effective grounding, and compatibility with miniaturization trends in the industry.

Card Guide Clip-On
The Card Guide Clip-On provides excellent grounding contact from the PC board to a card guide on a rack. It features a unique snap-in contact finger that prevents snagging and allows bi-directional sliding contact. It is designed for board thicknesses of 0.085 in. to 0.100 in. (2.159 mm to 2.540 mm) and can be plated with various finishes for galvanic compatibility. The product is ideal for grounding applications and offers low compression forces for easy installation.

Divider Edge Shield
This product is designed for multi-compartmental castings with wall thicknesses from 0.035 in. (0.889 mm) to 0.055 in. (1.397 mm). It features a clip-on design for easy installation and secure retention, providing excellent shielding and grounding properties. It is available in standard lengths of 12.000 in. (304.800 mm) and can be cut to desired lengths.

Clip-On Longitudinal Grounding Strip
This strip combines finger compression with longitudinal motion, ideal for rack-mounted and sliding door assemblies. It offers bi-directional wiping and is available in various plating finishes. The product is supplied in standard lengths of 17.000 in. (431.800 mm) and is available in an UltraSoft® low compression version.

Mini-Longitudinal Grounding Gasket
Designed for small applications requiring lower compression forces, this gasket allows longitudinal sliding motion and is ideal for rack-mounted assemblies. It features a miniaturized design with narrow width and low standing height, available in various plated finishes.

UltraSoft® Series
The UltraSoft® series offers the lowest compression forces in the industry, increased life cycle, and shielding effectiveness comparable to standard parts. These products are available in the same lengths as standard products and offer a wide selection of sizes and configurations.

Conclusion
Laird Technologies provides a comprehensive range of grounding and shielding solutions that cater to the needs of modern electronic systems, emphasizing ease of installation, effective grounding, and adaptability to industry trends.

Overview: The document provides detailed specifications and guidelines for various grounding and shielding products, including Mini-Longitudinal Grounding Gaskets, Clip-On Longitudinal Grounding Strips, and contact strips. These components are used in high-frequency equipment for grounding and shielding purposes.

Specifications:

Products are available in a variety of plating finishes and standard lengths, with specific dimensions provided in both inches and millimeters.
UltraSoft® low compression versions are available for certain products, offering reduced compression forces.

Product Features:

Mini-Longitudinal Grounding Gasket: Designed for small applications requiring lower compression forces, allowing longitudinal sliding motion. Suitable for rack-mounted, sliding door, or side panel assemblies.
Clip-On Longitudinal Grounding Strip: Combines finger compression with longitudinal motion, ideal for rack-mounted and sliding assemblies. Features clip-on mounting for easy installation and bi-directional engagement.

Impedance vs. Frequency: Graphs are provided to illustrate the relationship between impedance and frequency for different products, highlighting their performance across a range of frequencies from 10K Hz to 1G Hz.

Contact Strips:

Used for grounding and shielding in high-frequency equipment, available in various lengths, widths, and configurations.
Made from beryllium copper, offering flexibility in design and application.

Additional Information:

Dimensions are provided for each product, with detailed diagrams illustrating specific measurements and configurations.
Standard finishes and load/deflection data are referenced for further details.

Overview: The document provides technical specifications and descriptions of various connector gaskets and shielding solutions offered by Laird Technologies. These products are designed to enhance grounding and electromagnetic interference (EMI) shielding in electronic systems.

DIN Connector Gasket Series: Manufactured from beryllium copper, these gaskets are designed to ground connector plugs to electronic system chassis. They offer excellent conductivity and shielding, are available in two sizes, and feature a wide footprint to accommodate misalignment. The slide-on design facilitates easy assembly.

USB Type B Connector Gasket: This gasket snaps onto connectors before PCB placement, fitting all Series B USB right-angle connectors. Made from high-performance beryllium copper, it provides superior grounding and shielding. The compact design fits within specified dimensions and is available in various finishes.

Fiber Optic Shielding: Designed for 1 x 9 style fiber optic transceivers with duplex SC connectors, this shielding provides EMI protection around faceplate apertures. It fits most Tyco and Methode guide rails and requires no extra mounting holes or soldering. Made from stainless steel, it offers high galvanic compatibility.

GBIC Fiber Optic Shield: This shield reduces emissions from GBIC transceivers by conducting interference away from the transceiver. It features a spring finger design for grounding and is easily assembled by snapping onto guide rails.

D Connector Shielding: Available in stainless steel and beryllium copper, these shields fit 9 to 68 pin connectors. They feature a 20-degree angle flange for continuous contact and increased shielding effectiveness. Custom shapes and designs are available.

Precision Stamped Metals: Laird Technologies offers a range of standard precision electronic contacts for grounding and interconnecting boards and devices. These contacts are available in various materials and platings, with options for customization to meet specific needs.

Overview: The document provides technical specifications and guidelines for metal surface compatibility, particularly focusing on corrosion prevention in various environments. It also details Laird Technologies' EMI shielding solutions, including vent panels and filtration panels, designed for electronic enclosures.

Metal Surface Compatibility:

Metals in contact should be no more than one level apart on the anodic index chart to minimize corrosion in harsh environments.
For normal environments, the voltage difference between dissimilar metals should not exceed 0.25 volts.
In controlled office environments, a difference of up to 0.5 volts is acceptable.
General guidelines are provided, but specific compatibility should be confirmed with experts.

EMI Shielding Solutions:

Vent Panels: Laird Technologies offers a variety of vent panels to meet EMI, environmental, and mechanical requirements. The MaxAir vent panel line provides increased airflow and EMI protection, utilizing a frameless design for ease of installation and greater durability.
Electro-Air EMI/Dust Filtration Panel: Designed for air filtration and EMI shielding, these panels capture airborne contaminants while minimizing airflow impedance. They offer extensive service life and are easy to maintain.
ElectroVent Panels: These panels provide EMI shielding with a choice of materials and platings, suitable for various environmental and space considerations.

Key Features and Benefits:

MaxAir panels increase usable airflow area by 10% to 20% compared to traditional aluminum panels.
Electro-Air panels provide shielding effectiveness in excess of 60 dB for a range of 18 MHz to 1 GHz.
ElectroVent panels offer a wide choice of materials and finishes to meet diverse shielding requirements.

Applications:

Telecommunications hardware equipment, fans, military applications, server racks, and shielded rooms.

Overview: This document provides detailed information on Laird Technologies' Fabric-Over-Foam EMI shielding gaskets. It includes specifications, benefits, and application guidelines for various gasket profiles and materials.

Specifications: The document lists various types of fabric and foam materials used in the gaskets, such as Ripstop, Taffeta, and Knit Mesh, each with specific metal coatings like Nickel/Copper (Ni/Cu) for conductivity. The gaskets are designed for different applications, offering benefits like flame retardancy, abrasion resistance, and high shielding effectiveness.

Material Properties: The gaskets are available with different core materials, including urethane, which provides low compression set and long-term reliability. They are also available with pressure-sensitive adhesive (PSA) tapes for easy attachment.

Performance and Benefits: The gaskets offer shielding effectiveness of over 100 dB across a wide frequency spectrum. They have low surface resistivity and are available in flame retardant versions compliant with UL94 V0 and UL94 HB standards. The gaskets are also RoHS compliant and halogen-free.

Applications: These gaskets are suitable for use in computer servers, desktop computers, digital cameras, medical equipment, and telecommunications enclosures, among others.

Agency Approvals: The gaskets have UL designation V0 041 and are listed under UL file #OCDT2.E170327.

Profile Selection Guide: The document provides a detailed guide for selecting gasket profiles based on dimensions and specific application needs. It includes a numbering key for identifying part-specific attributes and configurations.

Conclusion: Laird Technologies offers a comprehensive range of EMI shielding gaskets with customizable options to meet specific engineering requirements. The document emphasizes the company's commitment to innovation and regulatory compliance.

Specifications:
The document provides detailed specifications for various electronic components, including conductive gaskets and elastomer materials. It lists part numbers, dimensions, and material types such as beryllium copper, Monel, and tin-plated copper clad steel. The specifications include tolerance ranges for different sizes and materials.

Procedures:
Instructions for ordering components are provided, emphasizing the need to confirm availability and lead times with the sales department. The document also includes guidelines for replacing suffixes in part numbers to indicate different material compositions.

Standards and Norms:
The document references ASTM and MIL standards for materials, such as ASTM B 197 for beryllium copper and MIL-R-6130 for neoprene sponge. Temperature ranges for elastomer types are specified, ensuring compliance with industry standards.

Recommendations:
Recommendations are given for selecting appropriate materials based on application needs, such as temperature resistance and conductivity. The document suggests replacing suffixes in part numbers to customize material properties.

Data Summary:
Tables in the document provide dimensions and tolerances for various components, including groove dimensions and elastomer tubing diameters. Key data points include width, height, and diameter measurements in both inches and millimeters.

Critical Information:
Key requirements include adherence to specified tolerances and material standards. Limitations are noted for certain materials, such as availability in specific configurations. Best practices involve selecting materials based on environmental conditions and application requirements.

Overview: The document provides detailed specifications and guidelines for various ElectroGround washers and ElectroMesh tapes used for EMI shielding and grounding applications. It includes dimensions, materials, tolerances, and application instructions.

Specifications: The document lists part numbers with corresponding outer diameter (O.D.), inner diameter (I.D.), and maximum thickness (T) for ElectroGround washers. Dimensions are provided in both inches and millimeters.

Materials: Various materials are specified for the washers, including Beryllium Copper, Monel, Aluminum, Tin Plated Steel, and Stainless Steel. Each material has a specific code used in part numbers.

Tolerances: Tolerances for dimensions are provided, varying based on the size range of the washers. These tolerances ensure precision in manufacturing and application.

Procedures: Instructions on how to specify the correct washer for an application are included. This involves selecting dimensions from a table, choosing the material, and assembling the full part number.

ElectroMesh Tape: The document describes ElectroMesh tape, which is used for EMI shielding and grounding. It is made from tin-plated copper-clad steel and is available in rolls. The tape is flexible, allowing it to conform to irregular surfaces.

Applications: The document highlights the use of these products in various applications, including cable assemblies, architectural shielding, and electronic enclosures. The conductive fabric section describes materials used for EMI/RFI and ESD protection.

Key Features: The ElectroMesh tape offers excellent solderability, strength, and performance. It is available in different alloys and wire dimensions, providing versatility for different applications.

Overview: The document provides detailed specifications and applications for various EMI/RFI shielding materials developed by Laird Technologies. These materials are designed to offer excellent surface conductivity, shielding effectiveness, and corrosion resistance, suitable for a wide range of applications including enclosures, gaskets, tapes, and grounding.

Product Specifications: The document lists several products, each combining highly conductive copper and corrosion-resistant nickel with different substrates like polyester taffeta, mesh, nylon ripstop, and nonwoven materials. Key properties include UL94 V0 flammability ratings, surface resistivity, shielding effectiveness, tensile strength, and weight. These materials are used in environments requiring protection against electromagnetic interference (EMI) and radio frequency interference (RFI).

Flectron Metallized Fabrics: Flectron fabrics are highlighted for their flexibility, conformability, and breathability, combined with the electrical properties of metals. They are used in architectural shielding and as materials in EMI gaskets, tapes, and shield laminates.

MRI "A" Fabric: This product is specifically designed for MRI shielding, offering superior shielding effectiveness across the MRI frequency range. It is lightweight, corrosion-resistant, and easy to install, reducing construction time for MRI facilities.

Conductive Tapes: Laird Technologies' conductive fabric shielding tapes provide high conductivity and shielding effectiveness, with advantages such as UL510 flame rating, flexibility, durability, and easy processing. They are used in applications requiring dynamic flex and high conformability.

Electrically Conductive Elastomers: These elastomers are used for EMI sealing and environmental sealing, available in various forms such as gaskets, molded shapes, and extruded profiles. They provide a conductive and resilient solution for sealing electronic enclosures.

Case Study: A case study is presented for a telecommunication customer requiring a gasket for an RRU chassis. The selection process involves choosing the appropriate elastomer base and filler system to meet the shielding and environmental requirements.

Tables and Data: The document includes tables detailing product specifications, material properties, and performance characteristics, providing a comprehensive guide for selecting the appropriate shielding material for specific applications.

Overview: This document provides detailed technical specifications and guidelines for Laird Technologies' Electroseal Conductive Elastomer products, which are used for EMI shielding and environmental sealing in both military and commercial applications. The document includes information on material properties, performance under various conditions, and manufacturing processes.

Material Specifications: The document outlines various fillers and elastomers used in the products, such as Ni/graphite, silver/copper, and silicone. It provides detailed electrical properties like volume resistivity and shielding effectiveness, as well as physical properties including density, hardness, tensile strength, and elongation.

Performance Under Conditions: The document evaluates the performance of materials under different conditions such as exposure to acids, bases, esters/ketones, and decontaminating fluids. It also assesses performance at low and high temperatures, compression set, and radiation resistance.

Metal Substrate Compatibility: The document discusses the compatibility of the elastomers with various metal substrates, indicating acceptable levels of weight loss in different environments.

Manufacturing Processes: The document describes the manufacturing processes available for these elastomers, including molded sheets, die-cut parts, molded shapes, O-rings, and extruded profiles. It also provides part numbers and dimensions for various product configurations.

Application Guidelines: The document provides guidelines on how to specify and order the products, including selecting the desired configuration, dimensions, and material type. It also includes part numbers for specific product dimensions and configurations.

Conclusion: Laird Technologies offers a comprehensive range of conductive elastomer products designed to meet diverse application needs, with detailed specifications ensuring optimal performance in various environments.

Introduction
This document provides detailed information on EMI shielding materials and technologies offered by Laird Technologies. It covers various products such as oriented wire gaskets, die-cut gaskets, impregnated woven wire, and expanded metal gaskets, as well as form-in-place gasket technologies.

Specifications
The document outlines specifications for different materials used in EMI shielding, including silicone-based oriented wire composites, which can withstand temperatures from –70°F to 500°F. Material specifications for standard sheets and strips are provided, with dimensions and material codes detailed in tables.

Material Compounds
Compound 98 is a silicone material filled with Ag/Cu and expanded metal. The document includes a chart for material compounds used in rectangular waveguide gaskets.

ElectroMet Oriented Wire
These gaskets are composites for EMI shielding and sealing, using Monel® or aluminum wires embedded in elastomers. They are available in sheet or strip form with a minimum thickness of 0.032 inches.

Die-Cut Gaskets
Oriented wire can be supplied as die-cut gaskets in various configurations, suitable for cable connectors and Sub-D connectors.

ElectroMet Impregnated Materials
These include woven wire and expanded metal gaskets, providing EMI shielding through woven aluminum mesh or expanded metals, with pressure sealing by neoprene or silicone elastomer.

Material Selection Guide
The document provides a guide for selecting materials based on characteristics such as shielding effectiveness, seal, drip proof, and resistance to various conditions.

ElectroCoat
This is a thin, flexible surface coating consisting of a silver-filled silicone elastomer, offering excellent shielding effectiveness and a wide compression range.

Form-In-Place Gasket Technologies
This section describes an automated system for dispensing conductive elastomer EMI shielding and grounding gaskets onto substrates. It highlights features such as cost savings, high shielding effectiveness, and compatibility with various substrates.

Tables and Data
The document includes numerous tables detailing material specifications, dimensions, and tolerances for various products, as well as guidelines for ordering and specifying products.

Overview: This document serves as a comprehensive guide on the selection and application of microwave absorbers, specifically focusing on Laird Technologies' Q-Zorb and RF Foam products. These absorbers are crucial for reducing electromagnetic interference (EMI) in various applications, including military and commercial electronics.

Specifications:

Q-Zorb 2000: Available in thicknesses from 0.020” to 0.125”, suitable for frequencies >10 GHz to <4 GHz. Thicker materials are better for lower frequencies.
Q-Zorb 3000: Designed for frequencies <2 GHz, available in thicknesses of 0.006” and 0.020”.
RF Foam 4000 and 5000: Used for reflection and insertion loss, available in thicknesses from 0.125” to 0.50”.

Applications:

Magnetic Absorbers: Thin polymeric materials filled with magnetic particles, effective for high-frequency EMI reduction.
Foam Absorbers: Open-celled foam with carbon coating, used for broadband EMI attenuation and air filtration.

Design Considerations:

Magnetic absorbers are preferred for applications with magnetic field-dominated currents, while foam absorbers are cost-effective but may degrade over time.
Surface wave absorbers are recommended for cavity noise suppression due to their performance at high angles of incidence.

Product Features:

Q-Zorb HF: High-frequency surface wave absorbers, available in various thicknesses and compliant with UL V0 and RoHS standards.
Q-Zorb HP: High permeability absorbers for low-frequency applications, flexible and available with adhesive backing.
RFRET 4000: Reticulated foam absorbers for broadband reflectivity reduction, suitable for outdoor use.

Modeling and Testing: Laird Technologies provides modeling support using software like HFSS and Microwave Studio, allowing for detailed analysis of absorber performance in various applications.

Sample Kits: Available to assist engineers in evaluating different absorber types and thicknesses for specific EMI challenges.

Product Overview: The document describes a series of single-layer "lossy" sheets made by dipping lightweight open-celled urethane foam into a resistive solution. These sheets are used as microwave absorbers, offering low-cost solutions with specified insertion loss at given frequencies. The sheets are available in thicknesses ranging from 0.125" to 1.5" and standard sizes of 24" x 24", with custom sizes available. They are measured for insertion loss over a 2 to 18 GHz frequency range, typically specified at 3 or 10 GHz. The material can be die-cut and supplied with pressure-sensitive adhesive for easy application.

Applications: RFLS sheets are used to reduce noise or cavity Q's in microwave components such as amplifiers, oscillators, computer housings, and wireless equipment.

Product Specifications: The document lists part numbers, sizes, thicknesses, temperature ranges, colors, and environmental bonding details for different products. For example, Part No. 5092 is a 24” x 24” sheet with a 0.25” nominal thickness, suitable for temperatures from -85 to 250°F, and is RoHS compliant.

Performance and Testing: The document includes a graph showing typical insertion loss performance across frequencies from 2 to 18 GHz. Laird Technologies uses various testing methods, including a network analyzer and reflectivity arch, to measure the electrical properties of absorber materials.

Advanced Solutions: Laird Technologies is developing thermally conductive microwave absorbing materials, such as COOL-ZORB, which serve as thermal pads between chips and heatsinks. They also offer analytical software, VBROP, for optimizing multi-layered stacks for reflection or maximum transmission at specified frequencies.

Disclaimer: The document includes a disclaimer stating that all specifications are subject to change without notice and that Laird Technologies is not liable for incidental or consequential damages. It emphasizes that the responsibility for the use and application of materials rests with the end user.

Catalog excerpts

ABOUT LAIRD TECHNOLOGIES Laird Technologies designs and manufactures customized, performance-critical products for wireless and other advanced electronics applications. The company is a global market leader in the design and supply of electromagnetic interference (EMI) shielding, thermal management products, specialty metals, signal integrity components, and wireless antennae solutions, as well as radio frequency (RF) modules and systems. Laird Technologies is the world leader in the design and manufacture of customized, performance-critical products for wireless and other advanced electronics...

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BOARD LEVEL SHIELDS 6 Product Selection Guide 6 Standard Design Shields 9 Product Selection Guide 14 Recyclable Clean Copper 18 Slot Mount Series 19 Dual Slot Series 21 Compact PCI Symmetrical Mount 22 Alternate Slot Series 22 Variable Slot Mount 23 Symmetrical (S3) Slotted Shielding 24 Solid Top (S3) Symmetrical Slotted Shielding 25 Clip-On Symmetrical Shielding 26 Low Profile Hook-On Gasket 31 Large Enclosure Series 32 Double-Sided Contact Series 32 Stainless Steel I/O Shielding 33 Flexible Low Compression Series 34 Clip-On Twist Series 34 Divider Edge Shielding 35 Card Guide Clip-On 36 Clip-On...

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EMI INTRODUCTION Overview of EMC/RFI Issues The phenomenon of electromagnetic interference (EMI) is familiar to virtually everyone, even if they do not understand the underlying principles. Most people have witnessed firsthand the effects of interference. To control EMI, government organizations, such as the FCC, CSA, and EEC, mandate that manufacturers may not design, produce or sell electronic equipment that jams the public broadcast services. In other instances, however, EMI can constitute more than a mere nuisance. The military and medical communities, for example, require trouble-free operation...

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Fabric-Over-Foam and Conductive Foam Wire Mesh • Shielding or grounding of computer and telecommunication equipment seams and apertures • Covers opened infrequently for servicing (6-12 times per year) • Long lasting resiliency is ideal for highly sensitive components in permanent or semi-permanent enclosures • Consistent point-to-point contact for high shielding effectiveness over the life of the gasket • Design flexibility provides grounding and shielding solutions for I/O shielding panels, disk drive insulators, ground planes or circuit boards, electromedical devices, keyboard devices • Mask-and-peel...

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Board-Level Shields • Ideal for high-cycling applications requiring frequent access • Ideal in wiping applications when gasket needs to be engaged from either the top or side • Wide variety of profiles and mounting methods accommodating applications from small handheld devices to room-size enclosures • All applications that require shielding of board- level components • Low height down to 0.04 (1,0) accommodating mother/daughter board configurations • Secure cover design ideal for applications subject to shock and vibration such as mobile military vehicles, commercial aircraft, and wireless electronics...

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Electrically Conductive Elastomers Oriented Wire Microwave Absorbers • Ideal for applications with miniature electrical housings, thin wall construction, and intricate multicomponents (i.e., cell phones, handheld devices, medical instrumentation and equipment) • EMI and environmental sealing applications where flat or groove mounting surface requires a complex molded or extruded shape • Providing both EMI shielding and an environmental seal on cast or machined surfaces • Vulcanized frame configurations can be used with pre-cast housings, vent panels, and computer terminal window frames • Die-cut...

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BOARD LEVEL SHIELDS PRODUCT SELECTION GUIDE Corner Feature Traditional Folded BLS Design Type / Features Rigid Corner Full Drawn w/ Flange Full Drawn Zero Flange Improves Flatness by increasing torsional rigidity Most mechanically rigid, but depth attainable is material and configuration dependent Similar to Full Drawn, Tooling more complex. Key Attributes & Application Consideration SINGLE PIECE Single Piece Simple low cost BLS Solution TWO PIECE Traditional Frame Cover Post Reflow Component Access for inspect, test, cleaning, etc. Various cover retention features available to address rattling,...

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Unique Product Features Mounting Features ReMovl Pick & Place Bridge Easy removal of pick and place bridge for post reflow inspection Thru Hole Loc Pins Size & Shape Pins, Tabs, Etc. Interior Walls Typical Material Thickness Low Height (less than 2 mm) Typical Length & Width Through hole style pin that engages to underside of PCB by mechanical engagement. Cost Position Best Applications Most common BLS solutions Hi Performance BLS solutions (Mechanical & Environmental) BLS Covers, Specialty Military Specialty BLS applications Integrated Spring Contacts

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BOARD LEVEL SHIELDS Whether it’s a one-piece shield, multi-compartmental shield or precision contact, each solution Laird Technologies delivers is designed to provide maximum performance within a minimum timeline. Laird Technologies produces metal electronic components for surface mount applications in a variety of industries. Laird Technologies expertise in a number of key areas ensures that the part provided not only performs, but also optimizes applications. After determining the right board level shield or contact design for an application, Laird Technologies experts use the latest systems...

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BOARD LEVEL SHIELDS STANDARD DESIGN SHIELDS STANDARD SURFACE MOUNT SHIELDS — ONE-PIECE Off the Shelf, On Spec and On Budget Standard surface mount shields are available in both one-piece and two-piece designs. One-piece shields offer six sides of protection, with the sixth side being the board itself. One-piece designs offer economical shielding protection where access to covered components is not necessary. There are no tooling costs associated with either the one and/or two-piece standard design. TYPICAL PROPERTIES AND PERFORMANCE ALL PART NUMBERS TEST METHOD Surface mount solderability 3 Axis...

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EMI CATALOG

EMI CATALOG

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