CHO-FOIL® & CHO-FABTM Shielding Tapes
3Pages

1 US Headquarters TEL +(1) 781-935-4850 FAX +(1) 781-933-4318 • www.chomerics.com Europe TEL +(44) 1628 404000 FAX +(44) 1628 404090 Asia Pacific TEL +(852) 2 428 8008 FAX +(852) 2 423 8253 South America TEL +(55) 11 3917 1099 FAX +(55) 11 3917 0817 Chomerics’ CHO-FOIL tapes are an economical EMI shielding solution for a variety of commercial uses. The tapes are available in copper, aluminum, or tinned copper foil backed with Chomerics’ highly conductive pressure-sensitive adhesive*. Typical properties are shown in Table 1 on the next page, and reliability data appears in Table * Recognized Under the Component Program of Underwriters Laboratories, Inc. CHO-FAB tape is a corrosion resistant nickel-plated cloth coated with Chomerics’ highly conductive pressure-sensitive adhesive*. CHO-FAB tape is extremely strong and lightweight, and has excellent conformability/wrapability to enhance shielding performance and appearance. Use of corrosion resistant nickelplated cloth and Chomerics’ superior metal-particle-filled conductive adhesive technology produces a tape used in a wide variety of EMI shielding and grounding applications. Typical properties are shown in Table 1 on the next page. Ordering Procedure Refer to Tables 2 and 3. All CHOFOIL and CHO-FAB tapes are available in standard 36 yard (32.9 m) rolls or die-cut custom configurations. Call Chomerics’ Applications Engineering Department for assistance with a custom configuration. 4 on page 148. CHO-FOIL copper tape is available with a non-conductive adhesive for applications requiring surface conductivity only. An embossed version of CHO-FOIL copper tape is also available, for a more attractive appearance up to 6 inches (152 mm) wide. Standard length rolls and die-cut custom shapes can be ordered. ¡ Provide a low impedance connection between a braided cable shield and the metal connector backshell in molded cables. An effective EMI shielded assembly can be achieved without soldering the tape to the braid or backshell ¡ EMI radiation measurement troubleshooting, using CHOFOIL tape to shield ventilation slots or seam gaps ¡ Provide electrical continuity in seams of EMI shielded rooms and electronic enclosures ¡ Supply electrical contact to surfaces that can’t be soldered to, such as conductive plastic or aluminum ¡ EMI shield for cables by wrapping the tape around the cable. An overlap is recommended ¡ ESD shielding ¡ Provide corrosion-resistant ground contact points ¡ Fabric tape available where weight and flexibility are important, such as for wrapping cables CHO-FOIL EMI Shielding Tape with Conductive Adhesive (Copper, Aluminum or Tinned Copper) CHO-FAB EMI Shielding Fabric Tape with Conductive Adhesive Typical Applications for CHO-FOIL and CHO-FAB EMI Shielding Tapes LAMINATES & GROUNDING PRODUCTS CHO-FOIL® & CHO-FABTM Shielding Tapes Chofab is available in standard (CFT) and rip-stop (CRS) nylon fabric forms. Both fabrics use nickel / silver plating to provide excellent electrical and corrosion resistance properties.

US Headquarters TEL +(1) 781-935-4850 FAX +(1) 781-933-4318 • www.chomerics.com Europe TEL +(44) 1628 404000 FAX +(44) 1628 404090 Asia Pacific TEL +(852) 2 428 8008 FAX +(852) 2 423 8253 South America TEL +(55) 11 3917 1099 FAX +(55) 11 3917 0817 2 Table 2 TAPE WIDTH CODES (ZZZZ) inch (mm) PART NUMBER TAPE DESCRIPTION CCH – 36 – 101 – ZZZZ Copper foil, conductive adhesive version CCE – 36 – 101 – ZZZZ Copper foil, conductive adhesive, embossed CCJ – 36 – 201 – ZZZZ Aluminum foil, conductive adhesive CCK – 36 – 101 – ZZZZ Tin-plated copper foil, conductive adhesive CCD – 36 – 101 – ZZZZ...

Test Test Method CCH CCE CCJ CCK CCD CAD CFT Initial Taber Abrasion Surface Resistivity (SR) (milliohms) 185°F (85° 250°F (121° 185°F (85° 500 gramweight, CS-10 wheel, 500 cycles N/A = Not Applicable * All measurements of surface resistivity and through resistivity made at ambient temperature with tapes mounted on tinned cor ppe substrate, except for taber abrasion where a plastic substrate was used. ** 90° peel strength tests were done on an Instron at 2 inches per minute with tapes on a 2024 aluminum substrate. *** CHO-TP-57 available from Chomerics on request. **** Through resistivity...