Micro Contamination Control @

Corporate Highlights Dou Yee established in 1982, is a premier one stop industrial solution provider, serving the semiconductor, data storage, electronics, medical and automotive industries. The Group has a team of highly skilled management and subsidiaries to focus on new products and vertical integration on supplier chain. DYI Group Revenue : S$ 300 Millions DYI Total Employees Worldwide : More than 3000 Manufacturing Plants (Strategically located to be close to business partners and maintain competitive advantage) Eurostat, France C-Pak Cergas Flexd, Japan

Global Capability, Local Focus

Introduction Cleanroom is a facility in which the air supply, air distribution, filtration of air supply, material of construction, and operating procedures are regulated to control airborne particle concentration to meet appropriate cleanliness levels defined by ISO 14644 (Formerly Federal Standard 209E). CLEANROOM CLASSES – Standard Comparison ISO Classification Number Maximum concentration limits (particles/m3 of air) for particles equal to and larger than sizers shown below 0.1 µm Approx. Approx. Equivalent Equivalent Fed. Std Fed. Std 209E 209D Controlled Manufactured Areas Classification...

Types and Sources Of Contamination Equipment Environment People Chemicals Process, Incoming Parts, Materials… Volatile Organic Contaminants Airborne Molecular Contaminants Nonvolatile Residue Adsorbed Molecules Micro-organisms Ions Fibers Submicron Particles Visible Particles Global Capability, Local

Wipe Microlite Wipe • 100% polyester • Economical choice of polyester wipes • Lint free Product code Description/ Size • 100% polyester • Low extractable particles and metallic ions contaminants • Laundered by D.I. water Product code Description/ Size Micro Denier Wipes (Heavy Duty) • Made of micro-thin fibers with highest degree of cleanliness • Superior moisture and oil absorbency • Non-abrasive Product code Description/ Size

Wipe Non-Woven Micro Denier • Made of continuous filament microfiber non-woven material, 80gsm • Economical choice of Micro Denier Product code Description/ Size Product code Description/ Size Product code Description/ Size • Knitted with carbon fiber • Superb for ESD-sensitive applications PolyCell Wipe • Woodpulp added to polyester foundation • Long fibers providing excellent absorbency • Minimal extractable and ionic contaminants • Low static

Wipe Non-woven Wipes • Economic low lint wipes • Good water and oil absorbency Product code Description/ Size • Tough and durable • Easily absorbs oil and most solvents • Made of Polypropylene fibers which are highly chemical resistant Product code Description/ Size Magix SuperSorb Wipe • Developed specially for wet deaning application in the controlled environment • Super absorbent and hold water or liquid up to 18 times its own weight • Lint-free construction and resist shedding of particles due to abrasion • High density structure properties make it ideal for particle sensitive deaning operations...

Swab Cotton Swab Product code 2 headed, 3” paper stem 2 headed, 3” wooden stem 2 headed, 3” paper stem 2 headed, 3” paper stem 2 headed, 3” paper stem 2 headed, 3” paper stem 1 headed, 6” paper stem Foam/Polyester Swab Product code Micro-Stick • The head is made from micro-porous polyurethane foam and attached to a strong polypropylene stem mechanically without adhesive • Extremely soft with ultra-low particle generation • PP stem reusable and heads replaceable with spares Product code

• Powder-free • Low ion contamination • Anti-static • Ideal for microelectronics process Product code Length /Size Latex Glove (Textured) • Highly resistant to low concentration acid and alkalis, abrasion and tearing • Suitable for Class 100 or higher • Ideal for Cleanroom, disk-drive and related industries (HGA,HSA, etc.) Product code Length /Size Nitrile Glove (Finger textured) • Eliminates risk of latex allergy reaction • Better chemical and abrasion resistance than latex loves g • Low odour Product code

Glove Nylon Tricot Glove • 100% Nylon • Soft and smooth • Lint free Product code Anti-Static Lint Free Glove • 100% polyester • Made with continuous less-linting filament knitted with carbon fibre Product code Conductive Glove with PVC dots on palm • 100% polyester • Anti-Static and lint free • PVC dots on palm for better grip Product code

Glove Conductive Glove • Easily absorbs oil and most solvents • Made of Polypropylene fibres which are highly chemical resistant Product code Description/ Size • 100% Nylon with PU coated at Palm (for PF), and at finger tips (for TF) for anti-slip property. • Ideal for clean environment and precise operations. Product code Description/ Size Apparel Hairnet, Non-woven, 12G • Made from spun bonded non-woven, thermally sealed waffle pattern PP • Anti-fraying Product code

Apparel Shoe Cover Product code Anti-slip, Non-woven, 18”, Blue Non-woven, Conductive strip, Blue Sticky Roller • Tacky tape made from LDPE which is cushiony and guarantees noise-free entrapment of dust, dirt and lint. • Perforated tape to ensure easy tear-off • Roller tape is easy to replace. • Colours: White and Clear • Available in ESD version. Item Product code Global Capability, Loca

Disposable Sticky Mat Sticky Mat • Removes contamination on shoes heels, soles and wheels Product code Stationery Cleanroom Paper • Dimensionally stable and compatible in both wet and dry copy system. • Available in White, Blue, Yellow, Green, Pink, Orange, Violet and Light Orange Product code

Tape Cleanroom Tape Antistatic Cellulose • Suitable for cleanroom use • Available in multiple sizes • 3 types with classification as below : Antistatic Vinyl Tape with ESD logo Product code Antistatic Cellulose Antistatic Vinyl Tape with ESD logo Kapton Tapes Kapton Tapes Facemask Non-woven Facemask 6 types as below : Headloop Product code Global Capability, Local Focus