User manual 3M ATTACHING FLEXIBLE CIRCUIT TO LCD OR PCB

[. . . ] Application Profile Market: Hand Held Devices Application Description: Attaching Flexible Circuit to Liquid Crystal Display (LCD) or a Printed Circuit Board (PCB). Electrically connects and mechanically bonds flexible printed circuits to the glass substrates of LCDs 3MTM Z-Axis Adhesive Film 5460R or 7303 Application Method Heat and pressure bond using hot bar bonder. PRODUCT 3MTM Z-Axis Adhesive Films 5352R, 5552R, 5460R and 7303 Key Application Requirements Fine pitch interconnect. Benefits/Advantages To Customer Fine pitch interconnection: Bonds to pads as small as 100 mil²; pitch as fine as 5. 5 mils. High reliability, stable properties: Eliminates solder bridging. [. . . ] Electrical interconnection is made by contact between conductive particles in the adhesive (0. 5 mil diameter or smaller) and circuit lines on the substrates. During the heat bonding operation (which cures and crosslinks the adhesive), pressure is applied and maintained until the system is cooled. As the temperature declines, the adhesive contracts to a greater degree than the particles. The circuits are pulled together against the particles and held there. The adhesive provides a permanent, high reliability bond. 5000 series ZAF products provide low electrical resistance bonds capable of withstanding most burn-in and thermal cycle tests, including -55º C/125º C (-67ºF/257ºF) thermal cycling or 85º C (185ºF)/85% relative humidity aging for 1000 hours with less than 10 milliohms change in contact resistance (see data pages for specific details). Repairability can be achieved by application of heat to separate the circuits followed by solvent clean-up of the site. Product 3M Z-Axis Adhesive Film 5352R 3MTM Z-Axis Adhesive Film 5552R 3MTM Z-Axis Adhesive Film 5460R 3MTM Z-Axis Adhesive Film 7303 TM Advantages For many fine pitch applications. Low electrical resistance (milliohms) Note: 3M 5000 series Z-Axis Adhesive Films are provided on plastic reels and must be stored in a freezer below 0° C (32° F) to maintain shelf life. 3M Z-Axis Adhesive Film 7303 may be stored at room temperature for up to nine months. Key Decision Makers Design Engineers, Production Engineers For Additional Information To request additional product information or to arrange for sales assistance, call 1-800-362-3550. Address correspondence to: 3M Industrial Business Customer Response Center, Building 21-1W-10, 900 Bush Avenue, St. [. . . ] 3M shall not otherwise be liable for any loss or damages, whether direct, indirect, special, incidental, or consequential, regardless of the legal theory asserted, including, but not limited to, contract, negligence, warranty, or strict liability. Industrial Business Building 21-1W-10, 900 Bush Avenue St. Paul, MN 55106 Developed in USA Ecpd5352. pdf © 3M 2002 [. . . ]