SG Elastomer Cycle Data www.ironwoodelectronics.com Toll Free: (800) 404-0204 U.S. Only Tel: (952) 229-8200 Fax: (952) 229-8201 email: [email protected] Cycle test setup BGA676, 27x27mm, 1mm pitch 26x26 ball array 1. Socket assembled to daisy chain test PCB. 2. Daisy chain device simulator placed inside the socket. 3. Recommended torque applied. 4. Contact resistance measured using multi-meter. 5. Un-tighten the compression screw. 6. Step 3-5 repeated. Note: Every time Cres per pin goes above 0.070 Ohms, daisy chain device simulator solder balls are refreshed by going thru reflow process. IP, 2/15/2013 www.ironwoodelectronics.com 2 Room Temperature Cycle Data Same solder ball was used repeatedly. Peak points are due to bad solder ball. After solder ball reflow, Cres drops to initial value IP, 2/15/2013 www.ironwoodelectronics.com 3