www.ironwoodelectronics.com HBT – Socket for Lab and ATE Applications High Performance IC Sockets And Test Adaptors IP, Oct2012 Application Need www.ironwoodelectronics.com •Longer tip life •Minimal plating wear or no plating •withstands aggressive cleaning •Minimal Oxide Buildup •Less Material transfer rates from DUT to Pin tip •Sharper tips •stay sharper over time •Less Cleaning •Longer Mean Time Between Cleaning Frequency •Reinstates original performance after cleaning •Electrical specs •Same or similar to BeCu alloys •Less downtime •Excellent ROI and COO IP, Oct2012 Solution - HBT Contact www.ironwoodelectronics.com HBT Contact is an etched contact with outside spring that provides a robust solution for test applications that include thermal characterization, burn-in, SLT, ATE, etc. Solution for 0.8mm to 0.40mm (LGA, BGA, QFP packages) in Burn-in & test applications. Contact technology has 3 part system. Etched top plunger (unique proprietary alloy with no plating enables longer tip life & less cleaning), etched bottom plunger (standard BeCu with gold plating) and assembled to a gold plated stainless steel spring to enable reliable interconnect solution with less downtime. Stainless Steel Spring Proprietary alloy Plunger IP, Oct2012 BeCu Plunger HBT Socket Features: Wide temperature range High current capability Excellent signal integrity Low & stable contact resistance Less cleaning & down time IP, Oct2012 www.ironwoodelectronics.com Mechanical Property Comparison www.ironwoodelectronics.com HBT alloy HBT Mechanical property: similar to high carbon steel HBT Electrical property: similar to BeCu No Oxidation IP, Oct2012 Life Cycle Comparison www.ironwoodelectronics.com HBT tip BeCu tip Tested with gold plated device simulator. No difference in average Cres. High standard deviation in BeCu tip due to uneven plating wear. Cycle IP, Oct2012 BeCu, Avg Cres HBT, Avg Cres 0 47mOhms 43 mOhms 100,000 40 mOhms 42 mOhms 250,000 45 mOhms 43 mOhms 500,000 45 mOhms 45 mOhms AC Data comparison www.ironwoodelectronics.com BeCu tip HBT tip Conductivity of HBT is slightly lower than BeCu which is reflected in bandwidth data. At -1 dB IP, Oct2012 BeCu HBT 34.6 GHz 31.5 GHz DC data comparison www.ironwoodelectronics.com HBT tip BeCu tip Conductivity of HBT is slightly lower than BeCu which is reflected in current carrying data. Duty Cycle BeCu HBT IP, Oct2012 1% 4.36 A 3.81 A 10% 4.32 A 4.09 A 25% 3.94 A 3.31 A 50% 3.64 A 3.18 A 100% 1.99 A 1.89 A Life Cycle Comparison BeCu tip www.ironwoodelectronics.com HBT tip Test completed for150K units of actual BGA devices with solder balls on both type of pins. After testing, used gold plated device simulator and measured Cres for 100 cycles. Wide Cres variation in BeCu tip due to solder adhesion and plating wear compared to minimal Cres variation in HBT tip. IP, Oct2012 Tip Strength - Deformation Study in the same socket www.ironwoodelectronics.com SEM picture of tips shown below were impacted against hard steel for 500K cycles. BeCu tip HBT tip 2000 x Evidence of tip wear IP, Oct2012 2000 x No evidence of tip wear Contamination Study www.ironwoodelectronics.com SEM picture of Tips after 500k cycles on Matte Tin, including cycles with MIPOX cleaning pad @25k Intervals. BeCu HBT No Sn contamination and no wear on surface Sn adhesion on worn flat areas as well as on gold plated surfaces IP, Oct2012 HBT Value Proposition www.ironwoodelectronics.com HBT contact enables repeatable electrical/mechanical performance in all lab and ATE applications. Custom socket can be produced using HBT contact in 4 weeks. HBT sockets with wide temperature range (-50C to +150C) are available in same footprint as elastomer GHz sockets with 31.5GHz bandwidth. HBT sockets are robust and can be used in application demonstration modules for multiple handling process without contact degradation. IP, Oct2012