Mail*Link¨ SMTP [TECHNET] Assem: Highly Accelerated Stress Test Technetters, We are investigating the use of a Highly Accelerated Stress Test (HAST) on a PCB assembly using SMT on standard FR4 with Flex attached to represent a 20 year storage condition. The proposed environmental conditions are 120 C at 98 %RH, unbiased. Has anyone performed this type of test and would be willing to comment on its effectiveness? We want to minimize test time, develop an acceleration model to the storage environment, and not introduce new failure modes from the test itself. Thanks for any input. Glenn Pelkey Quality/Reliability Engineer Maxtek Components Corp.