An accelerated life prediction method for bga solder joints
A technology of accelerated life and prediction method, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of unsuitable BGA solder joints, long test cycle, and inability to quickly obtain BGA solder joint life data, etc.
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Embodiment 1
[0094] a) Randomly select 32 BGA solder joint samples of speech devices (belonging to consumer electronics products), and carry out environmental stress screening treatment on the BGA solder joint samples, including performing the first temperature cycle treatment on the samples, and the first The temperature cycle treatment is to heat the sample to a temperature of 70°C and hold it for 10 minutes, then cool the sample temperature to -45°C at a speed of 15 (°C / min) and hold it for 10 minutes as a cycle cycle, and the sample is subjected to multiple cycles. Cycle processing until the sample fails, and record the processing time before the sample fails; (this part is the content of environmental stress screening)
[0095] b) Perform comprehensive stress treatment on the sample treated in step a), including: carry out the second temperature cycle treatment, random vibration treatment and electrical stress treatment on the sample treated in step a), and record the failure time of t...
Embodiment 2
[0120] a) Randomly select 40 BGA solder joint samples of the ground signal system circuit board (belonging to telecommunication equipment) for train operation, and carry out environmental stress screening treatment on the BGA solder joint samples, including performing the first temperature cycle treatment on the samples, so The first temperature cycle treatment is to heat the sample to a temperature of 85°C and hold it for 30 minutes, and then cool the sample temperature to -25°C at a speed of 25°C / min and hold it for 30 minutes as a cycle cycle. Sub-cycle processing until the sample fails, and records the processing time before the sample fails; the environmental stress screening part
[0121] b) Perform comprehensive stress treatment on the sample treated in step a), including: carry out the second temperature cycle treatment, random vibration treatment and electrical stress treatment on the sample treated in step a), and record the failure time of the sample; The second tem...
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