Abstract
The effect of joint strength of PbSn and AuSn solders on temperature cycling tests in laser packages has been studies experimentally and numerically. It was found that the joint strength increased as temperature cycle number increased and then decreased after 300 cycles. The break surface of PbSn and AuSn solders showed that there increased the brittle manner in the solder joints after 300 temperature cycles. This joint strength decreased may be due to the brittle fractures associated with crack initiation in solder joints. A finite-element method (FEM) simulation of joint strength was in good agreement with the experimental measurements.
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