In this paper, the vacuum reflow soldering technology for semiconductor
laser chips in optoelectronic devices was studied and analyzed in a systematic
manner. Through the study on the key elements in the reflow soldering process,
such as the selection of solders, <a>chamber</a> vacuum, flux,
and the pressure applied by the fixture on the chip, this paper focused on
exploring the formation mechanism of voids in the solder layer when the device was
resoldered. Also, the change in the movement of gas bubbles in the voids with changing
reflow oven chamber conditions and its underlying law were analyzed, by
preparing 200 C-package semiconductor laser diodes and verifying the
reliability and stability of the theoretical analysis through inspection and
test aging. which could provide a theoretical basis for the use of the vacuum
reflow soldering technology to reduce the void rate in the soldering process of
devices.