Detection and Prevention of Particle in Solid State Relay
The hermetic solid-state relay uses semiconductor power devices as switching elements,without moving parts,mechanical contacts and electric sparks.It has excellent impact resistance and vibration perform-ance.It is widely used in aerospace,aviation,armored vehicles and other fields.During the production and assem-bly of solid-state relay,it is possible to seal the residual particles such as rosin,solder slag,metal debris,sealing splash,silicon-based debris,bonding tail wire,ceramic substrate debris,printed board debris,human skin deb-ris,clothing fiber,etc.in the cavity Inside,threatening the application security of the subsystem.Based on the detection of superfluous substances,this paper analyzes the types and causes of superfluous substances,and puts forward the control method of superfluous substances.
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