First, strictly test the LED raw materials of the solid […]
First, strictly test the LED raw materials of the solid crystal station
1. Chip: Mainly manifested by solder pad contamination, chip damage, chip cutting size, chip cutting tilt.
Precautionary measures: Strictly control the incoming inspection and find that the problem requires the supplier to improve.
2. Bracket: The main performance is that the deviation between the size of the crucible and the C dimension is too large, the bracket is discolored and rusted, and the bracket is deformed.
Poor incoming materials are a supplier's problem, and suppliers should be informed to improve and strictly control the feed.
3. Silver Glue: Mainly manifested as poor viscosity of silver glue, the use period is exceeded, storage conditions and thawing conditions are inconsistent with actual standards.
For the viscosity of silver glue, it is generally not going to be put into production after engineering evaluation, but it is not that the silver glue is the best. If it is found that there is a bad occurrence, it can be evaluated. Other use periods, storage conditions, thawing conditions, etc. are all artificially controlled. As long as the SOP operation is strictly followed, there are generally not many problems.