3. Reasons and solutions for the yellowing of LED lamp beads.
The yellowing of the LED outer sealant is mostly caused by the mismatch between the epoxy resin and the curing agent, but it cannot be ruled out that the outer sealant bake time is too long. Solution: Purchase a complete set of external sealant and curing agent, pay attention to production control, and strictly follow the operation instructions to avoid reasons such as too long or insufficient baking time. This situation is well mastered.
4. What is the cause of the leakage of LED lamp beads?
The machine is not grounded, and the personnel are not wearing an electrostatic bracelet. Improper electrostatic protection caused. In the packaging process, the PAD of the bonding wire is offset, and finally the quality of the chip itself is hidden.
5. What factors are related to the large luminous decline of LED lamp beads?
a. Poor thermal conductivity of the iron bracket.
b. Yellowing of epoxy resin.
c. The contact between the chip and the support is not close enough.
d. The chip attenuation is large.
