Silicone resin has outstanding weather resistance, which is unmatched by any organic resin. Even under strong ultraviolet radiation, silicone resin is resistant to yellowing. At present, most of the widely used LED optoelectronics market is methyl-based organic silica gel, and phenyl-based organic silica gel is only used in high-demand fields due to its relatively high cost. Various problems encountered in the use of silica gel: 1. The surface wrinkles after curing. This is caused by shrinkage. In most cases, it is caused by the addition of solvent-based silicone resin to the glue. It is recommended to change the glue. 2. The interface layer appears. This problem is also caused by glue. There will be an interface between any two different materials. The only way to solve it is to use the principle of similar materials. Many friends have proposed increasing the curing temperature or sintering at high                 temperatures. If these are some flickers, the only solution is to start from the material, and change the affinity of silica gel when another material cannot be changed. 3. The phosphor has precipitated. Eliminate the problem of powder. The glue in this case can only be cured at room temperature, because in order to maintain its light transmittance, refractive index, etc., any suspending agent cannot be added to the silica gel. Go in, friends who encounter these problems can try to replace them with products that are cured by heating, which can solve this problem. 4. The surface is not smooth enough after curing. This is caused by the poisoning of S, P and so on. The solution is to improve the adhesion and matching between silicone and the adhered body, and then cooperate with it. Extend the baking time to improve the current adhesion problems.