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Sima De Optoelectronics Project Director Zhang Luhua
Smect's current series of EMC3020/3030/2016 products can achieve dense patch, with reflectors and related lenses, can achieve COB light source effect, higher light efficiency, but the price is greatly reduced. I believe that the good stability of EMC also determines that EMC packaged light sources will have a larger market in LED backlights. 
[Brand Power·Smectic Optoelectronics] EMC Packaging Trends and Solutions
At present, the mainstream package material on the market is PPA, and the new package material EMC (epoxy molding material) is obviously different from the former. The former is thermoplastic and the latter is thermosetting. Smect is also one of the few manufacturers in China that can independently produce EMC scaffolding materials.