New optical sealant improves LED light output

The Dow Corning Electronics Group introduces the new optical sealant, DOW CORNING OE-6450, which is said to improve LED light output. This new two-part formulation cures when used in lenticular LED components. Elastic gel provides better decompression, durability, moisture protection and UV resistance to maximize light transmission.

Dow Corning offers a wide range of other two-component silicone sealants with different levels of clarity, hardness and adhesion to suit a variety of applications and processes; compared to previously introduced products, the hardness of the OE-6450 with a penetration of 45 due to It is more flexible, so it has better resistance to impact. In addition, this new material also provides an ultra-high refractive index with a refractive index of 1.54, while other methyl-type silicone encapsulants on the market currently have refractive indices much lower than this, and the refractive index is even lower than 1.42.

Most LEDs are covered with a protective sealant to avoid electrical and environmental damage, while also increasing light output and minimizing heat build-up. Traditionally, sealants are still mostly made of epoxy resins and other organic materials because of their hardness, transparency and low cost.

However, as the electronics industry is moving toward higher power and high brightness LEDs, inorganic silicon sealants are now increasingly used. Silicone sealants not only withstand higher temperatures than epoxy resins, but are also compatible with lead-free reflow processes, while also providing higher light transmission and lower moisture absorption.

Billy Han, Global Marketing Manager for LED and Light Source Management Products at Dow Corning, said: "This new low-modulus sealant offers higher light output and better decompression than elastomer or resin-based silicone sealants. Ability."

(Assistant editor: xiaohu)