The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 06, 2011
Filed:
Jun. 27, 2008
Chia-wen Hsu, Taipei, TW;
Hsun-tien LI, Hsinchu, TW;
Kai-chi Chen, Nantou County, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
An encapsulant composition for a light-emitting diode is provided. One embodiment of the encapsulant composition comprises: (a) about 100 parts by weight of at least one liquid bi-functional epoxy resin containing about 40˜50 weight % of aromatic ring; (b) about 55˜120 parts by weight of a curing agent comprising at least one bi-functional thiol curing agent containing aromatic ring and at least one aliphatic tetra-functional thiol curing agent, wherein the curing agent contains about 10˜50 weight % of aromatic ring and about 20˜35 weight % of sulfur; and (c) about 0.05˜0.5 parts by weight of a catalyst. The encapsulant composition having a high refractive index can be used for a solid state light emitting device to enhance light extraction efficiency.