Light transmissive epoxy resin compositions and optical semicond

Details Light transmissive epoxy resin compositions and optical semicond Light transmissive epoxy resin compositions and optical semicond

1991-08-23

1993-03-30

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523219, 523444, C08K 906

Patent

active

051984792

ABSTRACT:
In a light transmissive epoxy resin composition comprising (A) an epoxy resin and (B) a curing agent are blended (C) an organic phosphorus anti-discoloring agent and (D) silica-titania glass beads surface treated with an organic silicon compound. The composition restrains coloring in composition form and discoloration in cured form while curing into clear low stressed products having high light transmittance. Optical semiconductor devices encapsulated with the cured epoxy resin composition are reliable.

REFERENCES:
patent: 4842837 (1989-06-01), Shimizu et al.
patent: 4985751 (1991-01-01), Shiobara et al.
Best, M. F., Condrate, R. A. Sr.; "A Raman Study of TiO.sub.2 -SiO.sub.2 Glasses Prepared by Sol-Gel Processes"; Journal of Materials Science Letters, 4, 1985, 994-998.

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