Patent ID: 6099783
Filing Date: 2000-08-08
Classification: B29C,B29K,B33Y,C08F

Abstract:
A method for encapsulating a microelectronic device, comprising:(a) placing said microelectronic device into a mold having a cavity, a place for said microelectronic device within said cavity, and at least one side allowing light to penetrate into the cavity;(b) filling said mold with a photopolymerizable composition comprising at least one monomer to be photopolymerized to a polymer, a photoinitiator having a self-eliminating absorbance, and a filler, wherein said monomer does not have unduly facile extractable hydrogens so as to adversely affect the Photopolymerization and said monomer and polymer have minimal absorbance in the wavelength range where polymerization is initiated;(c) initiating polymerization of said photopolymerizable composition by exposing said composition in said mold to light in an ultraviolet wavelength range where photopolymerization is initiated, and such that the light penetrates into the cavity of said mold; and(d) exposing said photopolymerizable composition to said light for a time adequate to cure said composition throughout.