Patent ID: 6719558
Filing Date: 2004-04-13
Classification: A61C,A61N,B23K,Y10S

Abstract:
A curing light comprising:a primary heat sink capable of dissipating heat created by a semiconductor light source, a well in said heat sink, said well being sized to receive a semiconductor chip capable of producing light that is useful in curing light-curable materials, a top opening of said well, a bottom of said well, a wall of said well, said wall of said well being capable of reflecting light of a particular wavelength, a chip mounting pad located in said well in the vicinity of said well bottom, said chip mounting pad being capable of reflecting light of a particular wavelength, a semiconductor chip capable of producing light that is useful in curing light-curable materials, said semiconductor chip being located in said well on said chip mounting pad, said semiconductor chip having a substrate and expitaxial layers, said semiconductor chip being oriented on said pad so that said epitaxial layers of said chip are located between said substrate and said chip mounting paid, and so that said substrate is nearer said top opening of said well than said epitaxial layers of said chip.