Patent ID: 7201497
Filing Date: 2007-04-10
Classification: F21K,H01L,H01S,H05K,Y02P,Y10S

Abstract:
1. A light emitting apparatus comprising: one or more light emitting chips emitting light predominantly in a wavelength range between about 400 nanometers and about 470 nanometers; and a printed circuit board on which the one or more light emitting chips are disposed, the printed circuit board including: (i) an electrically insulating board, (ii) electrically conductive printed circuitry, and (iii) an electrically insulating solder mask having vias through which the one or more light emitting chips electrically contact the printed circuitry, the solder mask having a reflectance of greater than 60% at least between about 400 nanometers and about 470 nanometers, the solder mask including an electrically insulating binder material and a filler material dispersed in the binder material, the filler material having reflectance greater than about 85% at least between about 400 nanometers and about 470 nanometers.