Patent ID: 7717591
Filing Date: 2010-05-18
Classification: F21K,H05K,Y10T

Abstract:
1. A light emitting apparatus comprising: one or more light emitting chips; a printed circuit board on which the one or more light emitting chips are disposed, the printed circuit board including an electrically insulating board, electrically conductive printed circuitry, and an electrically insulating solder mask having vias through which the one or more light emitting chips electrically contact the printed circuitry, wherein the solder mask has a reflectance level less than about 80% for visible light; and a reflective film on the solder mask, the reflective film including polytetrafluoroethylene (PTFE) and having openings that align with respective vias in the solder mask through which the one or more light emitting chips electrically contact the printed circuitry, the reflective film having a reflectance of greater than about 90% at least between about 400 nanometers to about 750 nanometers.