Patent ID: 7777238
Filing Date: 2010-08-17
Classification: F21K,H01L,H05K

Abstract:
1. A chip-type light emitting device, comprising: an insulating substrate; and light emitting elements mounted within an inside of said insulating substrate, wherein said insulating substrate comprises a base substrate for mounting the light emitting elements, and a reflector substrate, being laminated and adhered on a surface of said base substrate, wherein said base substrate is formed with a hole opening having a bottom surface wherein the light emitting elements are mounted on a part of the bottom surface, wiring patterns for electrically connecting said light emitting elements are formed, on an upper end periphery portion of the hole opening of said base substrate, and a heat radiation conductive body, formed on the bottom surface of said hole opening and providing said bottom surface, which is thicker than a thickness of a metal thin film forming said wiring patterns, wherein said reflector substrate is formed with a through hole having a diameter larger than that of said hole opening, the through-hole is positioned concentrically over the hole opening of said base substrate, wherein said wiring patterns contain parts functioning as light emitting element connecting lands that are formed near the outer periphery of the hole opening of said base substrate and which are exposed at the bottom surface of the through hole of said reflector substrate, a reflection film formed at least on an inner peripheral surface of said through-hole, wherein said reflection film is comprised of a metal thin film, and electrodes electrically connected with said wiring patterns and said light emitting elements are formed on end surfaces of said base substrate and said reflector substrate, wherein the wiring patterns for connection with the electrodes are arrayed in a polarity order of “+”, “+”, “−” and “−” so that each of the wiring patterns has a neighboring wiring pattern of the same polarity adjacent thereto.