The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 29, 2008
Filed:
Sep. 13, 2005
Hidekazu Aoyagi, Niiza, JP;
Tetsuji Matsuo, Niiza, JP;
Hidekazu Aoyagi, Niiza, JP;
Tetsuji Matsuo, Niiza, JP;
Sanken Electric Co., Ltd., Saitama, JP;
Abstract
An LED includes a light-generating semiconductor region having an active layer sandwiched between two confining layers of opposite conductivity types for generating light. A cathode is arranged centrally on one of the opposite major surfaces of the semiconductor region from which is emitted the light. A reflector of electroconductive material is formed on the other major surface of the semiconductor region for reflecting the light back toward the light-emitting surface of the semiconductor region. For protecting the LED against breakdown from overvoltages, a zener diode is employed which takes the form of a baseplate having two semiconductor regions of opposite conductivity types sandwiched between a pair of electrodes in the form of metal layers. The protector baseplate is integrated with the light-generating semiconductor region by joining one of the metal layers to the reflector under heat and pressure, thus serving as both mechanical support and overvoltage protector for the LED.