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:
Apr. 13, 2010
Filed:
Jul. 26, 2005
Takaari Uemoto, Osaka, JP;
Hiroyuki Naito, Osaka, JP;
Takaari Uemoto, Osaka, JP;
Hiroyuki Naito, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Provided is a light source that has high reliability and hardly causes conductivity failure between a light emitting device and a conductive land. In an LED light source of the present invention, an LED bare chip is mounted to conductive lands of a substrate, using bumps (). The LED bare chip (D) is provided with a p-electrode (Lp) and an n-electrode (Ln) on a rear surface. The p-electrode (Lp) is larger in area than the n-electrode (Ln). The p-electrode (Lp) is bonded to a corresponding conductive land via four bumps (), whereas the n-electrode (Ln) is bonded to a corresponding conductive land via one bump (). A bonded area (Sn) between the n-electrode (Ln) and the bump () is larger than a bonded area (Sp) between the p-electrode (Lp) and one of the bumps ().