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:
Jan. 24, 2012
Filed:
Jun. 07, 2007
Tetsuya Yamada, Gifu, JP;
Tetsuya Yamada, Gifu, JP;
Sanyo Electric Co., Ltd., Moriguchi-shi, JP;
Abstract
In a light detector that is a semiconductor integrated circuit, a wiring structure is disposed on a semiconductor substrate along a periphery of a rectangular region that corresponds to a light receiver, and an interlayer insulating film composed of an SOG film is layered over the wiring structure. In this structure, the interlayer insulating film is thicker at a corner than at a center part of the light receiver. In order to increase efficiency of the incidence of light on the light receiver, the planar shape of the open part is formed so that the corners of the rectangle that surrounds the wiring structure are removed when the interlayer insulating film is etched and the open part is formed (i.e., yielding an octagonal shape). Accordingly, the effects of differences in the thickness of the interlayer film at the center part and corners of the light receiver are avoided, a bottom surface of the open part is formed in a flat manner, and uniformity in the incidence of light from the open part to the light receiver is improved.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile