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. 06, 2009
Filed:
Mar. 23, 2005
Tsuyoshi Takahashi, Gunma, JP;
Katsuya Okabe, Gunma, JP;
Akira Hatsugai, Gunma, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
Disclosed is an optical semiconductor integrated circuit device has an opening portion in an insulating layer, which is formed in a light receiving region of a photodiode stepwise. Thus, a step of the opening portion is reduced, leading to an improvement of a step coverage of a light shadowing film formed on the insulating film so as to cover the insulating film. By the improvement of the step coverage of the opening portion, the light shadowing film located on a plane of the light shadowing film of the photodiode is not broken. A problem that a conventional light shadowing film is broken is solved in the photodiode for a blue laser beam.