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:
Dec. 18, 2007
Filed:
Apr. 15, 2004
Hajime Suhara, Kanagawa-ken, JP;
Hajime Suhara, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A semiconductor light receiving device is disclosed which is capable of receiving a first wavelength band light beam and a second wavelength band light beam having a shorter wavelength than that of the first wavelength band light beam. The device has a light absorbing layer of a first conductivity type formed on a semiconductor surface region of the semiconductor substrate the light absorbing layer absorbs the first and second wavelength band light beams. A cap layer of the first conductivity type is formed on the light absorbing layer. In the cap layer, a region of a second conductivity type is formed which transmits the second wavelength band light beam. A light collecting layer is formed on the semiconductor surface region and adjacently to the cap layer and the light absorbing layer. The light collecting layer has a convex shape with curvature to collect the second wavelength band light beam.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile