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:
Mar. 18, 2003
Filed:
Sep. 10, 2001
Waclaw C. Koscielniak, Santa Clara, CA (US);
Philipp Lindorfer, San Jose, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A vertical photodetector for detecting different wavelengths of light. The structure provides doped regions, which are separated by barrier regions. The doped regions detect photons corresponding to different wavelengths of light. Specifically, by detecting the amount of electrical charge collected by diodes positioned in the different doped regions, different wavelengths of light can be detected. The barrier regions inhibit the flow of electrical charges from one doped region into another doped region. The area of the doped regions can be increased, without increasing the capacitance of the diodes which are used to detect the electrical charges generated by light incident of the vertical photodetector.