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:
May. 30, 1995
Filed:
May. 06, 1994
Yasushi Fujimura, Yokohama, JP;
Ichiro Tonai, Yokohama, JP;
Abstract
This invention relates to a light detecting device comprising a first conduction-type semiconductor substrate, a first conduction-type semiconductor crystal layer formed on the surface of the substrate, and a second conduction-type first region formed in the semiconductor crystal layer. The first region is surrounded by a second conduction-type second region. On the surface of the semiconductor crystal layer, an electrode is formed on the first region, and a reflection preventing layer is formed on that part of the first region inside the electrode, and a device protecting film is formed on that part of the first region outside the electrode. On the semiconductor crystal layer, a metal film is formed in contact both with the semiconductor crystal layer and with the second region. This structure enables the second region to capture unnecessary charges and further to recombine and extinguish them.