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:
Nov. 23, 2004
Filed:
Feb. 17, 2000
Toshiyuki Mogi, Yokohama, JP;
Kazumi Kawamoto, Yokohama, JP;
Shinji Tsuji, Hidaka, JP;
Hitoshi Nakamura, Hachioji, JP;
Masato Shishikura, Hachioji, JP;
Satoru Kikuchi, Saku, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In aiming at cost lowering of an optical module and an optical transmission apparatus and with the objective of providing a semiconductor light receiving element that has a good coherence with the other edge emitting/incidence type optical devices and is capable of performing the positioning easily and with a high accuracy, in the edge emitting/incidence type light receiving element in which the light absorbing layer has been formed, the space region is formed so as to provide at least 100 &mgr;m of the marker detecting region , thereby facilitating detection of marker on the optical device and executing the positioning of the light receiving element with a high accuracy, the space region resulting from eliminating a part of the light absorbing layer that absorbs the detection light of the light receiving element, the transmission amount of the detection light toward the marker detecting region that is parallel to a primary plane being equal to 30% or higher, the detection light having penetrated and transmitted the primary plane of the light receiving element.