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:
Jun. 20, 2000
Filed:
Sep. 20, 1996
Hiroyuki Yamamoto, Tenri, JP;
Yoshio Yoshida, Nara, JP;
Motohiko Yamamoto, Ikoma-gun, JP;
Yukio Kurata, Tenri, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A waveguide-photodetector includes a semiconductor substrate; a waveguide section, provided on the semiconductor substrate, for propagating light; an opto-electric converting section, provided in the semiconductor substrate, for converting the light into an electric signal; and an insulative layer provided between the semiconductor substrate and the waveguide section. The waveguide section includes at least an introducing part for introducing the light to the waveguide section, a coupling part for coupling the light introduced to the waveguide section to the opto-electric converting section, and a propagating part for propagating the light from the introducing part to the coupling part. The insulative layer includes a first region for defining a position and a shape of an impurity diffused region of the opto-electric converting section, a second region which encloses the first region and is thicker than the first region, and a step portion between the first region and the second region. The introducing part, the propagating part and the coupling part of the waveguide section are located on the first region.