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. 04, 2002
Filed:
Dec. 11, 2000
Masanobu Kato, Tokyo, JP;
Ryozo Furukawa, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, US;
Abstract
The present invention provides a photoreceiving device that is inexpensive and has good properties as a photoreceiving device for selectively receiving long wavelength light. This is a semiconductor photoreceiving device for selectively receiving long wavelength light from multiplexed light including long wavelength light A and short wavelength light B. This photoreceiving device comprises a multilayered film comprising alternately stacked layers of materials having mutually different indexes of refraction and the thicknesses and number of which are designed so as to transmit said long wavelength light and reflect said short wavelength light; and a first light-absorbing layer composed of a material having a band gap wavelength longer than the wavelength of said long wavelength light.