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. 22, 2012
Filed:
Dec. 13, 2007
Daisuke Okamoto, Minato-ku, JP;
Junichi Fujikata, Minato-ku, JP;
Kenichi Nishi, Minato-ku, JP;
Keishi Ohashi, Minato-ku, JP;
Daisuke Okamoto, Minato-ku, JP;
Junichi Fujikata, Minato-ku, JP;
Kenichi Nishi, Minato-ku, JP;
Keishi Ohashi, Minato-ku, JP;
NEC Corporation, Tokyo, JP;
Abstract
A photodiode includes: an upper spacer layer including a semiconductor transparent to incident light; a metal periodic structure provided on the upper spacer layer and arranged to induce surface plasmon, the metal periodic structure including first and second electrodes including portions arranged alternately on the upper spacer layer; a light absorption layer formed under the upper spacer layer and including a semiconductor having a refractive index higher than that of the upper spacer layer; and a lower spacer layer formed under the light absorption layer and having a refractive index smaller than that of the light absorption layer. Each of the first and second electrodes forms a Schottky barrier junction with the upper spacer layer.