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. 03, 1994
Filed:
Oct. 06, 1992
Junji Okada, Kanagawa, JP;
Hiroshi Fujimagari, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
An image sensor is provided with a plurality of photodiodes each having a better forward-current responsiveness and a smaller dark current in the reverse direction. Each of the photodiodes includes a two-layered photoelectric conversion layer made of non-doped hydrogenated amorphous silicon. One of these two layers, which has an interface that prevents electrons from escaping when photogenerated electric charge is stored, is deposited at a lower temperature than the other. The photodiodes are arranged in rows on a transparent electrode. The photodiodes operate in pairs, each pair corresponding to one picture element and having a first photodiode connected to a second photodiode in series, with opposite polarity. All the first photodiodes are connected to a detecting circuit and all the second photodiodes are connected to a pulse generating circuit.