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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.:

US 4996438 B1

PDFFull Text
Date of Patent:
Feb. 26, 1991

Filed:

Aug. 15, 1989

Line image sensor with controlled photosensitivity

Applicant:
Inventors:

Tatsuya Nagata, Niihari, JP;

Michihiro Watanabe, Tsuchiura, JP;

Eiichi Hara, Chigasaki, JP;

Takehiko Yamada, Chigasaki, JP;

Assignee:

Hitachi, Ltd., Tokyo, JP;

Attorney:

Antonelli, Terry, Stout & Kraus

Primary Examiner:

David C Nelms

Assistant Examiner:

K Shami

Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
2502 / ; 2502081 ;
Abstract

A photoelectric transfer element of which a reading sensor for reading written materials such as facsimile documents has a controlled photosensitive region within the photoelectric transfer element. Thus photosensitivity in a region of the photoelectric transfer element is reduced to improve element performance. The specific photosensitivity control methods include an electric field control, increased impurity concentration, and irradiation ultraviolet light.

Find Patent Forward Citations

Nagata, Tatsuya. (1991). Line image sensor with controlled photosensitivity (U.S. Patent No. 4996438). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4996438

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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