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:
Dec. 13, 1994
Filed:
Aug. 06, 1993
Applicant:
Inventors:
Hiromichi Matsui, Kagoshima, JP;
Isao Hirota, Kanagawa, JP;
Hideto Isono, Kanagawa, JP;
Hiroshi Hibi, Kanagawa, JP;
Assignee:
Sony Corportion, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
257355 ; 257215 ; 257357 ; 257361 ; 257362 ;
Abstract
A protective circuit protects a plurality of protected portions having different withstand voltages and operation voltages of an active portion of a CCD solid state imaging device or the like by protective elements (e.g., transistors). The respective protected portions can be protected in an optimum fashion in response to the withstand voltages and operation voltages thereof. The breakdown voltages of the respective protective transistors are made different in response to the withstand voltages and operation voltages of the protected portions.