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:
Mar. 19, 1991
Filed:
Feb. 20, 1990
Applicant:
Inventors:
Assignee:
Kabushiki Kaisha Toshiba, Kanagawa, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 2313 ; 357 238 ; 3072021 ;
Abstract
A semiconductor device is provided with a first protection path between a first terminal and an input terminal, a second protection path between a second power source terminal and the input terminal, and a third protection path between the first and the second power source terminals. Each protection path includes a first and a second P-N junction formed to be reverse biased, and is made conductive when the voltage between the corresponding two terminals exceeds a predetermined voltage so as to protect an internal circuit connected to the input terminal from an electrostatic breakdown.