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:
Jul. 09, 1991
Filed:
Nov. 13, 1989
Shigenori Yakushiji, Yokohama, JP;
Kouji Jitsukata, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Toshiba Components Co., Ltd., Yokohama, JP;
Abstract
A semiconductor apparatus comprises a semiconductor body of one conductivity type; a first impurity region of an opposite conductivity type, which is formed in the surface area of the semiconductor body; impurity regions of the opposite conductivity type, formed in the surface area of the semiconductor body, at locations away from the first impruity region; second and third impurity regions of one conductivity type, which seve as source and drain regions, respectively, and are formed in the impurity regions of an opposite conductivity type, so as to sandwich a channel reigon; and a gate electrode formed on the channel region, through an insulative layer. In this semiconductor apparatus, the impurity regions of the opposite conductivity type include fourth and fifth impurity regions, formed in the channel region such that at least parts of the fourth and fifth impurity regions overlap.