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. 17, 1977
Filed:
Sep. 29, 1975
Applicant:
Inventor:
Masayoshi Yoshimura, Tokyo, JA;
Assignee:
Hitachi, Ltd., , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 68 ; 357 36 ; 357 45 ; 357 54 ; 357 71 ;
Abstract
In a transistor wherein a second conductivity type region is formed surrounding a first conductivity type region in a principal surface electrodes are formed on a surface of the first conductivity type region, an electrode of the second conductivity type region is formed in a manner to encircle the first-mentioned electrodes, and electrodes of the first conductivity type region are led outside the electrode of the second conductivity type region through an insulating film, whereby concentration of current is prevented.