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:
Jan. 27, 1976
Filed:
Jan. 02, 1975
Applicant:
Inventor:
Masayoshi Sugiyama, Hitachi, JA;
Assignee:
Hitachi, Ltd., , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
29583 ; 29590 ; 357 90 ;
Abstract
A method of manufacturing semiconductor devices comprising a semiconductor element having a PN junction in which an N.sup.+-type region is formed in an N-type region constituting the PN junction and another N-type region is formed around the N.sup.+-type region and a metal layer is provided on the other N-type region and the N.sup.+-type region, thereby providing a mechanically and electrically improved ohmic contact to the semiconductor element.