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:
Nov. 09, 1993
Filed:
Sep. 08, 1992
Applicant:
Inventors:
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
257745 ; 257748 ; 257757 ; 257763 ; 257764 ; 257768 ; 257769 ; 257781 ;
Abstract
A semiconductor device having a GaAs substrate and an ohmic electrode. An electrode pad is on part of the ohmic electrode and on part of the GaAs substrate outside the ohmic electrode. The electrode pad includes a first platinum film, a titanium film, a second platinum film, and a gold film which are sequentially deposited on one another. The first platinum film is thinner than each of the titanium film, second platinum film and gold film.