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:
Sep. 14, 1999
Filed:
Feb. 24, 1997
Applicant:
Inventors:
Takashi Ohtsuka, Toyonaka, JP;
Tetsuo Kawakita, Tuzuku-gun, JP;
Kazuhiko Matsumura, Kadoma, JP;
Hiroaki Fujimoto, Hirakata, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
257737 ; 257778 ;
Abstract
A semiconductor device having a protection layer covering the active layer of a semiconductor chip with an opening therein corresponding in location to a chip electrode located on the active surface of the semiconductor chip. Inside the opening a barrier layer covers the chip electrode, a diffusion barrier layer covers the barrier layer and a protruding contact protruding from the diffusion barrier layer. The protruding contact preferably comprises material whose hardness is lower than that of each of the barrier layer and chip electrode.