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. 01, 1983
Filed:
Sep. 03, 1980
Applicant:
Inventors:
Hirohiko Mochizuki, Tokyo, JP;
Masao Nakano, Kawasaki, JP;
Fumio Baba, Yokohama, JP;
Tomio Nakano, Kawasaki, JP;
Yoshihiro Takemae, Yokohama, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; G11C / ;
U.S. Cl.
CPC ...
357 65 ; 357 45 ; 357 51 ; 357 54 ; 357 71 ;
Abstract
A semiconductor memory device has fuses coated with a protecting layer. The protecting layer is selectively etched to open windows so as to expose narrow center portions of the fuses. After the opening of the center windows, the fusing operation of the fuses is carried out to open a gap in the center window portion of the fuse material. In a preferred embodiment, another protective layer is then added to fill the gaps in the blown fuses.