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:
Jul. 07, 1992
Filed:
Jun. 26, 1991
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
437 70 ; 437 62 ; 437 69 ; 437 61 ; 437 52 ;
Abstract
There are provided semiconductor devices including a semiconductor substrate having a surface divided into a first and second regions, a plurality of active regions formed on the substrate, and a local-oxidized (LOCOS) insulating film formed on the substrate as an isolation region for electrical isolation of the active regions from each other. The LOCOS insulating film is thicker in the first region than in the second region, or the LOCOS insulating film has a difference in level based on the thickness change in the vicinity of the boundary between the first and second regions. Also provided are various methods for producing such semiconductor devices.