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. 14, 1992
Filed:
Jul. 09, 1991
Applicant:
Inventors:
Assignee:
SGS-Thomson Microelectronics S.r.L., Agrate Brianza MI, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
437150 ; 437 27 ; 437149 ; 437953 ; 148D / ;
Abstract
Along the outline of a first doped region, a first mask is formed. The mask is made up of a dielectric opposed to the oxygen diffusion. Another mask is created within this first mask, using a process of selective thermal oxidation. The second mask is used to implant dopant in a second region which will only be defined along the outlines of the first region.