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:
Aug. 13, 1996
Filed:
Aug. 29, 1994
Applicant:
Inventor:
Thomas J Licata, LaGrangeville, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
437189 ; 437194 ; 437198 ; 437195 ;
Abstract
An improved method of forming interlayer interconnections employs the same material (or materials that are etched similarly) for both the stud and the upper interconnect in which the stud is surrounded by a collar of conductive material that is also resistant to the etching process used to define the upper wire interconnect.