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:
Oct. 06, 1992
Filed:
Dec. 11, 1990
Applicant:
Inventors:
Giampiero Ferraris, Monticello, IT;
Antonio Tersalvi, Milan, IT;
Assignee:
Siemens Telecommunicazioni S.p.A., Milan, IT;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ; H01C / ;
U.S. Cl.
CPC ...
156652 ; 156656 ; 1566591 ; 296101 ; 29620 ;
Abstract
A process on a single insulating substrate for depositing in succession a thin layer of tantalium with high resistivity doped with nitrogen and oxygen, a less thin layer of titanium with low resistivity doped with nitrogen, a layer of palladium and a thick layer of gold. Selective chemical attacks of said layers then permit tracing of conducting lines, resistive lines with greater resistance and resistive lines with less resistance.