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. 13, 1982
Filed:
Jun. 02, 1981
Applicant:
Inventor:
Abraham Goldman, Kendall Park, NJ (US);
Assignee:
RCA Corporation, New York, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23F / ; G03C / ;
U.S. Cl.
CPC ...
430323 ; 430 28 ; 430283 ; 430289 ; 430318 ; 430329 ; 1566591 ; 156904 ;
Abstract
The method comprises producing on the surface to be etched a stencil of a light-hardened PVA. The stencil is produced by light hardening selected portions of a film or coating consisting essentially of dichromate-sensitized PVA containing about 5 to 30 weight percent with respect to the weight of PVA solids of N-methylol acrylamide. After light hardening, the nonhardened portions of the film are removed, thereby producing the stencil. The stencil is baked to improve its etch resistance, the surface is etched through the stencil, and then the stencil is removed from the surface.