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:
Dec. 22, 1981
Filed:
Apr. 30, 1980
Applicant:
Inventors:
Leon H Kaplan, Yorktown Heights, NY (US);
Steven M Zimmerman, Wappingers Falls, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ;
U.S. Cl.
CPC ...
430296 ; 156643 ; 430191 ; 430325 ; 430326 ;
Abstract
Exposed patterns in phenol-formaldehyde Novolak resin/diazo ketone resist layers are developed in an oxygen plasma by treating the resist layers, prior to development, with a magnesium salt. This produces a negative pattern. Positive patterns are produced by combining the process with decarboxylation of the exposed areas followed by blanket exposure.