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:
Nov. 29, 1983
Filed:
Jul. 09, 1982
Applicant:
Inventors:
Veronica I Mayne-Banton, Ossining, NY (US);
Rangaswamy Srinivasan, Ossining, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B44C / ; C03C / ; C03C / ;
U.S. Cl.
CPC ...
156643 ; 156654 ; 156668 ; 2191 / ; 2504921 ; 427 531 ; 427 541 ;
Abstract
A technique is described for photoetching polyesters, such as polyethylene teraphthalate (PET), efficiently, and without causing degradation or heating of the bulk of the PET material. At least about 1000.ANG. of the polyester are removed by application of ultraviolet radiation having wavelengths less than 220 nm. To enhance the process, irradiation can occur in the presence of oxygen or air.