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:
Mar. 21, 1995
Filed:
Apr. 01, 1993
Applicant:
Inventors:
Gregor Strasser, Vaduz, LI;
Michael Hennessey, Detroit, MI (US);
Assignees:
Balzers Aktiengesellschaft, Southfield, LI;
Producers Color Service, Inc., Southfield, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; B05D / ; C23C / ;
U.S. Cl.
CPC ...
3692751 ; 369 13 ; 369272 ; 3692755 ; 369283 ; 430271 ; 430495 ; 427294 ; 20419214 ; 20419227 ;
Abstract
An optical storage disk has a body made of PMMA bulk material with a surface of PMMA. Aluminum or an aluminum alloy, light reflecting layer coats the PMMA surface and is applied using a sputtering apparatus in a sealed gas atmosphere containing argon and carbon containing gas. Application of the coating using sputtering takes place immediately after the PMMA body is inserted into the sealed gas atmosphere and without any pretreatment to the PMMA surface.