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. 31, 1984
Filed:
Dec. 20, 1982
Applicant:
Inventor:
Eric W Bouldin, Atherton, CA (US);
Assignee:
Drexler Technology Corporation, Mountain View, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ; G11C / ; G01D / ;
U.S. Cl.
CPC ...
430617 ; 3461351 ; 346 / ; 365127 ; 369275 ; 430495 ; 430964 ; 430510 ; 430616 ;
Abstract
An improved reflective silver laser recording and data storage medium for direct read after writing, having a protective gold plating on the silver particles of the reflective surface. The gold plating increases the recording sensitivity resulting in higher contrast ratios for the recorded data. Increased contrast ratios between recorded and non-recorded reflective areas are obtained by the gold plating allowing lower laser energy for readout of recorded data. The reflective silver surface is plated with gold by an electroless ion displacement procedure.