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:
Feb. 26, 2002
Filed:
Nov. 12, 1998
Helfried Weinzerl, Feldkirch, AT;
Dubs Martin, Maienfeld, CH;
Unaxis Balzers Aktiengesellschaft, Balzers, LI;
Abstract
An optical data storage disk has a disk surface and a thickness and includes, in a direction from the disk surface and toward the thickness, at least two spaced-apart interfaces which are each embossed with stored information. An innermost one of the interfaces from the disk surface has a first layer which is reflective for light of a selected wavelength and at an incident angle <90°. The other has a second layer which is partially reflective and partially transmitting for light of the same selected wavelength and incident angle. All remaining material of the disk in the thickness from the disk surface to the innermost interface, substantially transmits light of the selected wavelength. The first and second layers are made of Ag Ma Mb or Cu Ma Mb , where x>50 at % and Ag or Cu are a first metal, Ma is a second metal and Mb is a third metal.