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:
Aug. 03, 2004
Filed:
Sep. 24, 2001
Noriyoshi Shida, Saitama, JP;
Keiji Suga, Saitama, JP;
Pioneer Corporation, Tokyo, JP;
Abstract
In case of manufacturing a disk having a two-layer structure, a glass substrate is bonded to a cover layer through an adhesive layer , and a mount hole is formed in a center thereof to form a bonded substrate having a three-layer structure (a). In a state where a stamper formed a predetermined pit pattern is set to a center boss , the bonded substrate is pressed downward in a vertical direction while the mount hole of the bonded substrate is aligned with the center boss ( ). Whereby an information recording surface is transferred onto the cover layer ( ). Subsequently, after the bonded substrate has been bonded to another layer substrate of the disk, the adhesive layer is removed to separate the glass substrate . Finally, there is manufactured the disk having the two-layer structure.