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:
Jun. 27, 2006
Filed:
Apr. 04, 2003
Hiroshi Konishi, Tokyo, JP;
Seiji Morita, Yokohama, JP;
Hiroshi Konishi, Tokyo, JP;
Seiji Morita, Yokohama, JP;
Nikon Corporation, Tokyo, JP;
Abstract
In a DVD-R, landsand groovesare alternately formed in a spiral configuration; the landsform projecting parts, and the groovesform recessed parts. Recorded information is written into the grooves, while land pre-pitsare formed in some portions of the lands. The land pre-pitsform recessed parts, and the respective land pre-pitscover the entire width of the corresponding landas shown in the figures. These land pre-pitsare arranged so that a>b>0.5×a, where a is the maximum length of the land pre-pits, and b is the minimum length (ordinarily, the minimum length is the shorter of the lengths band bof the land pre-pits in the circumferential edge portions of the lands (i.e., the boundary portions with the grooves)). Furthermore, the value of a is set at 0.2 μm to 0.4 μm.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile