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:
Sep. 13, 2011
Filed:
Nov. 28, 2007
Hidehiro Sasaki, Minato-ku, JP;
Masae Kubo, Minato-ku, JP;
Kenjirou Kiyono, Minato-ku, JP;
Mitsubishi Kagaku Media Co., Ltd, Tokyo, JP;
Abstract
An information recording medium having a recording track wherein the recording track includes a first recording region R, a second recording region Rand a recording region transition section Sx arranged between regions Rand R; a track pitch tp, a groove width wand a groove depth din region R, and a track pitch tp, a groove width wand a groove depth din region Rsatisfy formula (1), (2) and/or (3); the recording region transition section Sx includes a track pitch transition section Stp in which the track pitch changes from tpto tpand a groove shape transition section Sg in which the groove width changes from wto wand/or the groove depth changes from dto d; and the track pitch transition section Stp and the groove shape transition section Sg at least partially overlap to share a region SL.