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. 15, 2014
Filed:
Jun. 01, 2011
Applicants:
Yoshiyuki Urakawa, Kanagawa, JP;
Yuichi Suzuki, Kanagawa, JP;
Junichi Horigome, Tokyo, JP;
Inventors:
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 5/55 (2006.01); G11B 20/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A recording device performs recording on an optical disc recording medium having a reference face having a reflection film provided with a position guide, and a recording layer provided at a position of a depth different from that of the reference face and performing information recording by mark forming according to irradiation of light. The recording device includes a light generating and irradiation unit, a recording unit, a tracking mechanism, a first tracking error signal generating unit, a second tracking error signal generating unit, a tracking servo control unit, and a control unit.