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:
Jan. 24, 2006
Filed:
Feb. 14, 2001
Yoshikazu Takagishi, Fujioka, JP;
Atsuo Shimizu, Saitama, JP;
Ryuichi Sunagawa, Takasaki, JP;
Keiichi Ida, Gunma, JP;
Mitsuo Sekiguchi, Gunma, JP;
Isao Matsuda, Takasaki, JP;
Yoshikazu Takagishi, Fujioka, JP;
Atsuo Shimizu, Saitama, JP;
Ryuichi Sunagawa, Takasaki, JP;
Keiichi Ida, Gunma, JP;
Mitsuo Sekiguchi, Gunma, JP;
Isao Matsuda, Takasaki, JP;
Taiyo Yuden Co., Ltd., Tokyo, JP;
Abstract
An optical information recording medium, recording and reproducing method and device for same, and an optical pickup, which enables high-density recording and high-speed recording. Recording or reproduction is performed to or from the optical information recording medium having a track pitch Tp of 1.0 μm≦Tp≦1.2 μm, using laser light having a wavelength λ of 770 nm≦λ≦830 nm, and a spot diameter Sd of 1.1 μm≦Sd≦1.3 μm.