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:
Mar. 25, 2002
Applicant:
Inventors:
Shinsuke Okuda, Tochigi, JP;
Takashi Ishii, Tochigi, JP;
Assignee:
Quantum Corporation, San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 2/102 ;
U.S. Cl.
CPC ...
G11B 2/102 ;
Abstract
A method of writing servo signals on magnetic tape which comprises making a single laser beam ( ) pass through a diffraction element ( ) to split it into a plurality of beams ( ) traveling in prescribed directions and then making the plurality of beams ( ) pass through an optical convergence system ( ) to form converged beam spots on a site of a magnetic tape ( ) which is capable of forming servo tracks, the magnetic tape ( ) being running at a prescribed speed, to cause the site to change physically or chemically thereby forming a plurality of servo tracks (S) in the longitudinal direction of the tape simultaneously.