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:
Nov. 20, 2007
Filed:
Aug. 27, 2004
Tetsuo Samoto, Miyagi, JP;
Takanori Sato, Miyagi, JP;
Kazunari Motohashi, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
A lower magnetic layer magnetized and formed in a first direction and an upper magnetic layer magnetized and formed in a second direction opposite to the lower magnetic layer are laminated on a base. A ratio T/Tof a thickness Tof the upper magnetic layer to a thickness Tof the lower magnetic layer is located within a range of 0.6 to 0.9. Thus, in a herringbone type dual evaporated tape in which data is recorded and reproduced in a serpentine fashion, a vertical magnetization component is canceled to reduce the difference in the waveform distortion of a reproducing signal between a forward direction and a reverse direction.