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. 13, 2001
Filed:
Sep. 24, 1998
Junsaku Nakajima, Kashihara, JP;
Takeshi Yamaguchi, Sakai, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A thermomagnetic recording and reproducing head includes a floating slider, and a heating head, a reproduction-use magnetic head as an MR head and a recording-use magnetic head as a thin-film inductive head mounted on the floating slider in this order from an upstream side of a track. The heating section of the heating head is formed by boron nitride or ruthenium oxide, and has a width narrower than the widths of the reproduction-use magnetic head and recording-use magnetic head. Moreover, the recording layer of a disk medium is made from an N-type ferrimagnetic material, the coercive force of the recording layer at a recording temperature and saturation magnetization thereof at a reproduction temperature are adjusted, and the compensation temperature of the recording layer is adjusted to be substantially room temperature. The thermomagnetic recording and reproducing head can realize a narrow track without decreasing the widths of the recording-use magnetic head and reproduction-use magnetic head, thereby increasing the track density.