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:
Sep. 07, 2010
Filed:
Apr. 26, 2007
Isamu Sato, Tokyo, JP;
Yoshikazu Soeno, Tokyo, JP;
Koichi Terunuma, Tokyo, JP;
Tetsuya Roppongi, Tokyo, JP;
Hiroshi Ikeda, Tokyo, JP;
Isamu Sato, Tokyo, JP;
Yoshikazu Soeno, Tokyo, JP;
Koichi Terunuma, Tokyo, JP;
Tetsuya Roppongi, Tokyo, JP;
Hiroshi Ikeda, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A magnetic head apparatus is provided which is capable of recording data in a recoding layer having high coercive force with high accuracy without heating. A magnetic recording and reproducing apparatus is also provided which has the magnetic head apparatus. A recording head has: a main magnetic pole; a recording-side front-end shield (a return magnetic pole); a recording-side rear-end shield (a return magnetic pole); a main coil for generating a perpendicular recording magnetic field at the main magnetic pole; and an auxiliary coil for generating a longitudinal alternating current magnetic field having a frequency in the microwave band at the main magnetic pole.