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. 10, 1998
Filed:
Nov. 04, 1996
Akio Kuroe, Katano, JP;
Akio Murata, Takatsuki, JP;
Kazuo Yokoyama, Hirakata, JP;
Osamu Kusumoto, Nara, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The present invention relates to a magnetic head for recording and reproducing signals from a magnetic recording medium, wherein the magnetic head comprises a stylus having a pair of electrodes, a conductive multilayer film having a staircase-shaped section, and a magnetic body formed on the multilayer film. The magnetic head further comprises an excitation conductive thin film disposed so as to surround the stylus, a magnetic yoke forming a closed magnetic loop together with a magnetic recording medium and the stylus, and an anti-abrasive film formed on the magnetic yoke so as to oppose the recording medium. During recording, a signal current is supplied to the excitation conductive thin film to generate a recording magnetic field from the end of the stylus. During reproduction, a high-frequency voltage is applied across the electrodes, and a magnetic impedance change of the stylus, caused by a signal magnetism on the recording medium, is detected. The relative position of the magnetic head to the recording medium is controlled by deflecting a cantilever according to a capacitance between the magnetic head and the recording medium. Accordingly, the magnetic head of the present invention is capable of remarkably enhancing recording densities and data transfer rates.