发明名称 |
SHIELDING TYPE MAGNETIC HEAD AND MAGNETIC REPRODUCING DEVICE |
摘要 |
PROBLEM TO BE SOLVED: To constitute a shielding type high frequency impedance head as a high sensitive magnetic head canceling an impedance component which is not varied by a signal magnetic field and detecting only an impedance component which is varied by the signal magnetic field. SOLUTION: The shielding type magnetic head is so constituted that plural conductive magnetic films 1, 2, 3 and 4 extended in a direction parallel to a magnetic recording medium facing surface are disposed by arranging the magnetic films mutually at intervals in a direction perpendicular to the facing surface in a gap 7 which constitutes the shielding type magnetic head. A bridge circuit is formed by the four conductive magnetic films and a high frequency carrier signal is applied and the change of the impedance of a first conductive magnetic film 1 by the signal magnetic field of the magnetic recording medium is detected as the change of the high frequency carrier signal.
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申请公布号 |
JP2002056510(A) |
申请公布日期 |
2002.02.22 |
申请号 |
JP20000238630 |
申请日期 |
2000.08.07 |
申请人 |
MATSUSHITA ELECTRIC IND CO LTD |
发明人 |
KUROE AKIO;MURATA AKIO;MURAMATSU SAYURI |
分类号 |
G01R33/02;G11B5/02;G11B5/33;H01L43/00;(IPC1-7):G11B5/33 |
主分类号 |
G01R33/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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