Magnetoresistive effect type of head, manufacturing method of magnetoresistive effect type of head, and information reproducing system
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United States of America Patent
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-
Mar 2, 2004
Grant Date -
Aug 1, 2002
app pub date -
Nov 13, 2001
filing date -
Jul 7, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A magnetoresistive head reproduces information recorded on a recording medium with high recording density, suppressing generation of Barkhausen noise. A magnetoresistive effect element in the head is a flat multi-layer film in which a free magnetic layer is set to a lowest layer. The head also includes a non-magnetic substrate, an insulating layer contacting a center portion of a lower surface of a substrate side of the free magnetic layer, and a pair of electrode layers. The electrode layers are formed with the insulating layer in between, contacting both edge portions of the free magnetic layer. The electrodes are formed with the same surface height as the surface height of the insulating layer. A pair of magnetic wall control layers suppress movement of a magnetic wall of the free magnetic layer.
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