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US 7,008,703 B2Granted
Magnetic detecting element having second antiferromagnetic layer overlying second free magnetic layer extending in track width direction beyond track width
AssigneeAlps Electric Co., Ltd.
InventorsNaoya Hasegawa, Eiji Umetsu
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Abstract
A magnetic detecting element has a multilayer laminate including a first free magnetic layer. A second antiferromagnetic layer is disposed on each side surface of the multilayer laminate in the track width direction. A second free magnetic layer is disposed from the upper surface of the second antiferromagnetic layer to the upper surface of the first free magnetic layer. Thus, the shield distance in the central portion of the element can be prevented from increasing, and the insulation between a shield layer and an electrode layer is enhanced.
Claims19
A magnetic detecting element comprising:
- a multilayer laminate including a first antiferromagnetic layer, a pinned magnetic layer, a nonmagnetic material layer, and a first free magnetic layer in that order from a bottom thereof;
- a pair of second antiferromagnetic layers disposed in a track width direction, respectively, at each side of the multilayer laminate in the track width direction;
- and
- a continuous second free magnetic layer disposed over each upper surface of the pair of second antiferromagnetic layers and an upper surface of the first free magnetic layer;
- and
- a pair of third antiferromagnetic layers above the second free magnetic layer in a region opposing the second antiferromagnetic layer in a thickness direction, respectively.
3 more elements
Dependencies are inferred from the claim text.