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.
Claims39
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 the bottom thereof;
- a second antiferromagnetic layer disposed in the track width direction at each side of the multilayer laminate in the track width direction;
- and
- a second free magnetic layer from the upper surface of the second antiferromagnetic layer to the upper surface of the first free magnetic layer.
A method for manufacturing a magnetic detecting element, comprising the steps:
- (a) forming 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 the bottom thereof;
- (b) removing both sides of the multilayer laminate in the track width direction and providing a second antiferromagnetic layer on the end surfaces in the track width direction;
- and
- (c) providing a second free magnetic layer from the upper surface of the second antiferromagnetic layer to the upper surface of the first free magnetic layer.
Dependencies are inferred from the claim text.