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US 7,111,387 B2Granted
Method of manufacturing a thin film magnetic head comprising an insulating layer provided between a core and coil
AssigneeAlps Electric Co., Ltd.
InventorKiyoshi Sato
Life of this patent
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Abstract
A method of manufacturing a thin film magnetic head comprising an insulating layer provided between a core and a coil is provided. Also provided is a method for forming an inorganic insulation underlying layer and an organic insulation underlying layer on a lower core layer behind a recording region. The withstand voltage between the lower core layer and the coil layer can be improved because a coil is formed on the organic insulation underlying layer with an inorganic insulation layer disposed on the organic insulation layer.
Claims12
A method of manufacturing a thin film magnetic head comprising:
- (a) the step of forming a recording region comprising a pole layer and a gap layer on a lower core layer;
- (b) the step of forming an organic insulation underlying layer on a portion of the lower core layer, which is behind the recording region in a height direction;
- (g) the step of forming an inorganic insulation underlying layer in the region ranging from the recording region to the organic insulation underlying layer;
- (h) the step of forming a coil layer and a coil insulation layer on the inorganic insulation underlying layer so that the coil insulation layer is contained in pitch intervals of a conductor of the coil layer,
- wherein the coil insulation layer is formed by a process comprising filling the pitch intervals of the conductor of the coil layer with an organic material layer and then forming an inorganic material layer over the organic material layer in the pitch intervals of the conductor of the coil layer and the coil layer, after the coil layer and the coil insulation layer are formed,
- wherein an upper surface of the coil layer and an upper surface of the inorganic material layer of the coil insulation layer are polished so that the upper surface of the inorganic material layer of the coil insulation layer and the upper surface of the coil layer are in the same plane as a reference plane, wherein an upper surface of the recording region is the reference plane;
- and
- (d) the step of forming an insulation layer on the coil layer and the coil insulating layer, and then forming an upper core layer on the insulation layer,
- wherein after the insulation layer is formed on the coil layer and the coil insulation layer, a second coil layer is formed on the insulation layer so as to be electrically connected to the coil layer, and the upper core layer is then formed on the second coil layer with a second insulation layer provided therebetween.
6 more elements
Dependencies are inferred from the claim text.