Patent ID: 7542245
Filing Date: 2009-06-02
Classification: B82Y,G11B

Abstract:
1. A composite thin-film magnetic head comprising: a substrate; a first insulation layer laminated on said substrate; a magnetoresistive effect read head element formed on said first insulation layer and provided with a lower shield layer, an upper shield layer and a magnetoresistive effect layer in which a sense current flows in a direction perpendicular to a surface of said magnetoresistive effect layer through said upper shield layer and said lower shield layer; a second insulation layer laminated on said magnetoresistive effect read head element; an inductive write head element formed on said second insulation layer and provided with a lower magnetic pole layer, a recording gap layer, an upper magnetic pole layer whose end portion is opposed to an end portion of said lower magnetic pole layer through said recording gap layer and a write coil; and a nonmagnetic conductive layer electrically connected with said lower shield layer and formed between said lower shield layer and said substrate in order to increase substantially a counter electrode area formed between said lower shield layer and said substrate, wherein a parasitic capacitance generated between said substrate and said lower shield layer is substantially equal to a parasitic capacitance generated between said upper shield layer and said lower magnetic pole layer.