Patent ID: 7667928
Filing Date: 2010-02-23
Classification: G11B,Y10T

Abstract:
1. A method for producing a thin-film magnetic head comprising a recording head portion configured to record magnetic information on a recording medium, the method comprising: forming bottom spacer layer pieces made of a same material as a thin-film coil and to be spotted such that upon formation of the thin-film coil both ends near an air bearing surface of a write shield layer to be formed are raised; forming a thin-film coil adapted to generate a magnetic flux; forming a magnetic pole layer, which extends from a surface toward a rear, said surface being opposite to the recording medium moving in a medium traveling direction, and which is configured to generate a magnetic field for magnetizing said recording medium in a direction orthogonal to a surface thereof on the basis of the magnetic flux generated at said thin-film coil; forming an insulating film; and forming the write shield layer on the insulating film, the write shield layer being located on a side of said magnetic pole layer in said medium traveling direction, extending from said surface opposite to the recording medium toward the rear, being isolated by a gap layer from said magnetic pole layer on a side near to said surface opposite to the recording medium and joined through a back gap to said magnetic pole layer on a side far away from said surface opposite to the recording medium, and being set with respect to a widthwise full length W lying substantially on the air bearing surface that is opposite to the recording medium such that when said full length W is trisected, a maximum thickness H