Patent ID: 7060207
Filing Date: 2006-06-13
Classification: B82Y,G11B,Y10T

Abstract:
1. A thin film magnetic head comprising a write element, wherein: said write element comprises a first magnetic film, a pole portion, a second magnetic film, a gap film, a first coil and a second coil; said first magnetic film has one flat surface; said pole portion comprises a first pole portion and a second pole portion; said first pole portion including at least one pole piece film lying on said flat surface of said first magnetic film, said at least one pole piece film having an upper end part narrowed to define a track width; said second pole portion faces said first pole portion with said gap film between them; said second magnetic film is connected to said second pole portion and is joined to said first magnetic film by a back gap portion that is recessed in the thin film magnetic head from the medium-facing surface; said first coil and said second coil surround in a spiral form said back gap portion on said flat surface of said first magnetic film, and one of said first and second coils is fitted into a space between coil turns of the other, insulated from the coil turns of the other coil and the at least one pole piece film by an insulating film, and said first and second coils are connected to each other so as to generate magnetic flux in the same direction; one of said first coil and said second coil has coil turns with generally planar side surfaces extending generally transverse to the planes of the first magnetic film and one pole piece film wherein said side surfaces have taper angles making the sectional shape of the coil turns narrower in the lower part and wider in the upper part; and upper surfaces of said first and second coils form the same plane.