Patent ID: 6510024
Filing Date: 2003-01-21
Classification: G11B

Abstract:
A composite magnetic head comprising:a reproducing head; and a recording head; wherein the recording head includes a lower magnetic pole, a recording gap layer, a nonmagnetic insulating layer into which a recording coil is buried, and an upper magnetic pole, said upper magnetic pole is shaped by a trimming process, said upper magnetic pole has an elongated pole in the vicinity of a floating surface, a fan-shaped portion connected to said elongated pole, and a neck height Nh greater than 0 &mgr;m and less than 3.0 &mgr;m, the neck height Nh being a height from a floating surface of said elongated pole to said fan-shaped portion, and said elongated pole has a length P1 greater than 2.5 &mgr;m and less than 4.5 &mgr;m, said pole length P1 being a magnetic pole film thickness formed by the trimming process.