Patent ID: 6965496

Claim:
A thin film magnetic head comprising at least one writing element, said writing element including a first magnetic film, a second magnetic film, a gap film and a coil film, said first magnetic film including two notches which are separated on the same plane level and to be opposite to a magnetic recording medium and a first pole piece which includes a uniform width portion which defines a uniform track width as viewed backward from a forefront of said first pole piece to be opposite to said magnetic recording medium by the distance between said two notches, said second magnetic film including a second pole piece and being adjacent to said first pole piece via said gap film, said coil film exciting a thin film magnetic circuit comprised of said first magnetic film, said second magnetic film and said gap film, wherein in said first pole piece, if the height of said uniform width portion is defined by “TH1”, and the depth of said uniform width portion to a top surface from a base plane of said first magnetic film is defined by “ND1”, and the thickness of said gap film is defined by “WG”, the relations of TH 1 ≧4WG and ND 1 ≧4WG are satisfied.