Patent ID: 7101633

Claim:
A thin film magnetic head comprising: a first magnetic thin film having a pole portion which is to be opposed to a magnetic record medium; a second magnetic thin film having a pole portion constituting an air bearing surface together with the pole portion of the first magnetic thin film, and being magnetically coupled with the first magnetic thin film at a back gap position remote from the air bearing surface; a write gap film made of a non-magnetic material and interposed between the pole portion of the first magnetic thin film and the pole portion of the second magnetic thin film at at least the air bearing surface; a thin film coil having a portion arranged between said first magnetic thin film and the second magnetic thin film in an insulated and isolated manner; and a substrate supporting said first and second magnetic thin films, write gap film and thin film coil; wherein said second magnetic thin film includes a top pole chip constituting said pole portion of the second magnetic thin film and a top pole having one end coupled with the top pole chip and the other end coupled with said first magnetic thin film at the back gap position, and said top pole chip includes an electroplated magnetic thin film made of Fe—Co alloy containing Fe by an amount of 52–86 wt %, wherein said thin film magnetic head is formed as a combination type thin film magnetic head, in which a magnetoresistive type thin film magnetic head element for reading magnetic information out of a magnetic record medium and an inductive type thin film magnetic head element for recoding the magnetic information on the magnetic record medium, and the top pole chip of said second magnetic thin film opposite to the magnetoresistive type thin film magnetic head element with respect to the write gap film is consisting of a sputtered thin film of Fe—Co alloy containing Fe by 52–86 wt % and an electroplated thin film of Fe—Co containing Fe by 52–86 wt % formed by an electroplating process using said sputtered thin film as seed layer, said sputtered thin film of Fe—Co alloy containing oxygen by an amount of 0.01–5.0 atomic % measured at a position which is substantially on an effective air bearing surface and is separated from a reference point by 25 nm, said reference point situating on a bisecting center line of a width of the pole portion as well as on a boundary surface between the second magnetic thin film and the write gap film.