Loading patent…
AssigneesSumitomo Special Metals Co., Ltd., Denki Kagaku Dogyo Kabushiki Kaisha
InventorsMasami Yamashita, Noboru Iwato, Hideki Mine, Wada Toshiaki
Estimating the term…
A thin-film perpendicular magnetic recording and reproducing head including a magnetic member defining a return path and having a narrow groove formed in one of its principal surfaces in parallel to a sliding surface adapted to face a magnetic recording medium, a non-magnetic material filling the groove, and a multilayer film assembly formed above the groove and consisting at least of a thin-film conductor coil, an interlayer insulating film, a thick main pole film, a main pole film and a protective film formed one upon another. The magnetic member is connected to the main pole film through a via hole portion, and is exposed on the sliding surface in the vicinity of the main pole film so as to face the recording medium. A thin magnetic film serving as a magnetic shield covers the protective film and the sidewall surface of the head and is joined to the sidewall surface of the magnetic member.
In a thin-film perpendicular magnetic recording and reproducing head which includes a magnetic member that defines a return path and defines a principal surface having a groove therein and sidewall surfaces, a nonmagnetic material in said groove, and a multilayer film assembly formed above said non-magnetic material when said principal surface is vertically oriented, said multilayer film assembly comprising in sequence a thin-film conductor coil, an interlayer insulating film, a main pole film, and a protective film, said magnetic member being in contact with said main pole film by a via hole, said main pole film extending to said principal surface of said magnetic member, which defines a sliding surface of said head intended to face a magnetic recording medium, the improvement wherein a thin magnetic shield film is connected to said sidewall surfaces of said magnetic member and to said protective film near said principal surface yet spaced from said principal surface by terminal areas.
Dependencies are inferred from the claim text.