Thin film magnetic head
AssigneeComputer Basic Technology Research Assoc.
InventorsShinji Narishige, Tsuneo Yoshinari, Mituo Sato, Masayuki Takagi, Toshihiro Yoshida
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Abstract
A thin film magnetic head comprises an upper magnetic film and a lower magnetic film which cooperate to constitute a magnetic circuit including a magnetic gap, and a coil conductor film constituting a coil having a predetermined number of turns and extending between the upper and the lower magnetic films to intersect the magnetic circuit. The upper magnetic film is composed of a laminate constituted by magnetic thin film layers and non-magnetic thin film layers stacked alternately with each other. An electrically insulating layer formed of a photo-sensitive resin is interposed between the upper magnetic film and the coil conductor film.
Claims18
A thin film magnetic head, comprising:
- (a) a lower magnetic member;
- (b) an upper magnetic member stacked on said lower magnetic member and formed of laminate of magnetic thin film layers, each magnetic thin film layer having a thickness not higher than 0.8 .mu.m, and non-magnetic thin film layers, each non-magnetic thin film layer having a thickness in a range of 20 .ANG. to 0.04 .mu.m, the magnetic and non-magnetic thin film layers being stacked alternately with each other and having one end portion disposed in opposition to one end portion of said lower magnetic member so as to define a magnetic gap therebetween and the other end portion brought into contact with the other end portion of said lower magnetic member so as to form a magnetic circuit in cooperation with said lower magnetic member;
- (c) a coil conductor film constituting a coil of a predetermined number of turns having a portion extending between said lower magnetic member and said upper magnetic member so as to intersect said magnetic circuit;
- (d) a first electrically insulating layer interposed between said lower magnetic member and said coil conductor film;
- (e) a second electrically insulating layer interposed between said upper magnetic member and said coil conductor film and formed of a photo-sensitive resin;
- and
- (f) a gap member disposed in said magnetic gap.
Dependencies are inferred from the claim text.