Recording/reproducing separated type head with heat radiating structure
View Patent ↗An area in which an insulating film is formed over a substrate of a recording/reproducing separated type head is limited to the vicinity of a GMR film. This enables heat of Joule heating by a coil to be guided to the substrate without being obstructed by the insulating film. Electrodes, an upper shield film, a lower shield and a lower pole that are formed in-between are metallic thin films of high thermal conductivity, and accordingly have little influence. Similarly, gap films and a separation film that are positioned in-between, though they are electrically insulating films made of A1 2 O 3 , have no great influence because of their thinness. According to the invention, a rise of the head's own temperature is restrained by efficiently radiating heat generated by the head itself to the substrate. As a result, it is thereby made possible to provide a highly reliable recording/reproducing separated type head whose deformation quantity is smaller and which can avoid coming into contact with a recording medium.
1. A recording/reproducing separated type head comprising:
a magnetoresistive type head having, between a lower shield and an upper shield, provided over a substrate, a magnetoresistive film and a pair of electrodes electrically connected to the magnetoresistive film,
an inductive magnetic thin film head having, between a lower pole and an upper pole, provided over the upper shield of the magnetoresistive type head via an insulating film, a gap film and a coil via an interlayer insulator, and
an insulating film provided between said substrate and said lower shield and in the vicinity of said magnetoresistive film.
wherein said lower shield is provided on said insulating film over said substrate, and the insulating film provided over said substrate is absent in an area underneath said coil.
2. The recording/reproducing separated type head according to claim 1 , wherein:
the insulating film provided over said substrate is not more than 1 μm in thickness.
3. A recording/reproducing separated type head comprising:
a magnetoresistive type head having, between a lower shield and an upper shield, provided over a substrate, a magnetoresistive film and a pair of electrodes electrically connected to the magnetoresistive film;
an inductive magnetic thin film head having, between a lower pole and an upper pole, provided over the upper shield of the magnetoresistive type head via an insulating film, a gap film and a coil via an interlayer insulator; and
an insulating film provided between said substrate and said lower shield and in the vicinity of said magnetoresistive film; wherein the insulating film provided between said substrate and said lower shield is absent in an area underneath said coil.
4. The recording/reproducing separated type head according to claim 3 , wherein:
the insulating film provided between said substrate and said lower shield is not more than 1 μm in thickness.
5. The recording/reproducing separated type head wherein comprising:
a magnetoresistive type head having, between a lower shield and an upper shield, provided over a substrate, a magnetoresistive film and a pair of electrodes electrically connected to the magnetoresistive film;
an inductive magnetic thin film head using said upper shield of the magnetoresistive effect type head also as a lower pole and having, between the upper shield-cum-lower pole and an upper pole, a gap film and a coil via an interlayer insulator; and
an insulating film provided between said substrate and said lower shield and in the vicinity of said magnetoresistive film;
wherein said lower shield is provided over said insulating film and said insulating film is absent in an area underneath said coil.
6. The recording/reproducing separated type head according to claim 5 , wherein:
said insulating film is not more than 1 μm in thickness.
7. A recording/reproducing separated type head comprising:
a magnetoresistive type head having, between a lower shield and an upper shield, provided over a substrate, a magnetoresistive film and a pair of electrodes electrically connected to the magnetoresistive film;
an inductive magnetic thin film head using said upper shield of the magnetoresistive effect type head also as a lower pole and having, between the upper shield-cum-lower pole and an upper pole, a gap film and a coil via an interlayer insulator; and
an insulating film provided between said substrate and said lower shield and in the vicinity of said magnetoresistive film,
wherein the insulated film provided between said substrate and said lower shield is absent in an area underneath said coil.
8. The recording/reproducing separated type head according to claim 7 , wherein:
the insulating film provided between said substrate and said lower shield is not more than 1 μm in thickness.