Integrated magnetic head having alternate conducting and insulating layers within an open loop of two magnetic films

Abstract

The open-loop magnetic circuit of an integrated magnetic head for reading and/or writing is made up of two magnetic films which are joined together at one end, the other end being placed in proximity to the writing and/or reading surface and substantially at right angles thereto. In order to form the electric winding for writing and/or reading, the magnetic head comprises within said loop and in an alternate arrangement a succession of electrically conducting and electrically insulating film layers which are at least partially superposed in a direction substantially at right angles to the plane of the two magnetic films.

What we claim is: 
     
       1. An integrated magnetic head for reading and/or writing, a magnetic circuit for said head comprising an open loop of two magnetic films joined together at one end and disposed at the other end in proximity to the wiring and/or reading surface and substantially at right angles to said surface, and an electric winding for writing and/or reading within said loop comprising in an alternate arrangement a succession of electrically conducting and electrically insulating film layers at least partially superposed in a direction substantially at right angles to the plane of said magnetic films, wherein said loop has a convergent shape at the level of the opening of said open loop, wherein an electrically conducting layer having its two faces adjacent to two electrically insulating layers is level with the open end of said loop forming a gap, the other layers being set back towards the interior of said loop.  .[.2. A magnetic head according to claim 1, wherein an electrically insulating layer is level with the open end of said loop and forming a gap, the other layers being 
     
     
        set back towards the interior of said loop..]. 3. A magnetic head according to claim .[.2.]. .Iadd.1 .Iaddend.wherein said conducting layers are displaced with respect to each other towards the interior of said 
     
     
        loop. 4. A magnetic head according to claim 1, wherein said conducting layers are joined together at the rear end of said magnetic head and extend in superposed relation in the place of said head forming an 
     
     
        electrically conductive winding. 5. A magnetic head according to claim 1, 
     
     
        wherein said magnetic layers are a Fe-Ni-Cr alloy. 6. A magnetic head according to claim 1, wherein said electrically insulating layers are 
     
     
        SiO 2 . 7. A magnetic head according to claim 1, wherein said electrically conducting layers are selected a metal from a group consisting of aluminum and copper. .Iadd. 8. An integrated magnetic head for reading and/or writing, a magnetic circuit for said head comprising an open loop of two magnetic films joined together at one end and disposed at the other end in proximity to the writing and/or reading surface and substantially at right angles to said surface, and an electric winding for writing and/or reading within said loop comprising in an alternate arrangement a succession of electrically conducting and electrically insulating film layers at least partially superposed in a direction substantially at right angles to the plane of said magnetic films, wherein said loop has a convergent shape at the level of the opening of said open loop, wherein an electrically insulating layer is level with the open end of said loop forming a gap, the other layers being set back towards the interior of said loop..Iaddend.