Ultra small track width thin film magnetic transducer

A multitrack thin film magnetic transducer assembly having at least two thin film transducers, each transducer comprising:

• a support member of a non-magnetic material having a planar surface;
• a plurality of first thin film conductor leads on said planar surface;
• a first thin film layer of non-magnetic electrically insulating material extending over said first conductor leads;
• a thin film magnetic core layer of generally uniform thickness superposed with said first thin film layer and in a plane parallel to said planar surface, and having the thickness defining the track width of said transducer;
• said thin film magnetic core layer being separated by a transducing gap having a predetermined length and depth, said transducing gap defining in said magnetic core layer two coplanar confronting magnetic poles having the same thickness as the thickness of said thin film magnetic core layer:
• a thin film non-magnetic material superposed with said magnetic core layer and filling said transducing gap;
• a plurality of second thin film conductor leads overlying and insulated from said magnetic core layer;
• window means in said magnetic core layer for interconnection of said first and second conductor leads to form a transducer winding;
• and
• said thin film transducers being superposed and integrally joined and having their respective transducing gaps aligned to provide a multitrack transducer assembly.

A thin film rotary scan magnetic transducer assembly having at least two thin film transducers located along a periphery of a disk shaped non-magnetic support member, each said transducer comprising:

• a generally planar thin film magnetic core layer having a generally uniform thickness defining a track width;
• said thin film magnetic core layer being separated by a transducing gap having a predetermined length and depth to define two coplanar confronting magnetic poles having the same thickness as the thickness of said thin film magnetic core layer;
• a thin film non-magnetic material superposed with said magnetic material and filling said transducing gap;
• window means formed in said magnetic core layer;
• and
• first and second pluralities of thin film conductor leads formed on opposite sides of and insulated from said magnetic core layer and having ends thereof accessible through said window means for interconnection to form a transducer winding.