Magnetic head with magnetic substrate and an enhanced poletip thereon

A magnetic head assembly comprising:

• a first bottom pole piece of a block of ferrite magnetic material with an undercoat layer thereon and a first thin film layer of a magnetically soft material formed on the undercoat layer, said undercoat layer for seperating the first thin film layer from the ferrite material, said bottom pole piece having a front edge providing a recording medium bearing surface and having a magnetic flux path through said ferrite material to said first thin film layer;
• a magnetic transducing gap of a magnetic insulating material having a front edge providing a recording medium bearing surface;
• a second top pole piece of a second thin film layer of a magnetically soft material covering the magnetic insulating material and having a front edge providing a recording medium bearing surface;
• said front edge of said first thin film layer, said magnetic insulating material, and said second thin film layer forming said magnetic transducing gap at said contact recording medium bearing surface, said second pole piece connected to said first pole piece at a back gap;
• a conductor coil on said magnetic insulating material recessed behind said front edge, formed around the back gap and magnetically activating said first and second pole pieces;
• said first thin film layer having a thickness sufficient to provide flux to write on the recording medium and extending from said front edge toward said conductor coil a distance great enough to provide write saturation of the recording medium, but less than the distance from said front edge to said conductor coil;
• a coil insulating layer recessed behind said front edge and covering said conductor coil;
• and
• a block of non-magnetic ceramic material placed adjacent said second pole piece.

An interleaved magnetic head comprising:

• a first and second module bonded together, each module having a plurality of alternating read and write transducers formed thereon, with each read and write transducer of the first module opposite each write and read transducer, respectively, of the second module, each of said write transducers including:
• a first bottom pole piece of a block of ferrite magnetic material with an undercoat layer thereon and a first thin film layer of a magnetically soft material deposited on the undercoat layer, said undercoat layer for seperating the first thin film layer from the ferrite material, said bottom pole piece having a front edge providing a recording medium bearing surface and having a magnetic flux path through said ferrite material to said first thin film layer;
• a magnetic transducing gap of a magnetic insulating material having a front edge providing a recording medium bearing surface;
• a second top pole piece of a second thin film layer of a magnetically soft material covering the magnetic insulating material and having a front edge providing a recording medium bearing surface;
• said front edge of said first thin film layer, said magnetic insulating material and said second thin film layer forming said magnetic transducing gap at said contact recording medium bearing surface, said second pole piece connected to said first pole piece at a back gap;
• a conductor coil on said magnetic insulating material recessed behind said front edge and formed around the back gap and magnetically activating said first and second pole pieces;
• said first thin film layer having a thickness sufficient to provide the flux to write on the recording medium and extending from said front edge toward said conductor coil a distance great enough to provide write saturation of the recording medium, but less than the distance from said front edge to said conductor coil;
• a coil insulating layer recessed behind said front edge and covering said conductor coil;
• a leveling layer of a non-magnetic material covering said second pole piece;
• and
• a block of non-magnetic ceramic material covering said leveling layer.

A magnetic head comprising:

• a magnetic substrate having a bearing for a recording medium contacting the magnetic head;
• a first poletip forming layer deposited on said substrate, said first pole tip layer having a bearing edge for the recording medium, said substrate and said poletip forming layer forming a first bottom pole piece with a magnetix flux path through said substrate to said first poletip layer;
• a magnetic transducing gap layer and having a bearing edge for the recording medium;
• a second top thin film pole piece covering said gap layer and having a bearing edge for the recording medium;
• said bearing edge of said first poletip forming layer, said magnetic gap layer, and said second pole piece forming a magnetic transducing gap adjacent the contact recording medium surface;
• a conductor coil on said magnetic gap layer and insulated from said first pole piece by said gap layer and from said second pole piece by an insulating material;
• a conductor coil insulating layer covering said conductor coil;
• and
• said first pole tip layer having a thickness sufficient to provide flux to write on the recording medium and extending from said bearing edge toward said conductor coil a distance great enough to provide sufficient flux to write saturate the recording medium, but less than the distance from said bearing edge to said conductor coil;
• a non-magnetic closure layer placed next to said second pole piece.