Thin film head on ferrite substrate with inclined top pole

Claim 2

A thin film magnetic transducer comprising: a magnetic substrate; a bottom pole piece deposited upon the magnetic substrate and having a bottom pole tip; a gap layer deposited on the bottom pole piece; an insulating layer deposited on most of the gap layer over the bottom pole piece; a top pole piece over the bottom pole piece and having a top pole tip, wherein only the gap layer separates the bottom pole tip from the top pole tip and said gap layer is sandwiched between the top pole tip and the bottom pole tip, and the insulating layer separates a portion of the top pole piece from a portion of the bottom pole piece, the top and bottom pole pieces defining a high permeability magnetic flux path with a magnetic flux gap between the top pole tip and the bottom pole tip, the magnetic flux gap being defined by the top and bottom pole tips and the gap layer whereby the magnetic flux gap is formed only across the gap layer; and a plurality of conductors between the top pole piece and the bottom pole piece which are embedded in the insulating layer whereby the conductors are separated from the bottom pole piece and the top pole piece by the insulating layer and completely surrounded by the insulating layer.

Claim 3

The thin film magnetic transducer of claim 1 wherein the magnetic substrate comprises a ferrite material.

Claim 4

The thin film magnetic transducer of claim 1 wherein a surface of the magnetic substrate defines a substrate plane, the top pole tip includes a top pole tip face and the bottom pole tip includes a bottom pole tip face, top and bottom pole tip faces defining a transducing plane generally perpendicular to the substrate plane for reading and writing information on a magnetic medium, wherein the top pole has atop pole take-off angle between the transducing plane and an outer surface of the top pole which is inclined; the top pole take-off angle being substantially greater than 0° and less than about 60°.

Claim 5

A thin film magnetic transducer comprising: a substrate; a bottom pole piece deposited upon the substrate and having a bottom pole tip; a gap layer deposited on the bottom pole piece; a top pole piece over the bottom pole piece and having a top pole tip, wherein only the gap layer separates the bottom pole tip from the top pole tip and said gap layer is sandwiched between the top pole tip and the bottom pole tip, the top and bottom pole pieces defining a high permeability magnetic flux path with a magnetic flux gap between the top pole tip and the bottom pole tip, the magnetic flux gap being defined by the top and bottom pole tips and the gap layer whereby the magnetic flux gap is formed only across the magnetic flux gap layer; an insulating layer between the bottom pole piece and the top pole piece wherein the insulating layer separates a portion of the top pole piece from a portion of the bottom pole piece; a plurality of first conductors between the top pole piece and the bottom pole piece which are embedded in the insulating layer and form a conductive coil, whereby the plurality of first conductors are separated from the bottom pole piece and the top pole piece by the insulating layer and completely surrounded by the insulating layer; a plurality of second conductors between the top pole piece and the bottom pole piece which are embedded in the insulating layer and form a conductive coil, whereby the plurality of second conductors are separated from the bottom pole piece and the top pole piece by the insulating layer and completely surrounded by the insulating layer; and wherein the insulating layer comprises: a first layer deposited on most of the gap layer over the bottom pole piece, wherein the plurality of first conductors are carried on the first layer; a second layer deposited on the first layer, wherein the plurality of first conductors extend through the second layer and the plurality of second conductors are carried on the second layer, the second layer forming a first tier with the first layer; a third layer deposited on the second layer, wherein the plurality of second conductors extend through the third layer, the third layer forming a second tier with the second layer; and a fourth layer deposited on the third layer adjacent the top pole piece and on the first and second tiers, wherein a portion of the fourth layer defines atop pole take-off angle based upon the first and second tiers.

Claim 6

A thin film magnetic transducer comprising: a substrate; a bottom pole piece deposited upon the substrate and having a bottom pole tip; a gap layer deposited on the bottom pole piece; a top pole piece over the bottom pole piece and having a top pole tip, wherein only the gap layer separates the bottom pole tip from the top pole tip and said gap layer is sandwiched between the top pole tip and the bottom pole tip, the top and bottom pole pieces defining a high permeability magnetic flux path with a magnetic flux gap between the top pole tip and the bottom pole tip, the magnetic flux gap being defined by the top and bottom pole tips and the gap layer whereby the magnetic flux gap is formed only across the magnetic flux gap layer; an insulating layer between the bottom pole piece and the top pole piece wherein the insulating layer separates a portion of the top pole piece from a portion of the bottom pole piece; a plurality of first conductors between the top pole piece and the bottom pole piece which are embedded in the insulating layer and form a conductive coil, whereby the plurality of first conductors are separated from the bottom pole piece and the top pole piece by the insulating layer and completely surrounded by the insulating layer; a plurality of second conductors between the top pole piece and the bottom pole piece which are embedded in the insulating layer and form a conductive coil, whereby the plurality of second conductors are separated from the bottom pole piece and the top pole piece by the insulating layer and completely surrounded by the insulating layer; and wherein the insulating layer comprises: a first layer deposited on most of the gap layer over the bottom pole piece, wherein the plurality of first conductors are carried on the first layer; a second layer deposited on the first layer, wherein the plurality of first conductors extend through the second layer and the plurality of second conductors are carried on the second layer, the second layer forming a first tier with the first layer; a third layer deposited on the second layer, wherein the plurality of second conductors extend through the third layer, the third layer forming a second tier with the second layer; and a fourth layer deposited on the third layer adjacent the top pole piece and on the first and second tiers, wherein a portion of the fourth layer defines atop pole take-off angle based upon the first and second tiers.

Claim 7

The thin film magnetic transducer of claim 4 wherein the substrate comprises a magnetic substrate.

Claim 8

The thin film magnetic transducer of claim 5 wherein the magnetic substrate comprises a ferrite material.

Claim 9

A thin film magnetic transducer comprising: a magnetic substrate; a bottom pole tip over only part of the magnetic substrate; a top pole piece over the magnetic substrate and having a top pole tip, the top pole piece, bottom pole tip, and the magnetic substrate defining a high permeability magnetic flux path with a magnetic flux gap between the top pole tip and the bottom pole tip, the magnetic flux gap being defined between the top and bottom pole tips; an insulating layer deposited between the magnetic substrate and the top pole piece wherein the insulating layer separates a portion of the top pole piece from a portion of the magnetic substrate and defines the magnetic flux gap between the top pole tip and the bottom pole tip; and a plurality of conductors between the top pole piece and the magnetic substrate which are embedded in the insulating layer, whereby the plurality of conductors are separated from the magnetic substrate and the top pole piece by the insulating layer and completely surrounded by the insulating layer.

Claim 10

A thin film magnetic transducer comprising: a magnetic substrate; a bottom pole tip over only part of the magnetic substrate; a top pole piece over the magnetic substrate and having a top pole tip, the top pole piece, bottom pole tip, and the magnetic substrate defining a high permeability magnetic flux path with a magnetic flux gap between the top pole tip and the bottom pole tip, the magnetic flux gap being defined between the top and bottom pole tips; an insulating layer deposited between the magnetic substrate and the top pole piece wherein the insulating layer separates a portion of the top pole piece from a portion of the magnetic substrate and defines the magnetic flux gap between the top pole tip and the bottom pole tip; and a plurality of conductors between the top pole piece and the magnetic substrate which are embedded in the insulating layer, whereby the plurality of conductors are separated from the magnetic substrate and the top pole piece by the insulating layer and completely surrounded by the insulating layer.

Claim 11

The thin film magnetic transducer of claim 7 wherein the magnetic substrate comprises a ferrite material.

Claim 12

The thin film magnetic transducer of claim 7 wherein a surface of the magnetic substrate defines a substrate plane, the top pole tip includes a top pole tip face and the bottom pole tip includes a bottom pole tip face, top and bottom pole tip faces defining a transducing plane generally perpendicular to the substrate plane for reading and writing information on a magnetic medium, wherein the top pole has a top pole take-off angle between the transducing plane and an outer surface of the top pole which is inclined; the top pole take-off angle being substantially greater than 0° and less than about 60°.

Claim 13

A thin film magnetic transducer comprising: a magnetic substrate; a bottom pole tip deposited upon the substrate; a top pole piece over the substrate and having a top pole tip, the top pole piece, bottom pole tip, and the substrate defining a high permeability magnetic flux path with a magnetic flux gap between the top pole tip and the bottom pole tip; an insulating layer between the substrate and the top pole piece wherein the insulating layer separates a portion of the top pole piece from a portion of the substrate and defines the magnetic flux gap between the top pole tip and the bottom pole tip; a plurality of first conductors between the top pole piece and the substrate which are embedded in the insulating layer and form a conductive coil, whereby the plurality of first conductors are separated from the bottom pole piece and the top pole piece by the insulating layer and completely surrounded by the insulating layer; a plurality of second conductors between the top pole piece and the substrate which are embedded in the insulating layer and form a conductive coil, whereby the plurality of second conductors are separated from the bottom pole piece and the top pole piece by the insulating layer and completely surrounded by the insulating layer; and wherein the insulating layer comprises: a first layer deposited adjacent the substrate, wherein the plurality of first conductors are carried on the first layer; a second layer deposited on the first layer, wherein the plurality of first conductors extend through the second layer and the plurality of second layer, the second layer forming a the second layer, the second layer forming a first tier with the first layer; a third layer deposited on the second layer, wherein the plurality of second conductors extend through the third layer, the third layer forming a second tier with the second layer; and a fourth layer deposited on the third layer adjacent the top pole tip upon the first and second tiers, wherein a portion of the fourth layer defines the magnetic flux gap between the bottom pole tip and the top pole tip and a portion of the fourth layer defines a top pole take-off angle based upon the first and second tiers.

Claim 14

A thin film magnetic transducer comprising: a magnetic substrate; a bottom pole tip deposited upon the substrate; a top pole piece over the substrate and having a top pole tip, the top pole piece, bottom pole tip, and the substrate defining a high permeability magnetic flux path with a magnetic flux gap between the top pole tip and the bottom pole tip; an insulating layer between the substrate and the top pole piece wherein the insulating layer separates a portion of the top pole piece from a portion of the substrate and defines the magnetic flux gap between the top pole tip and the bottom pole tip; a plurality of first conductors between the top pole piece and the substrate which are embedded in the insulating layer and form a conductive coil, whereby the plurality of first conductors are separated from the bottom pole piece and the top pole piece by the insulating layer and completely surrounded by the insulating layer; a plurality of second conductors between the top pole piece and the substrate which are embedded in the insulating layer and form a conductive coil, whereby the plurality of second conductors are separated from the bottom pole piece and the top pole piece by the insulating layer and completely surrounded by the insulating layer; and wherein the insulating layer comprises: a first layer deposited adjacent the substrate, wherein the plurality of first conductors are carried on the first layer; a second layer deposited on the first layer, wherein the plurality of first conductors extend through the second layer and the plurality of second layer, the second layer forming a the second layer, the second layer forming a first tier with the first layer; a third layer deposited on the second layer, wherein the plurality of second conductors extend through the third layer, the third layer forming a second tier with the second layer; and a fourth layer deposited on the third layer adjacent the top pole tip upon the first and second tiers, wherein a portion of the fourth layer defines the magnetic flux gap between the bottom pole tip and the top pole tip and a portion of the fourth layer defines a top pole take-off angle based upon the first and second tiers.

Claim 15

The thin film magnetic transducer of claim 10 wherein the magnetic substrate comprises a ferrite material.