Method for providing a magnetic recording transducer having a hybrid moment pole
View Patent ↗A method for fabricating a magnetic transducer having an air-bearing surface (ABS) is provided. The method comprises providing an underlayer, and providing a main pole residing on the underlayer and having a front and a rear. The step of providing a main pole further includes providing a first portion having a first magnetic moment, the first portion having a front face at the ABS and terminating between the ABS and the rear of the main pole, and providing a second portion having a second magnetic moment. A part of the second portion resides on the first portion, and another part of the second portion resides between the first portion of the main pole and the rear of the main pole. The first magnetic moment is less than the second magnetic moment.
1. A method for fabricating a magnetic transducer having an air-bearing surface (ABS) comprising:
providing an underlayer;
providing a main pole residing on the underlayer and having a front and a rear,
the step of providing a main pole further including
providing a first portion having a first magnetic moment, the first portion having a front face at the ABS and terminating between the ABS and the rear of the main pole;
providing a second portion having a second magnetic moment, a part of the second portion residing on the first portion, another part of the second portion residing between the first portion of the main pole and the rear of the main pole,
the first magnetic moment being less than the second magnetic moment.
2. The method of claim 1 wherein the step of providing the first portion further includes:
depositing a first layer; and
removing a part of the first layer distal from the ABS, a remaining portion of the first layer including the first portion.
3. The method of claim 2 wherein the step of providing the second portion further includes:
depositing a second layer of material corresponding to the another part of the second portion.
4. The method of claim 3 further comprising:
depositing the part of the second portion of the main pole.
5. The method of claim 2 further comprising:
removing a portion of the underlayer to provide a trench therein, the first portion of the main pole residing between the trench and the ABS.
6. The method of claim 5 wherein the step of providing the second portion further includes:
depositing a second layer of material corresponding to the another part of the second portion.
7. The method of claim 6 wherein the step of providing the second portion further includes:
depositing an additional layer corresponding to the part of the second portion of the main pole.
8. The method of claim 1 wherein the main pole further includes:
providing at least a third portion residing on the first portion and below the part of the second portion, the third portion having at least a third magnetic moment not more than the second magnetic moment, the at least the third portion having a front at the ABS and terminating between the ABS and the rear of the main pole.
9. The method of claim 8 wherein the at least the third magnetic moment is less than the second magnetic moment and greater than the first magnetic moment.
10. The method of claim 8 wherein the step of providing the at least the third portion further includes:
providing a plurality of layers, each of the plurality of layers having a magnetic moment greater than the magnetic moment of a lower layer.
11. The method of claim 10 wherein the main pole has a thickness, the first portion and the at least the third portion together having low moment thickness of not more than one-third of the thickness.
12. The method of claim 1 wherein the providing the second portion of the main pole further includes:
removing a portion of the part of the second portion of the main pole proximate to the ABS, thereby forming a top bevel for the second portion of the main pole.