Gradient write gap for perpendicular magnetic recording writer
View Patent ↗The present disclosure provides for a magnetic writer pole for use in a hard drive. The magnetic writer pole comprises a first bevel formed by a non-magnetic layer, the first bevel formed at a first angle and extending to a first throat height. The magnetic writer pole further comprises a second bevel formed by the non-magnetic layer and extending distally from the first bevel at a second angle that is greater than the first angle and extending to a second throat height. The magnetic writer pole further comprises a third bevel formed by the non-magnetic layer and extending distally from the second bevel at a third angle that is greater than the second angle.
1. A method for forming a magnetic recording pole comprising:
depositing a write gap layer;
depositing a gradient write gap layer, the write gap layer and the gradient write gap layer in communication with one another to form a write gap; and
shaping the gradient write gap layer such that the write gap formed by the write gap layer and the gradient write gap layer is narrower on a first end than on a second end;
depositing a non-magnetic spacer, wherein the non-magnetic spacer comprises a non-magnetic material, and wherein the write gap layer is deposited before the non-magnetic spacer is deposited,
wherein the write gap is configured to interact with an air-bearing surface on the first end and the non-magnetic spacer on the second end.
2. The method of claim 1 , wherein the non-magnetic spacer is deposited before the gradient write gap layer is deposited, the non-magnetic spacer is deposited on the write gap layer, and the gradient write gap layer is deposited on the write gap layer and the non-magnetic spacer.
3. The method of claim 1 , wherein the non-magnetic spacer is deposited after the gradient write gap layer is deposited, and the non-magnetic spacer is deposited on the gradient write gap layer.
4. The method of claim 1 , wherein the non-magnetic spacer is deposited before the write gap layer is deposited, and the write gap layer is deposited on the non-magnetic spacer.
5. The method of claim 1 , wherein the non-magnetic spacer comprises at least one of Ru or Al 2 O 3 .
6. The method of claim 1 , wherein the write gap layer is deposited using atomic layer deposition.
7. The method of claim 1 , wherein depositing the write gap layer further comprises depositing a write gap stop layer on the write gap layer, wherein the write gap stop layer protects the write gap layer.
8. The method of claim 1 , wherein the gradient write gap is deposited using fast ALD.
9. The method of claim 1 , wherein the gradient write gap comprises a non-magnetic material.
10. The method of claim 9 , wherein the gradient write gap comprises at least one of Ru or Al 2 O 3 .