Claims
- 1. A transducer including a return pole having a return pole tip extending to an external surface of the transducer surface, the return pole tip near the external surface having an area that is larger than a cross-sectional area of the return pole taken parallel to the external surface a distance from the external surface.
- 2. The transducer of claim 1 further including
a main pole having a main pole tip at the external surface; and a write gap between the main and return pole tips.
- 3. The transducer of claim 2 further including a back gap portion connecting the main and return poles at a back gap region.
- 4. The transducer of claim 1, wherein the external surface of the return pole tip includes a first width that is larger than a second width of the return pole at the distance from the external surface.
- 5. The transducer of claim 4, wherein the width of the return pole tapers from the first width to the second width.
- 6. The transducer of claim 4, wherein the width of the return pole tapers linearly from the first width to the second width.
- 7. The transducer of claim 4, wherein the return pole tapers non-linearly from proximate the first width to the second width.
- 8. The transducer of claim 7, wherein side of the return pole are curved.
- 9. The transducer of claim 1, wherein the return pole has a thickness that varies from the external surface to the distance from the external surface.
- 10. The transducer of claim 9, wherein the return pole tip has a first thickness that is larger than a second thickness of the return pole at the distance from the external surface.
- 11. The transducer of claim 10, wherein the thickness of the return pole tapers linearly from the first thickness to the second thickness.
- 12. The transducer of claim 10, wherein the return pole tapers non-linearly from the first thickness to the second thickness.
- 13. The transducer of claim 12, wherein the return pole curves from the external surface to the distance from the external surface.
- 14. The transducer of claim 10, wherein the return pole further includes a first layer extending from the external surface into the transducer to a back gap region; and a second layer adjoining the first layer at the external surface, wherein the first thickness is defined by at least the first and second layers.
- 15. The transducer of claim 1, wherein the return pole includes at least one of a width that varies between the external surface and the distance from the external surface, and a thickness that varies between the external surface and the distance from the external surface.
- 16. A perpendicular write head comprising:
an air-bearing surface (ABS); a main pole having a main pole tip at the ABS; a return pole having a return pole tip at the ABS; a write gap between the main and return pole tips; and a back gap portion connecting the main and return poles at a back gap region that is opposite the ABS; wherein a disc-facing surface area of the return pole tip is larger than a cross sectional area of the return pole taken parallel to the ABS at the back gap region.
- 17. The write head of claim 16, wherein the return pole includes at least one of a width that varies between the ABS and the back gap region, and a thickness that varies between the ABS and the back gap region.
- 18. The write head of claim 17, wherein the return pole tip includes a first width that is larger than a second width of the return pole at the back gap region.
- 19. The write head of claim 18, wherein the width of the return pole tapers linearly from the first width to the second width.
- 20. The write head of claim 18, wherein the width of the return pole tapers non-linearly from the first width to the second width.
- 21. The write head of claim 20, wherein the return pole includes curved sides.
- 22. The write head of claim 17, wherein the return pole tip includes a first thickness that is larger than a second thickness of the return pole at the back gap region.
- 23. The write head of claim 22, wherein the thickness of the return pole tapers linearly from the first thickness to the second thickness.
- 24. The write head of claim 22, wherein the return pole tapers non-linearly from the first thickness to the second thickness.
- 25. The write head of claim 24, wherein the return pole includes a curved bottom that extends from the ABS to the back gap region.
- 26. The write head of claim 22, wherein the return pole includes:
a first layer extending from the ABS to the back gap region; and a second layer adjoining the first layer at the ABS; wherein the first thickness is defined by at least the first and second layers.
- 27. A perpendicular write head comprising:
an air-bearing surface (ABS); a main pole having a main pole tip at the ABS; a return pole having a return pole tip at the ABS, the return pole tip having a disc-facing surface area that is larger than a cross-sectional area of the return pole taken parallel to the ABS at a back gap region that is opposite the ABS, wherein a first width of the return pole tip is larger than a second width of the return pole at the back gap region; and a write gap between the main and return pole tips.
- 28. The write head of claim 27, wherein the width of the return pole tapers linearly from the first width to the second width.
- 29. The write head of claim 27, wherein the width of the return pole tapers non-linearly from the first width to the second width.
- 30. The write head of claim 27, wherein the return pole includes a thickness that varies between the ABS and the back gap region.
- 31. The write head of claim 30, wherein the return pole includes a first thickness proximate the ABS that is larger than a second thickness at the back gap region.
- 32. The write head of claim 31, wherein the thickness of the return pole tapers linearly from the first thickness to the second thickness.
- 33. The write head of claim 31, wherein the return pole tapers non-linearly from the first thickness to the second thickness.
- 34. The write head of claim 31, wherein the return pole includes:
a first layer extending from the ABS to the back gap region; and a second layer adjoining the first layer at the ABS; wherein the first thickness is defined by at least the first and second layers.
- 35. A perpendicular write head comprising:
a main pole having a main pole tip at an air-bearing surface (ABS); first and second return poles positioned on opposing sides of the main pole, each having a return pole tip having a disc-facing surface at the ABS; and first and second back gap portions respectively connecting the first and second return poles to the main pole at a back gap region that is opposite the ABS.
- 36. The head of claim 35, wherein the disc-facing surface of at least one of the first and second return pole tips has an area that is larger than a cross-sectional area of the same return pole taken parallel to the ABS at the back gap region.
- 37. The head of claim 35, wherein at least one of the first and second return poles includes a width that varies between the ABS and the back gap region.
- 38. The head of claim 35, wherein at least one of the first and second return poles includes a thickness that varies between the ABS and the back gap region.
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application is a continuation-in-part of U.S. patent application Ser. No. 10/027,046 filed Dec. 20, 2001, and entitled “PERPENDICULAR READ/WRITE HEAD FOR USE IN A DISC DRIVE STORAGE SYSTEM”.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
10027046 |
Dec 2001 |
US |
Child |
10880808 |
Jun 2004 |
US |