Method and apparatus for an air bearing surface to reduce contamination due to saturation water vapor pressure in a hard disk drive

1. A method, comprising the step:

a slider operating an intake heater situated near a front edge to heat air and operating an air bearing surface within a flying height of a rotating disk surface in a hard disk drive, with said air bearing surface including a front bulwark near said front edge and a central island near a trailing edge and near a read-write head;

wherein the step of said slider operating said air bearing surface comprises the steps:

said intake heater altering a saturation water vapor pressure between said air bearing surface and said rotating disk surface in response to said air being heated;

said air bearing surface removing a front saturation water vapor pressure peak near said front bulwark of said air bearing surface; and

said air bearing surface removing a bad flow pattern area between said front bulwark and said central island near said trailing edge of said slider.

2. The method of claim 1 , wherein the step operating said slider, further comprises:

operating said slider with a compression ratio between a front height and said flying height;

wherein said front height is a distance between said front edge and said rotating disk surface;

wherein said flying height is said distance between said trailing edge and said rotating disk surface;

wherein said compression ratio is the ratio of air pressure before said front edge to said air pressure at said trailing edge; and

wherein said compression ratio is at least eight.

3. The method of claim 2 , wherein said compression ratio is at least ten.

4. The slider of claim 1 , comprising:

said air bearing surface including said front bulwark near said front edge and said central island near said trailing edge and near said read-write head;

said intake heater situated near said front edge to heat air and alter a saturation water pressure between said air bearing surface and said rotating disk surface; and

said read-write head, with said air bearing surface providing said central island near said read-write head.

5. The slider of claim 4 , wherein said air bearing surface, comprises:

first means for removing said front saturation water vapor pressure peak (MFBS) near said front bulwark (FB); and

second means for removing said bad flow pattern area (MRLP) between said front bulwark and said central island (CI).

6. The slider of claim 5 , wherein said first means for removing, comprises:

a front bulwark channel dividing said front bulwark into a first front bulwark and a second front bulwark.

7. The slider of claim 6 , wherein said front bulwark channel may be of steady depth between said first front bulwark and said second front bulwark.

8. The slider of claim 5 , wherein said second means for removing, comprises: a central fin between said front bulwark and said central island.

9. The slider of claim 8 , wherein said central fin connects to said central island.

10. A method of manufacturing said slider of claim 4 , comprising the step:

forming said air bearing surface with said central island near said trailing edge to create said slider.

11. The slider as a product of the process of claim 10 .

12. A head gimbal assembly, comprising: said slider of claim 4 .

13. The head gimbal assembly of claim 12 , further comprising: a pitch actuator mechanically coupled through a flexure finger to said slider for altering a pitch angle between said slider and said rotating disk surface.

14. A method of manufacturing said head gimbal assembly of claim 12 , comprising the step:

coupling said slider to a flexure finger to create said head gimbal assembly.

15. The head gimbal assembly as a product of the process of claim 14 .

16. A head stack assembly comprising at least one of said head gimbal assemblies of claim 12 .

17. A method of manufacturing said head stack assembly of claim 16 , comprising the step:

coupling at least one of said head gimbal assemblies to a head stack to create said head stack assembly.

18. The head stack assembly as a product of the process of claim 17 .

19. The hard disk drive comprising said head stack assembly of claim 16 .

20. The hard disk drive of claim 19 , wherein said slider is parked next to an inside diameter on said disk surface.

21. The hard disk drive of claim 19 , wherein said slider is parked on a ramp near an outside diameter of said disk surface.

22. A method of manufacturing said hard disk drive of claim 19 , comprising the step:

rotatably coupling said head stack assembly by an actuator pivot to a disk base to create said hard disk drive.

23. The hard disk drive as a product of the process of claim 22 .

24. A slider for use in a hard disk drive, comprising:

an intake heater situated near a front edge to heat air and alter a saturation water pressure between an air bearing surface and a rotating disk surface;

said air bearing surface providing a central island near a read-write head, further comprising:

a front bulwark channel dividing a front bulwark into a first front bulwark and a second front bulwark to remove a front saturation vapor pressure peak near said front bulwark, when said air bearing surface is within a flying height of a said rotating disk surface; and

a central fin between said front bulwark and said central island to remove a bad flow pattern area between said front bulwark and a said central island near a trailing edge of said slider, when said air bearing surface is within said flying height of said rotating disk surface;

wherein said flying height is at most twenty nanometers;

wherein said front bulwark is located near a said front edge of said slider; and

wherein said central island is located near said read-write head.

25. The slider of claim 24 , wherein said front bulwark channel may be of steady depth between said first front bulwark and said second front bulwark.

26. The slider of claim 24 , wherein said central fin connects to said central island.

27. A method of manufacturing said slider of claim 24 , comprising the step:

forming said air bearing surface with said central island near said trailing edge to create said slider.

28. The slider as a product of the process of claim 27 .

29. A head gimbal assembly, comprising: said slider of claim 24 .

30. The head gimbal assembly of claim 29 , further comprising: a pitch actuator mechanically coupled through a flexure finger to said slider for altering a pitch angle between said slider and said rotating disk surface.

31. A method of manufacturing said head gimbal assembly of claim 29 , comprising the step:

coupling said slider to a flexure finger to create said head gimbal assembly.

32. The head gimbal assembly as a product of the process of claim 31 .

33. A head stack assembly comprising at least one of said head gimbal assemblies of claim 29 .

34. A method of manufacturing said head stack assembly of claim 33 , comprising the step:

coupling at least one of said head gimbal assemblies to a head stack to create said head stack assembly.

35. The head stack assembly as a product of the process of claim 34 .

36. The hard disk drive comprising said head stack assembly of claim 33 .

37. The hard disk drive of claim 36 , wherein said slider is parked next to an inside diameter on said disk surface.

38. The hard disk drive of claim 36 , wherein said slider is parked on a ramp near an outside diameter of said disk surface.

39. A method of manufacturing said hard disk drive of claim 36 , comprising the step:

rotatably coupling said head stack assembly by an actuator pivot to a disk base to create said hard disk drive.

40. The hard disk drive as a product of the process of claim 39 .

41. The slider of claim 24 , wherein said flying height is at most ten nanometers.