Claims
- 1. A glide head for detecting asperities on a disc, the glide head comprising:
a glide slider comprising:
a glide slider body having a leading edge, a trailing edge, and a bottom surface therebetween which is centered along a longitudinal axis extending between the leading and trailing edges; an inside rail disposed on the bottom surface of the glide slider body on a first side of the longitudinal axis and extending from the leading edge to the trailing edge; and an outside rail disposed on the bottom surface of the glide slider body on a second side of the longitudinal axis, the outside rail extending from the leading edge to the trailing edge, the inside and outside rails being substantially equidistant from the longitudinal axis at the bottom surface; wherein the outside rail is positioned lower than the inside rail such that a bottom surface of the outside rail extends further from a point on the longitudinal axis on the trailing edge than does a bottom surface of the inside rail.
- 2. The apparatus of claim 1 wherein the bottom surface of the outside rail includes a pad positioned toward the trailing edge of the slider body.
- 3. The apparatus of claim 2 wherein the pad is rectangular.
- 4. The apparatus of claim 2 wherein the pad has a thickness of about 0.4 micro-inches.
- 5. The apparatus of claim 2 wherein the pad is a diamond-like carbon (DLC) pad.
- 6. The apparatus of claim 1 wherein the inside rail includes a taper toward the trailing edge of the slider body.
- 7. The apparatus of claim 6 wherein the taper has a length of about 2 mils.
- 8. The apparatus of claim 1 wherein the slider body includes a twist that positions the outside rail lower than the inside rail.
- 9. The apparatus of claim 8 wherein the twist positions the outside rail about 0.4 micro-inches lower than the inside rail.
- 10. A method for producing a glide head for detecting asperities on a disc, the method comprising:
(a) providing a glide slider including a glide slider body having a leading edge, a trailing edge, and a bottom surface therebetween which is centered along a longitudinal axis that extends between the leading and trailing edges; (b) forming an inside rail on the bottom surface of the slider body on a first side of the longitudinal axis, the inside rail extending from the leading edge to the trailing edge; and (c) forming an outside rail on the bottom surface of the slider body on a second side of the longitudinal axis, the outside rail extending from the leading edge to the trailing edge, the inside and outside rails being substantially equidistant from the longitudinal axis at the bottom surface; wherein the outside rail is formed lower than the inside rail such that a bottom surface of the outside rail extends further from a point on the longitudinal axis on the trailing edge than does a bottom surface of the inside rail.
- 11. The method of claim 10 wherein forming the outside rail step (c) further includes forming a pad on the bottom surface of the outside rail toward the trailing edge of the slider body.
- 12. The method of claim 11 wherein forming the pad further includes forming a rectangular pad.
- 13. The method of claim 11 wherein forming the pad includes forming the pad to be about 0.4 micro-inches thick.
- 14. The method of claim 11 wherein forming the pad includes forming the pad from diamond-like carbon (DLC).
- 15. The method of claim 11 wherein forming the pad includes forming the pad by using one of plasma chemical vapor deposition, sputtering and vacuum metallization.
- 16. The method of claim 10 wherein forming inside rail step (b) further includes forming a taper toward the trailing edge of the slider body.
- 17. The method of claim 16 wherein forming the taper includes forming the taper using ion milling.
- 18. The method of claim 16 wherein forming the taper includes forming the taper to be about 2 mils in length.
- 19. The method of claim 10 wherein providing the glide slider step (a) further includes fabricating the glide slider with a twist that positions the outside rail lower than the inside rail.
- 20. A glide head for detecting asperities on a disc surface, the glide head comprising:
a glide slider including a glide slider body having a leading edge, a trailing edge and a bottom surface therebetween which is centered along a longitudinal axis that extends between the leading and trailing edges, wherein an inside rail is disposed on the bottom surface of the glide slider body on a first side of the longitudinal axis, the inside rail extends from the leading edge to the trailing edge; and an outside rail means for testing an outermost portion of the disc surface without losing lift needed to balance the glide slider over the disc surface.
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims priority to U.S. Provisional Application No. 60/254,259, filed Dec. 8, 2000 and entitled “OUTER RAIL ACTIVE GLIDE HEAD” incorporated herein by reference.
Provisional Applications (1)
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Number |
Date |
Country |
|
60254259 |
Dec 2000 |
US |