Claims
- 1. A head slider moveable relative to a storage media having a storage layer, the head slider comprising:
a slider body having a trailing edge surface and an air-bearing surface; a read head formed on the trailing edge surface, the read head comprising:
a first electrical contact layer adapted to carry a sensor current; a second electrical contact layer adapted to carry the sensor current; a read sensor having first and second major side surfaces contacting the first and second electrical contact layers, respectively, to carry the sensor current, the read sensor having a plurality of edges including a top sensor edge, a bottom sensor edge aligned with the airbearing surface to access data in the storage layer and side edges; a bias magnet having a magnetic pole spaced apart from one of the plurality of edges by a spacing, the bias magnet magnetically biasing the read sensor; wherein the first and second electrical contact layers are formed of a material that does not magnetically shield the read sensor; and wherein the sensor current in the read sensor flows perpendicularly to the first and second major side surfaces.
- 2. The head slider of claim 1 wherein the biasing magnet is disposed above the top sensor edge.
- 3. The head slider of claim 1 wherein the biasing magnet is disposed opposed to a side edge.
- 4. The head slider in claim 1 wherein the read head further comprises;
a first outer shield layer disposed between the first electrical contact layer and the slider body; and a second outer shield layer disposed over the second electrical contact layer.
- 5. The head slider of claim 4 wherein:
the first outer shield layer is spaced apart from the first electrical contact layer by a first insulating layer; and the second outer shield layer is spaced apart from the second electrical contact layer by a second insulating layer.
- 6. The head slider of claim 1 wherein the read sensor comprises a magnetoresistive sensor.
- 7. The head slider of claim 1 wherein the bias magnet comprises a permanent magnet.
- 8. The head slider of claim 1 wherein the bias magnet comprises a deposit of soft magnetic material and a magnet current conductor looped around the deposit of soft magnetic material, forming an electromagnet.
- 9. The head slider of claim 8 wherein the bias magnet has a generally polygonal form, including a main core joined to the magnet pole tip by a tapering portion.
- 10. The head slider of claim 9 wherein the tapering portion tapers incrementally into at least two increments.
- 11. The head slider of claim 1 wherein the storage media is formatted for perpendicular recording.
- 12. The head slider of claim 1 wherein the first and second electrical contact layers comprise a non-magnetic electrically conductive material.
- 13. The head slider of claim 14 wherein the first and second contact layers are comprised of a material where in a portion of the material is selected from the group consisting of alloys of Cu, Au, Ag, Rh, Cr, Ta, Ru and Al.
- 14. The head slider of claim 1 wherein the spacing is in the range of 2 to 11 nm.
- 15. The head slider of claim 1 wherein the read sensor has a stripe height in the range of 20 to 100 nm.
- 16. The head slider of claim 1 wherein the read head comprises a tunnel junction.
- 17. The head slider of claim 8 further comprising:
a current source connected to the magnet current conductor; and wherein the current source is adjusted as a factor of feedback from the read head to adjust the biasing of the read sensor.
- 18. A method of manufacturing a read head comprising the steps of:
depositing a first electrical contact layer over a trailing edge surface of a slider body;
building a read sensor having first and second major side surfaces and a bottom sensor surface on the first electrical contact layer, the read sensor being in direct contact with the first electrical layer; building a bias magnet at a spacing above a top edge of the read sensor, the bias magnet being electrically isolated from the first electrical contact layer; depositing a non-electrically conductive non magnetic material in the spacing and remaining portion of a layer defined by the bias magnet and the read sensor; and depositing a second electrical contact layer on the layer defined by the bias magnet and the read sensor, the second electrical contact layer being electrically isolated from the bias magnet, and in direct contact with the read sensor.
- 19. The method of claim 18 further comprising the steps of:
prior to depositing the first electrical contact layer, depositing a first shield layer over the trailing edge surface; following depositing the second electrical contact layer, depositing a second shield layer over the second contact layer; and wherein the first contact layer is deposited on the first shield layer.
- 20. The method of claim 18 wherein the first and second electrical contact layers are composed of non-magnetic electrically conductive materials.
- 21. A storage device comprising:
a storage means for storing data, having a read head disposed on a trailing edge of a slider body, the read head having a plurality of layers and configured to fly over the storage means, the read head comprising:
a read means for reading data stored in the storage means; biasing means for biasing the read means; a first current carrying means for carrying a current from a current source to the read means, the first current carrying means comprising a non-magnetic electrically conductive material; a second current carrying means for carrying a current from the read means to the current source, the second current carrying means comprising a non-magnetic electrically conductive material; and wherein the current flowing in the read means flows perpendicular to the layers.
- 22. The storage device of claim 21 further comprising:
a first outside shield means for shielding the read means from outside electromagnetic interference, the first outside shield means disposed between the first current carrying means and the slider body; and a second outside shield means for shielding the read means from outside electromagnetic interference, the second outside shield means disposed over the second current carrying means.
CROSS-REFERENCE TO RELATED APPLICATION
[0001] The present application is based on and claims the benefit of U.S. Provisional Application No. 60/390,168 filed on Jun. 20, 2002 for inventors Michael A. Seigler, Gregory J. Parker, Sharat Batra, Robert E. Rottmayer, Jonathan D. Hannay and Petrus A. Van der Heijden and entitled ELECTROMAGNETIC BIASED SHIELDLESS CPP READER.
Provisional Applications (1)
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Number |
Date |
Country |
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60390168 |
Jun 2002 |
US |