Large protrusion recording head for controlled magnetic spacing recording/reading
View Patent ↗A magnetic head structure having enhanced protrusion and having a first pole structure, a second pole structure forming a yoke with the fist pole, a coil structure disposed in the yoke, and a layer of partially cured polymer operatively coupled to the yoke. Also disclosed is a magnetic head having a first pole structure, a second pole structure forming a yoke with the fist pole, a coil structure disposed in the yoke, and a layer of at least partially insulative material operatively coupled to the read and/or write head for providing enhanced protrusion, the at least partially insulative material having a coefficient of thermal expansion higher than a coefficient of thermal expansion of fully cured hard bake novalac. Further embodiments include disk drive systems having the head structures described herein.
1. A magnetic head structure having a read head and a write head, comprising:
a first pole structure;
a second pole structure forming a yoke with the first pole;
a coil structure disposed in the yoke; and
a layer of partially cured polymer operatively coupled to at least one of the read and write head.
2. The head structure as recited in claim 1 , wherein the partially cured polymer is a silicon-containing polymer.
3. The head structure as recited in claim 2 , wherein the partially cured polymer is a silsesquioxane.
4. The head structure as recited in claim 2 , wherein the partially cured polymer is selected from a group consisting of methylsilsesquioxane, hydrogen silsesquioxane, and hybrido-organo siloxane polymer.
5. The head structure as recited in claim 4 , wherein a portion of an air bearing surface of the head expands outwardly from the head greater than a protrusion of the air bearing surface in the head if hard bake novolac were used in place of the layer of partially cured polymer.
6. The head structure as recited in claim 1 , wherein the layer of partially cured polymer surrounds at least a portion of the coil structure.
7. The head structure as recited in claim 1 , wherein the layer of partially cured polymer is positioned between the coil structure and an air bearing surface of the head.
8. The head structure as recited in claim 1 , wherein the layer of partially cured polymer is positioned substantially in the yoke.
9. The head structure as recited in claim 1 , wherein the layer of partially cured polymer is positioned substantially outside the yoke.
10. The head structure as recited in claim 9 , wherein the layer of partially cured polymer is positioned between a read element of the head and the yoke.
11. The head structure as recited in claim 9 , wherein the layer of partially cured polymer is positioned adjacent to the read head of the head.
12. The head structure as recited in claim 1 , further comprising a heating element.
13. The head structure as recited in claim 1 , wherein a portion of an air bearing surface of the head expands outwardly from the head in an amount greater than a protrusion of the air bearing surface in the head if hard bake novolac were used in place of the layer of partially cured polymer.
14. The head structure as recited in claim 1 , wherein a portion of an air bearing surface of the head expands outwardly from the head in an amount greater than a protrusion of the air bearing surface in the head if alumina were used in place of the layer of partially cured polymer.
15. The head structure as recited in claim 1 , wherein the coil structure has been formed by a damascene process.
16. A magnetic head structure having a read head and a write head, comprising:
a first pole structure;
a second pole structure forming a yoke with the first pole;
a coil structure disposed in the yoke; and
a layer of polymer material operatively coupled to at least one of the read head and write head for providing enhanced protrusion, the polymer material having a coefficient of thermal expansion higher than a coefficient of thermal expansion of fully cured hard bake novalac baked for 11 hours at 225° C.
17. The head structure as recited in claim 16 , wherein the layer of polymer material is a partially cured polymer.
18. The head structure as recited in claim 16 , wherein the partially cured polymer is a silicon-containing polymer.
19. The head structure as recited in claim 18 , wherein the partially cured polymer is a silsesquioxane.
20. The head structure as recited in claim 18 , wherein the partially cured polymer is selected from a group consisting of methylsilsesquioxane, hydrogen silsesquioxane, and hybrido-organo siloxane polymer.
21. The head structure as recited in claim 16 , wherein the layer of partially cured polymer is positioned substantially in the yoke.
22. The head structure as recited in claim 16 , wherein the layer of partially cured polymer is positioned substantially outside the yoke.
23. The head structure as recited in claim 16 , further comprising a heating element operatively coupled to the yoke.
24. The head structure as recited in claim 16 , wherein a portion of an air bearing surface of the head expands outwardly from the head in an amount of greater than a protrusion of the air bearing surface in the head if hard bake novolac were used in place of the layer of partially cured polymer.
25. The head structure as recited in claim 16 , wherein a portion of an air bearing surface of the head expands outwardly from the head in an amount greater than a protrusion of the air bearing surface in the head if alumina were used in place of the layer of partially cured polymer.
26. The head structure as recited in claim 16 , wherein the coil structure has been formed by a damascene process.
27. A magnetic head structure having a read head and a write head, comprising:
a first pole structure;
a second pole structure forming a yoke with the first pole;
a coil structure disposed in the yoke; and
a layer of partially cured silicon-containing polymer operatively coupled to at least one of the read head and the write head.
28. The head structure as recited in claim 27 , wherein the partially cured polymer is a silsesquioxane.
29. The head structure as recited in claim 27 , wherein the layer of partially cured polymer is positioned substantially in the yoke.
30. The head structure as recited in claim 27 , wherein the layer of partially cured polymer is positioned substantially outside the yoke.
31. The head structure as recited in claim 27 , further comprising a heating element.
32. The head structure as recited in claim 27 , wherein a portion of an air bearing surface of the head expands outwardly from the head in an amount greater than a protrusion of the air bearing surface in the head if hard bake novolac were used in place of the layer of partially cured polymer.
33. The head structure as recited in claim 27 , wherein the coil structure has been formed by a damascene process.
34. A magnetic storage system, comprising:
magnetic media;
at least one head structure as recited in claim 1 ;
a slider for supporting the at least one head; and
a control unit coupled to the head for controlling operation of the head.
35. A magnetic storage system, comprising:
magnetic media;
at least one head structure as recited in claim 16 ;
a slider for supporting the at least one head; and
a control unit coupled to the head for controlling operation of the head.
36. A magnetic storage system, comprising:
magnetic media;
at least one head structure as recited in claim 27 ;
a slider for supporting the at least one head; and
a control unit coupled to the head for controlling operation of the head.