PMR writer with non-conformal side gaps
View Patent ↗A perpendicular magnetic recording (PMR) writer is configured to magnetically record data on a rotatable disk surface. The PMR writer including a pole tip, side shields, an air-bearing surface (ABS) region, a yoke region comprising Silicon Dioxide (SiO2), side gaps and a plurality of throat regions. The side gaps are arranged respectively between the pole tip and the side shields and include SiO2. A side gap width of the plurality of throat regions increases with a side shield throat height above the ABS region for each of the throat regions. The side gap width has a different width variation in each of the throat regions.
1. A perpendicular magnetic recording (PMR) writer configured to magnetically record data on a rotatable disk surface, the PMR writer comprising:
a pole tip;
side shields;
an air-bearing surface (ABS) region;
a yoke region comprising Silicon Dioxide (SiO2);
side gaps, arranged respectively between the pole tip and the side shields, comprising SiO2; and
a plurality of throat regions, a side gap width increasing with a side shield throat height above the ABS region for each of the throat regions;
wherein the side gap width has a different width variation in each of the throat regions.
2. The PMR writer of claim 1 , wherein the air boring air-bearing surface region comprises Aluminum Dioxide (A12O3).
3. The PMR writer of claim 2 , wherein the yoke region is between 100 nm and 600 nm behind the ABS region.
4. The PMR writer of claim 2 , wherein the PMR writer further comprises a PMR pole layer comprising Cobalt-Iron (CoFe) or Cobalt-Nickel-Iron (CoNiFe).
5. The PMR writer of claim 1 , wherein the side shields comprise Cobalt-Iron (CoFe) or Cobalt-Nickel-Iron (CoNiFe).
6. The PMR writer of claim 1 , wherein each side gap varies in width between 10 nm and 80 nm from the ABS region to the yoke region.
7. The PMR writer of claim 1 wherein the side shields are plated over a seed layer comprising Ruthenium.
8. A hard disk drive, comprising:
a perpendicular magnetic recording (PMR) writer configured to magnetically record data on a rotatable disk surface, the PMR writer comprising:
a pole tip;
side shields;
an air-bearing surface (ABS) region;
a yoke region comprising Silicon Dioxide (SiO2);
side gaps, arranged respectively between the pole tip and the side shields, comprising SiO2; and
a plurality of throat regions, a side gap width increasing with a side shield throat height above the ABS region for each of the throat regions;
wherein the side gap width has a different width variation in each of the throat regions.
9. The hard disk drive of claim 8 , wherein the air-bearing surface region comprises Aluminum Dioxide (A12O3).
10. The hard disk drive of claim 9 , wherein the yoke region is between 100 nm and 600 nm behind the ABS region.
11. The hard disk drive of claim 9 , wherein the PMR writer further comprises a PMR pole layer comprising Cobalt-Iron (CoFe) or Cobalt-Nickel-Iron (CoNiFe).
12. The hard disk drive of claim 8 , wherein the side shields comprise Cobalt-Iron (CoFe) or Cobalt-Nickel-Iron (CoNiFe).
13. The hard disk drive of claim 8 , wherein each side gap varies in width between 10 nm and 80 nm from the ABS region to the yoke region.
14. The hard disk drive of claim 8 wherein the side shields are plated over a seed layer comprising Ruthenium.