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US 8,136,227 B2Granted
Method for making a magnetic head having a non-GMR shunt
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorsMichael Feldbaum, Quang Le, Edward H. Lee, Neil L. Robertson, Charles G. Seegel, III
Life of this patent
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Abstract
A magnetic head having non-GMR shunt for perpendicular recording and method for making magnetic head having non-GMR shunt for perpendicular recording is disclosed. A shunt is provided for shunting charge from a read sensor. The shunt is formed co-planar with the read sensor and is fabricated using non-GMR materials.
Claims9
A method for making a magnetic head having non-GMR shunt for perpendicular recording, comprising:
- forming a read head including a magnetic reading sensor disposed between a first and second shield;
- depositing over only a portion of the magnetic reading sensor a photoresist layer having a shape selected for exposing a portion of the magnetic reading sensor to form a shunt within the magnetic reading sensor and between the first and second shield to prevent charge buildup between the first and second shield;
- removing the portion of the magnetic reading sensor exposed by the photoresist layer to form a void in the magnetic reading sensor directly behind a portion of the magnetic reading sensor and between side portions of the magnetic reading sensor to produce the shape selected for forming the shunt;
- refilling the void with a non-GMR material to form the shunt circumscribing a back and the sides of the magnetic reading sensor;
- removing the photoresist layer;
- and
- forming leads to the magnetic reading sensor.
4 more elements
A method for making a magnetic head having non-GMR shunt for perpendicular recording, comprising:
- forming a magnetic reading sensor using GMR material;
- depositing, over only a portion of the magnetic reading sensor, a photoresist layer having a shape selected for exposing a portion of the magnetic reading sensor located proximately centrally on the magnetic reading sensor for forming a shunt within the magnetic reading sensor to prevent charge buildup between the first and second shield;
- removing material of the magnetic sensor left exposed by the photoresist layer to form a void in the magnetic reading sensor having the shape selected for forming the shunt, wherein the void is formed proximately centrally in the magnetic sensor so that the void is bounded by a front portion of the GMR material of the magnetic reading sensor, a first and second side portion of the GMR material of the magnetic reading sensor and a back portion of the GMR material of the magnetic reading sensor;
- refilling the void having the shape selected for forming the shunt with a non-GMR material;
- removing the photoresist layer;
- and
- forming leads to the magnetic reading sensor.
4 more elements
Dependencies are inferred from the claim text.