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Magnetic recording head with contamination-trapping Chevron shaped slots on the ABS surface

IP.com Disclosure Number: IPCOM000014221D
Original Publication Date: 2001-Mar-01
Included in the Prior Art Database: 2003-Jun-19
Document File: 1 page(s) / 40K

Publishing Venue

IBM

Abstract

Disclosed is a magnetic thin film head for data recording with chevron-shaped slots immediately in front of the magnetic read/write transducer at the center pad on the air-bearing surface. The slots are designed to trap particles, disk corrosion products and other contaminants so as to stop them from reaching the transducer, thus protecting the transducer from physical and chemical damage. To minimize impact on the air-bearing surface (ABS) and for manufacturability concerns, each arm of the chevron has the dimension of 10um(micron) to 200um in length, 3um to 20um in width and 0.1um to 5um in depth. Simulation results indicate that if a two stripes chevron of this size resides entirely within the confine of the center pad, the fly height, roll and pitch angles are not affected appreciably. Therefore this design can be a straightforward add-on to any existing ABS design. The feasibility of this invention has been demonstrated by creating the chevron slots on a GMR head with a focused-ion-beam technique. When this modified head was flown on a corroded Aluminum disk, disk corrosion products were trapped by the chevron slots. Attached is the picture of such a chevron head after flying on a corroded disk, trapped debris is readily visible. The chevron shown has the dimension of 10um in width, 100um in length (each arm of the chevron) and 1.5um in depth. 1

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  Magnetic recording head with contamination-trapping Chevron shaped slots on the ABS surface

   Disclosed is a magnetic thin film head for data recording with chevron-shaped slots immediately in front of the magnetic read/write transducer at the center pad on the air-bearing surface. The slots are designed to trap particles, disk corrosion products and other contaminants so as to stop them from reaching the transducer, thus protecting the transducer from physical and chemical damage.

   To minimize impact on the air-bearing surface (ABS) and for manufacturability concerns, each arm of the chevron has the dimension of 10um(micron) to 200um in length, 3um to 20um in width and 0.1um to 5um in depth. Simulation results indicate that if a two stripes chevron of this size resides entirely within the confine of the center pad, the fly height, roll and pitch angles are not affected appreciably. Therefore this design can be a straightforward add-on to any existing ABS design.

   The feasibility of this invention has been demonstrated by creating the chevron slots on a GMR head with a focused-ion-beam technique. When this modified head was flown on a corroded Aluminum disk, disk corrosion products were trapped by the chevron slots. Attached is the picture of such a chevron head after flying on a corroded disk, trapped debris is readily visible. The chevron shown has the dimension of 10um in width, 100um in length (each arm of the chevron) and 1.5um in depth.

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