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Browse Prior Art Database

NEW PLANAR HEAD LAYOUT

IP.com Disclosure Number: IPCOM000013415D
Original Publication Date: 1999-Sep-01
Included in the Prior Art Database: 2003-Jun-18
Document File: 1 page(s) / 58K

Publishing Venue

IBM

Abstract

The disclosed planar head layout eliminates the disadvantage of prior planar head designs by minimizing the distance from the gap to the trailing edge of the slider. This is important for head performance because it reduces the gap fly height sensitivity to variations in pitch angle. Variation in gap fly height causes variations in written and read-back signals. Prior planar head designs have the coils and pole tips laid out in two symmetric halves. The turns of the coil are equally distributed about upright magnetic columns known as "pillars". The pillars and coils are centered about the gap. The disadvantage to this symmetry is that the gap can be no closer to the trailing edge of the slider than dimension "A", which is restricted by the coil size. The embodied new layout reduces dimension "A" to a new dimension "a" by eliminating the coil symmetry. All of the coil would be wound around one pillar. Coils Gap Trailing Edge A a

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NEW PLANAR HEAD LAYOUT

   The disclosed planar head layout eliminates the disadvantage of prior planar head designs by minimizing the distance from the gap to the trailing edge of the slider. This is important for head performance because it reduces the gap fly height sensitivity to variations in pitch angle. Variation in gap fly height causes variations in written and read-back signals.

Prior planar head designs have the coils and pole tips laid out in two symmetric halves. The turns of the coil are equally distributed about upright magnetic columns known as "pillars". The pillars and coils are centered about the gap. The disadvantage to this symmetry is that the gap can be no closer to the trailing edge of the slider than dimension "A", which is restricted by the coil size. The embodied new layout reduces dimension "A" to a new dimension "a" by eliminating the coil symmetry. All of the coil would be wound around one pillar.

Coils

GapTrailing Edge A a

Pillars

View B

View A

Prior Art New Art

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