Magnetic head for perpendicular magnetic recording having a...

Details Magnetic head for perpendicular magnetic recording having a... Magnetic head for perpendicular magnetic recording having a...

2006-07-12

2009-06-23

Evans, Jefferson (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Core

C360S125230, C360S125240, C360S125580, C360S125070

Reexamination Certificate

active

07551394

ABSTRACT:
A magnetic head comprises a pole layer, a shield layer, a gap layer disposed between the pole layer and the shield layer, and a coil. The shield layer incorporates a first layer, a second layer, a third layer and a fourth layer that are disposed on the gap layer one by one. The first layer has an end face located in a medium facing surface. The second layer has: a first surface located in the medium facing surface; a second surface touching the first layer; and a third surface opposite to the second surface. The third layer touches the third surface of the second layer. An end face of each of the third and fourth layers closer to the medium facing surface is located at a distance from the medium facing surface.

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