Magnetic write head with helical coil structure using...

Details Magnetic write head with helical coil structure using... Magnetic write head with helical coil structure using...

2007-02-07

2009-12-15

Cao, Allen T (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Coil

Reexamination Certificate

active

07633711

ABSTRACT:
A magnetic write head for perpendicular magnetic recording that has a helical coil design that reduces manufacturing complexity and increases cycle time for manufacture. The write head includes a write pole and a helical write coil having upper coil portions that pass above the write pole and lower coil portions that pass below the write pole. The upper and lower coil portions are connected with another by connection studs. Whereas the upper and lower coil portions are constructed of a non-magnetic, electrically conductive material such as Cu, the connection studs are constructed of a magnetic, electrically conductive material such as NiFe. By constructing the connection studs of a magnetic material, they can be constructed in the same manufacturing steps used to manufacture various magnetic structures of the write head, such as a magnetic shaping layer and/or the back gap. This greatly simplifies the manufacture of the write head by eliminating many additional manufacturing steps that would otherwise be required to manufacture a helical coil having non-magnetic connection studs.

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