Patent ID: 11948608
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. An apparatus for performing operations on a magnetic recording tape, the apparatus comprising:
a magnetic head having an array of writers, each writer having a trailing pole piece positioned between a leading pole piece and an upper yoke, the trailing pole piece having a portion adjacent a write gap,
the portion of the trailing pole piece having a throat height (h1) of between about 100 and about 800 nm, and an aspect ratio of thickness/throat height (t1/h1) in a range of 0.5 and 2,
the portion of the trailing pole piece having a higher-moment region adjacent to the write gap of thickness (t2),
wherein the leading pole piece has a throat height dimension (h2) that is greater than the throat height (h1) of the trailing pole piece,
wherein the leading pole piece has a portion having a higher-moment region adjacent to the write gap of thickness (t4),
wherein the higher-moment region of the portion of the leading pole piece is formed of a material having a higher magnetic moment than the material of a remainder of the leading pole piece,
wherein t4 is greater than t2.