Transducer with pole tip protrusion compensation layer

Details Transducer with pole tip protrusion compensation layer Transducer with pole tip protrusion compensation layer

2006-04-18

2009-06-02

Evans, Jefferson (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

C360S294700, C360S125710, C360S125740

Reexamination Certificate

active

07542246

ABSTRACT:
A transducer for a disk drive head includes a pole tip protrusion (PTP) compensation layer disposed proximate to a write element of the head to at least partially offset the effect of pole tip protrusion. The PTP compensation layer can be above, below, or within the write element. Suitable materials for the PTP compensation layer include zirconium oxide ceramics characterized by negative coefficients of thermal expansion such as ZrMo2O8.

REFERENCES:
patent: 7102853 (2006-09-01), Macken et al.
patent: 2003/0099054 (2003-05-01), Kamijima
patent: 2003/0235014 (2003-12-01), Yamanaka et al.
patent: 2004/0188859 (2004-09-01), He
patent: 2007/0188919 (2007-08-01), Kobayashi
Balch, et al, Copper-Zirconium Tungstate Composites Exhibiting Low and Negative Thermal Expansion Influenced by Reinforcement Phase Transformations, Metallurgical and Materials Transactions, Mar. 15, 2004;,35, 3A, Research Library p. 1159.

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