Method of providing protection to the pole piece of a...

Metal working – Method of mechanical manufacture – Electrical device making

Reexamination Certificate

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C029S603070, C029S603130, C029S603150, C029S603160, C029S603180, C205S119000, C205S122000, C360S121000, C360S122000, C360S125330, C360S317000, C451S005000, C451S041000

Reexamination Certificate

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10825507

ABSTRACT:
A method of making a magnetic head involves providing a partially constructed magnetic head which has a top surface formed by a front P2pole tip, a back gap P2pedestal, and insulator materials disposed between the front P2pole tip and the back gap P2pedestal; forming a layer of selectively etchable materials over the top surface of the partially constructed magnetic head, the layer having a front edge that is recessed away from an air bearing surface (ABS); forming additional insulator materials over the selectively etchable material layer and over a front portion of the front P2pole tip; performing a chemical-mechanical polishing (CMP) to form a substantially coplanar top surface with the selectively etchable material layer and the additional insulator materials; etching to remove the selectively etchable material layer; and depositing yoke layer materials over the resulting structure.

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“The effect of track width and topography on composition uniformity of electroplated Permalloy in thin film heads”; Sahami, S.; Lee, H.P.E.; Magnetics, IEEE Transactions on vol. 28, Issue 5, Part 2, Sep. 1992; pp. 2103-2105.
R.T. Campbell, V. Escalante, R. Lee and J.Lo, Perfectly Aligned Pole Tips By Using Full Film P2 Process With Al2O3 Protection Layer, Research Disclosure, Apr. 1987, No. 276, Kenneth Mason Publications Ltd., England.
Yingjian Chen; Liu, F.; Stoev, K.; Xiaozhong Dang; Hua-Ching Tong; Qing He; Yiming Huai; “High-performance writer using high-moment sputtered fields in top and bottom poles”; IEEE Transactions on, vol. 38, Issue: Sep. 5, 2002.
Preliminary amendment for divisional application U.S. Appl. No. 10/156,633.

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