Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2007-07-02
2010-11-30
Kim, Paul D (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S603130, C029S603140, C029S603150, C029S603180, C029S603070, C216S022000, C216S039000, C216S041000, C216S048000, C216S062000, C360S121000, C360S122000, C360S317000
Reexamination Certificate
active
07841068
ABSTRACT:
A method of fabricating a single-pole perpendicular magnetic recording head to contain a bevel angle promotion layer that facilitates the fabrication of the bevel angle in a trapezoidal main pole. The bevel angle promotion layer is made of a non-magnetic material that is softer than the material (e.g., Al2O3) that normally underlies the main pole. In one embodiment, the bevel angle promotion layer is formed between an end of the yoke and the air bearing surface (ABS), with the top surface of the bevel angle promotion layer being substantially coplanar with the top surface of the yoke. In other embodiment the bevel angle promotion layer is integrated with a leading edge taper material, which is formed of a magnetic material, to broaden the magnetic flux path between the yoke and the main pole.
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CA Okada et al., “Fabrication Process for a Trapezoidal Main Pole for Single-Pole-Type Heads”, IEE Trans. On Magnetics, vol. 38, No. 5, Sep. 2002, pp. 2249-2252.
Chen Tsung Yuan
Hsu Yimin
Liu Yinshi
Hitachi Global Storage Technologies - Netherlands B.V.
Kim Paul D
Silicon Valley Patent & Group LLP
Suryadevara Omkar
LandOfFree
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