Hitachi Global Storage Technologies Netherlands B.v.

Hgst Netherlands, B.v.

David Kaimon Lee

Edward Hin Pong Lee

Wen-Chien David Hsiao

Hugo Alberto Emilio Santini

Changqing Shi

Terence Tin-Lok Lam

Samuel Wei-san Yuan

Gautam Khera

Tom King Harris, Iii

A write head includes a first pole P1, a P1 pedestal, a first back gap layer plated on top of the first pole P1 leaving a region between the P1 pedestal and the first back gap layer for plating a coil. Further, a first insulation layer is applied on top of the P1 pedestal and the first back gap layer and the region between the P1 pedestal and the first back gap layer. The write head further includes a coil, patterned at least partially on top of the P1 pedestal and the first back gap layer and the region between the P1 pedestal and the first back gap layer, copper plated in the coil patterns, and a second insulation layer is applied to fill the spaces in between the coil turns. The resulting structure is planarized via chemical mechanical polishing.

Self-aligned coil process in magnetic recording heads

A magnetic head having improved overwrite capabilities and reduced fringing fields are described along with methods of making the same. The magnetic head has a first pole piece and a second pole piece. The first pole piece includes a first bottom pole piece layer, a pedestal portion formed over the first bottom pole piece layer, and a notched top pole portion formed over the pedestal portion. A gap layer separates the second pole piece from the notched top pole portion. The pedestal portion has a first saturation magnetization Mand the top pole portion has a second saturation magnetization Mthat is greater than the first saturation magnetization M. The top pole portion has a substantially planar top surface over which a portion of the gap layer and the second pole piece are formed.

Magnetic head having a bilayer pole tip

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San Jose, CA, United States of America

David Kaimon Lee