Read Rite Corporation

Sean Yao

Zhupei Shi

Billy W Crue, Jr

Renuka Apparao

Vijay K Dhingra

A magnetoresistive write element having a planar coil layer between a first pole and a second pole. The magnetoresistive write element further includes a buildup insulation layer having an upper surface that is substantially coplanar with an upper surface of the first pole. Further, the planar coil layer is disposed above both the first pole and the buildup insulation layer. A method for forming a magnetoresistive write element includes providing a first pole and covering the first pole with an insulating layer. The insulating layer is then planarized, thereby exposing the first pole and defining a buildup insulation layer. This planarization also results in the formation of a substantially planar upper surface of the buildup insulation layer and a substantially planar upper surface of the first pole. More specifically, the first pole upper surface is substantially coplanar with the buildup insulation layer upper surface. The method also includes forming a write gap material layer above the insulation layer and first pole, and forming a substantially planar coil layer above said write gap material layer. In addition, a second pole is formed above the write gap material layer, with the coil layer thereby disposed between the first pole and the second pole.

Ultra small advanced write transducer and method for making same

A magnetoresistive write element having a greatly reduced stack height allowing construction of a smaller track width and tighter track width tolerances. The reduced stack height also produces improved magnetic flux flow properties in the write element leading to an improved magnetic fringing field in the write gap region The magnetoresistive write head includes an electrically conductive planar coil having a portion thereof extending between first and second poles. The first and second poles join one another to form a magnetic yoke which is closed at one end and open at the other. An insulation layer separates the coil from the first pole. Another layer of insulating material is formed into the coil, interspersed between the winds and having an upper surface which is flush with the upper surface of the coil. A thin layer of write gap material insulates the coil from the second pole. Since there is only a thin layer of write gap material between the coil and the second pole, rather than a thicker insulation layer, the topography of the second pole can be reduced. This lowers the stack height which allows the second pole to be constructed to define a smaller write gap with tighter tolerances.

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Milpitas, CA, United States of America

Sean Yao