Magnetoresistive head and a manufacturing method thereof

Details Magnetoresistive head and a manufacturing method thereof Magnetoresistive head and a manufacturing method thereof

2007-02-13

2010-12-28

Cao, Allen T (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

07859799

ABSTRACT:
Embodiments in accordance with the present invention reduce the influence of etching damage at junction edge of a magnetoresistive film in the sensor height direction, lower the deterioration of dielectric breakdown voltage between an upper magnetic shield layer and a lower magnetic shield layer and instability of reproducing property resulting from shield process, and maintain electrostatic capacity to a small value in a CPP magnetoresistive head. In an embodiment of a magnetoresistive head of the present invention, length in the sensor height direction of bottom surface of a pinning layer is longer than the length in the sensor height direction of bottom surface of a first ferromagnetic layer. The angle formed by an edge in the sensor height direction of the pinning layer to the surface extended from a bottom surface of a magnetoresistive film is smaller than the angle formed by an edge in the sensor height direction of a second ferromagnetic layer to the surface extended from a bottom surface of the magnetoresistive film. Height of top surface of a sensor height direction refill film is equal to or higher than the top surface of the magnetoresistive film.

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International Search Report dated Jan. 7, 2008 for the corresponding European patent application EP07250152.

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