Method for fabricating a CPP magnetic transducer using...

Details Method for fabricating a CPP magnetic transducer using... Method for fabricating a CPP magnetic transducer using...

2007-07-03

2007-07-03

Kim, Paul D (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C029S603070, C029S603150, C029S603160, C029S603180, C216S022000, C216S065000, C360S122000, C360S125330, C360S317000, C360S324110, C427S127000, C427S128000, C451S005000, C451S029000, C451S041000, C451S057000, C451S060000

Reexamination Certificate

active

10909121

ABSTRACT:
A method is described which uses a CMP resistant metal layer to replace the upper dielectric layer in the track width definition phase of a TMR or CPP spin valve magnetic head. The metal which is selected to be resistant to the CMP process can be rhodium (Rh), platinum (Pt), chromium (Cr), vanadium (V), etc. The additional CMP resistance of the refill layer structure provides a much larger processing window which results in higher yields. A CPP head according to the invention has a metal layer according to the invention above the hard bias structures on the sides of the sensor which define the track width.

REFERENCES:
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patent: 2003/0219626 (2003-11-01), Partee
Spallas, et al., “Perpendicular current giant magnetoresistance in 0.4 micron diameter Co-Cu multilayer sensors”, IEEE Trans. Magnetics, vol. 32, No. 5, Sep. 1996, pp. 4710-4712.

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