Measuring and neutralizing the electrical charge at the...

Details Measuring and neutralizing the electrical charge at the... Measuring and neutralizing the electrical charge at the...

2006-04-06

2008-12-23

Bashore, Alain L (Department: 1792)

Coating processes

Magnetic base or coating

C427S130000, C360S235100

Reexamination Certificate

active

07468196

ABSTRACT:
A system and method for measuring and neutralizing the electrical charge at the interface of a magnetic head and a magnetic storage medium, such as a disk, is disclosed. A surface treatment material is applied to the magnetic head. The surface treatment material matches the medium surface material on the surface of the magnetic storage medium. The surface treatment material on the magnetic read/write head may be a fluorinated carbon, such as a Fomblin Z-derivative, perfluoro alkyl trichlorosilane, a FC-722, or a fluorinated polymer. The surface treatment material can be applied to the magnetic head by a vapor deposition process or by a liquid immersion process. The charge on the head-disk interface can be measured by applying varying external charges to the head while reading a signal previously written to the disk.

REFERENCES:
patent: 4853810 (1989-08-01), Pohl et al.
patent: 4863809 (1989-09-01), Brar et al.
patent: 5251081 (1993-10-01), Cossette et al.
patent: 6324031 (2001-11-01), Comstock et al.

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