Methods for evaluating the effectiveness of protective overcoats

Details Methods for evaluating the effectiveness of protective overcoats Methods for evaluating the effectiveness of protective overcoats

1995-01-20

1997-08-26

Breneman, R. Bruce

Chemistry: electrical and wave energy

Processes and products

Coating, forming or etching by sputtering

20419216, 2041922, 427 8, 427 10, C23C 1434

Patent

active

056606958

ABSTRACT:
A method for manufacturing thin film magnetic media disks entailing the improvement arising from causing spaced electrical probes to engage spaced portions of an exposed outer surface of a disk overcoat layer; creating a voltage across the spaced electrodes; measuring a function of electrical resistance between the ends of the probes in engagement with the exposed outer surface of the overcoat layer; and employing this measured resistance function generally as a measure of wear properties of the overcoat layer.

REFERENCES:
patent: 5045165 (1991-09-01), Yamashita
patent: 5264797 (1993-11-01), Dahlstrom

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