Measuring and testing – Surface and cutting edge testing
Reexamination Certificate
2007-02-13
2007-02-13
Noland, Thomas P. (Department: 2856)
Measuring and testing
Surface and cutting edge testing
C029S593000, C029S604000, C702S113000
Reexamination Certificate
active
11050764
ABSTRACT:
In a method of evaluating surface tension of a solid body surface, selection is made of at least three liquid samples having different surface tensions, and contact angles between the respective liquid samples and the solid body surface are measured. Thereby, a correlation between cosines (Y) of the contact angles and surface tensions (X) of the liquid samples is derived as a logarithmic function. Surface tension of the solid body surface is evaluated by the use of a value of X that is calculated by substituting 1 for Y in the correlation. When evaluated by the foregoing evaluation method, a magnetic disk has a surface where the value of X, when 1 is substituted for Y, is greater than 0 and no greater than 17 mN/m.
REFERENCES:
patent: 3618374 (1971-11-01), Miller
patent: 3862491 (1975-01-01), Richardson
patent: 2004/0187565 (2004-09-01), Sutton
patent: 3825416 (1990-02-01), None
patent: 1086141 (1984-04-01), None
Hare, E. F. et al. Properties of Films of Adsorbed Fluorinated Acids, vol. 58; received Sep. 4, 1953; pp. 236-239, Naval Research Laboratory, Washington 25, DC. , Published Mar. 1954.
Hoya Corporation
Hoya Magnetics Singapore Pte. Ltd.
Noland Thomas P.
Sughrue & Mion, PLLC
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