Coating processes – Measuring – testing – or indicating
Reexamination Certificate
2005-07-05
2005-07-05
Resan, Stevan A. (Department: 1773)
Coating processes
Measuring, testing, or indicating
C428S690000, C427S131000, C073S074000, C422S069000
Reexamination Certificate
active
06913780
ABSTRACT:
The present invention provides a method for inspecting deposition characteristics of a deposit on the surface of a protective film predominantly containing carbon of a magnetic recording medium, which medium includes a disk and the protective film formed on the disk, the disk including a non-magnetic substrate, a non-magnetic undercoat layer, and a magnetic layer, the layers being formed on the substrate, wherein the method includes comparing a predetermined threshold with the extraction amount of an inspection gas component and/or a compound component formed so as to contain the inspection gas component, the gas component and/or the compound component being extracted with an inspection solvent after the magnetic recording medium is allowed to stand in an atmosphere of the inspection gas component; a process for producing a magnetic recording medium in which the extraction amount is equal to or greater than the threshold, the extraction amount being obtained through the inspection method; and a magnetic recording medium produced through the production process.
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Kato Junya
Suzuki Mikio
Falasco Louis
Resan Stevan A.
Showa Denko K.K.
Sughrue & Mion, PLLC
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