Magnetic recording medium and magnetic recording and reproducing apparatus

The magnetic recording medium includes: a non-magnetic support; and a magnetic layer including ferromagnetic powder, in which a difference Safter−Sbefore between a spacing Safter measured on a surface of the magnetic layer by optical interferometry after ethanol cleaning and a spacing Sbefore measur...

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Bibliographic Details
Main Author Kasada, Norihito
Format Patent
LanguageEnglish
Published 07.06.2022
Subjects
CLEANING
CLEANING IN GENERAL
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
MEASURING
MEASURING ANGLES
MEASURING AREAS
MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS
PERFORMING OPERATIONS
PHYSICS
PREVENTION OF FOULING IN GENERAL
TESTING
TRANSPORTING
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Summary:The magnetic recording medium includes: a non-magnetic support; and a magnetic layer including ferromagnetic powder, in which a difference Safter−Sbefore between a spacing Safter measured on a surface of the magnetic layer by optical interferometry after ethanol cleaning and a spacing Sbefore measured on the surface of the magnetic layer by optical interferometry before ethanol cleaning is more than 0 nm and 6.0 nm or less, and the non-magnetic support is an aromatic polyester support having a moisture absorption of 0.3% or less.
Bibliography:Application Number: US202016874170