Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1997-03-17

1999-08-17

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428212, 428694TR, 428694ST, 428694TP, 428900, 428 655, 360135, G11B 572

Patent

active

059391707

ABSTRACT:
There is provided a magnetic recording medium comprising a nonmagnetic substrate (10, 20), at least one magnetic layer (30) having an upper surface (30a), and a protection layer (40) made of zirconia and having an upper surface (40a). The upper surface (30a) has a surface roughness of 3 nm or smaller defined by maximum height (R.sub.max) while the upper surface (40a) has a surface roughness ranging from 5 nm to 60 nm. When a distance Zi indicates a degree of irregularities of the upper surface (40a) of the protection layer (40), a standard deviation of the heights Zi is 5.7 nm or smaller.

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Yufeng LI, et al.; "Effect Of Humidity On Stiction And Friction Of The Head/Disk Interface"; IEEE Transactions On Magnetics, vol. 26, No. 5, Sep. 1990; pp. 2487-2489.

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