Recording medium, method of making, and information processing a

Details Recording medium, method of making, and information processing a Recording medium, method of making, and information processing a

1997-04-15

1999-11-16

Kiliman, Leszek

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 654, 428 655, 428141, 428336, 428463, 428694TS, 428694TP, 428694XS, 428694SG, 428694ST, 428900, G11B 566

Patent

active

059854049

ABSTRACT:
In conjunction with a recording medium for recording and reading information by utilizing the construction of AFM or STM and the polarization reversal of a ferroelectric material as well as an information processing apparatus having the recording medium, an object of the invention is to tailor the medium noiseless and sufficiently reliable to withstand repetitive data rewriting. The recording medium has a ferroelectric layer having unidirectionally oriented crystal axes on a substrate, and the ferroelectric layer has a ten point mean roughness Rz of up to 2 nm across a reference length of 500 nm over at least 80% of its surface. A protective layer or a lubricating layer may be disposed on the surface of the ferroelectric layer.

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T. Hidaka, Appl. Phys. Lett., vol. 68, No. 17, pp. 2358 & 2359, Apr. 22, 1996, "Formation and Observation of 50 NM Polarized Domains in PBZr.sub.1-x Ti.sub.x 0.sub.3 Thin Film Using Scanning Probe Microscope".
J. Appl. Phys. vol. 57, No. 5, pp. 1437-1444, Mar. 1, 1985, J. R. Matey, et al., "Scanning Capacitance Microscopy".
J. Appl. Phys. vol. 70, No. 5, pp. 2725-2733, Sep. 1, 1991, R. C. Barrett, et al., "Charge Storage in a Nitride-Oxide-Silicon Medium by Scanning Capacitance Microscopy".

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