Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1993-03-26

1995-03-21

Thibodeau, Paul J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428323, 428328, 428329, 428694B, 428694BB, 428694BN, B32B 302, B32B 516, G11B 566

Patent

active

053994078

ABSTRACT:
Of disk-shaped or tape-shaped magnetic recording media composed of non-magnetic supports and magnetic layers which, formed on the supports, contain a magnetic powder and a binder for it, the magnetic recording medium having superior electro-magnetic conversion characteristics, high durability, and high reliability has been obtained as a result of improving the abrasion resistance of the magnetic layer without impairing the surface smoothness thereof, by incorporating a non-magnetic inorganic powder of at least 5 Mohs hardness which has a dendrite or chain structure.

REFERENCES:
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patent: 4780365 (1988-10-01), Kakuishi
patent: 4837083 (1989-06-01), Kuroda
patent: 4917947 (1990-04-01), Kosha
Japanese Journal of Applied Physics, Supplements, vol. 24 Suppl. 24-3, 1985, Tokyo, Japan, pp. 13-16; H. Adachi et al.: "Preparation and properties of (Pb,La) T103 epitaxial thin films by multi-target sputtering", FIGS. 2, 3; table I.
Journal of Applied Physics, vol. 60, No. 8, Oct. 15, 1986, New York, U.S., pp. 2194-2919; Iijima et al: "Epitaxial growth and the crystallographic, dielectric and pyroelectric properties of lanthanum-modified lead titanate films" p. 2914, column 2, paragraph 2-p. 2915, paragraph 1; table I, p. 2915, col. 2, line 4-line 8.
Applied Physics, vol. 21, No. 4, Apr. 1989, Heidelberg DE, pp. 339-343, M. Okuyama et al.: "Epitaxial growth of ferroelectric PLZT thin films and their optical properties", p. 339, col. 2, paragraph 2-p. 340, col. 1, paragraph 2; table 2.

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