Magnetic recording disk

Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier

Patent

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Details

428694B, 428694BS, 428694BK, 428694BN, 428336, 428900, G11B 566

Patent

active

055499554

ABSTRACT:
A magnetic recording disk having a good overwriting characteristic and an excellent electromagnetic characteristic, as well as superior running durability. The magnetic recording disk comprises a non-magnetic support having coated thereon, in the order, a non-magnetic layer comprising mainly a non-magnetic powder and a binder resin and a magnetic layer comprising mainly a ferromagnetic powder and a binder resin, wherein the magnetic layer is formed by applying a magnetic layer coating solution onto the coated non-magnetic layer while the non-magnetic layer remains in a wet condition, the average thickness of the magnetic layer is 0.5 .mu.m or less, and the maximum thickness and the minimum thickness thereof fall within the range of .+-.15% of the average thickness of the magnetic layer.

REFERENCES:
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patent: 4746558 (1988-05-01), Shimozawa et al.
patent: 4788092 (1988-11-01), Chubachi et al.
patent: 4895758 (1990-01-01), Sakemoto et al.
patent: 4975322 (1990-12-01), Hideyama et al.
patent: 5079096 (1992-01-01), Miyake et al.
patent: 5151323 (1992-09-01), Kawahara

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