Magnetic recording disk with polycyanate ester overlayer

Details Magnetic recording disk with polycyanate ester overlayer Magnetic recording disk with polycyanate ester overlayer

1998-03-30

2000-11-21

Ahmed, Sheeba

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428336, 428694TP, 428900, 560301, B32B 302, C07C26100

Patent

active

061500011

ABSTRACT:
Reactive monomers of cyanate esters are vapor deposited onto thin film disks used for magnetic recording. The monomer films are then irradiated with ultraviolet (UV) light to polymerize the deposited monomer to form a solid, robust polycyanate ester overlayer on the disk that becomes smoother, more corrosion resistant and, when lubricated, more durable than disks without the overlayer. The polycyanate ester overlayer can either replace the conventional carbon overcoat or allow a substantially thinner carbon overcoat to be used.

REFERENCES:
patent: 5763071 (1998-06-01), Chen et al.
patent: 5824427 (1998-10-01), Kobayashi et al.
T. H. Baum et al., "UV-Induced Polymerization of Chemically Bonded Lubricant Films onto Thin-Film Magnetic Recording Disks" IBM Technical Disclosure bulletin vol. 36, No. 08, Aug. 1993, p. 599.
S. L. Simon et al., "Cure Kinetics of a Thermosetting Liquid Dicyanate Ester Monomer/High-Tg Polycyanurate Material" Journal of Applied Polymer Science, vol. 47, pp. 461-485 (1993).
T. Fang et al., "Polycyanate Esters: Science and Applications" Progress in Polymer Science, vol. 20, pp. 61-118 (1995).

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