Disk file with liquid film head-disk interface

Details Disk file with liquid film head-disk interface Disk file with liquid film head-disk interface

1991-07-02

1993-04-13

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9701, 360103, G11B 1702, G11B 560

Patent

active

052028038

ABSTRACT:
A disk file with substantially reduced head-disk spacing and corresponding improvement in recording performance uses a disk coated with a film of conventional high viscosity lubricant, a lubricant reservoir for replenishing the lubricant on the disk over the life of the file, and a transducer carrier with feet which ski on the high viscosity liquid film. The file does not include any means for recirculating the lubricant since the lubricant spins off the disk at a relatively low rate due to its high viscosity. The lubricant reservoir contains a very small amount of lubricant and thus may be maintained inside the substantially sealed disk file. In one embodiment of the invention, the sealed disk file is essentially evacuated. The operation of the disk file in a near vacuum environment is possible because, unlike conventional disk files, air is not required to support an air-bearing head-disk interface and the high vapor pressure of the relatively high molecular weight lubricant prevents its evaporation.

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IBM Technical Disclosure Bulletin, vol. 26, No. 1, Jun. 1983, p. 398 C. J. Mastrangelo, "Plasma Ash or Laser Burn Pattern of Submicron . . . ".
IBM Technical Disclosure Bulletin, vol. 28, No. 2, Jul. 1985, pp. 796-797 M. R. Lorenz, "Lubricant-Stabilizing Structure for Magnetic Disks".

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