Rigid magnetic recording disks and method of producing same

Details Rigid magnetic recording disks and method of producing same Rigid magnetic recording disks and method of producing same

1988-02-10

1989-11-21

McDowell, Robert

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

148 115Q, 228117, 428674, 428675, B32B 1520

Patent

active

048822361

ABSTRACT:
The present invention discloses a rigid magnetic recording disk and a method of making the same. The substrate is formed by metallurgically bonding at least a first and second layer of clad materials. The hardness and mechanical strength of the first layer is substantially greater than the second layer. The first layer has a thickness which is from about 0.2% to about 20% the thickness of the second layer. The unbonded surface of the first layer is substantially flat and asperity free. The second layer is less dense than the first layer. A magnetic layer is deposited on the unbonded surface of the first layer.

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Metals Handbook, 9th Edition, vol. 6, "Welding, Brazing, and Soldering", pp. 680-686.
Proceedings of the IEEE, Nov. 1986, "Thin-Film Recording Media", pp. 1526-1538.

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