Metal deforming – With 'coating' of work – Metal coating
Patent
1992-01-30
1994-08-09
Larson, Lowell A.
Metal deforming
With 'coating' of work
Metal coating
723792, 72364, B21C 2322
Patent
active
053355261
ABSTRACT:
A method for manufacturing rigid disk substrates wherein the conventional process is modified to include a hot press function performed at the end of the fabrication process. The hot press function is performed so as to produce a flat substrate by causing the blank to yield, avoiding flow of either the blank or its overlay coating. The hot press temperature is coordinated with subsequent user process thermal cycle to avoid annealing by that cycle. The platens of the hot press are renewable with exact replacement replicas of master surfaces exhibiting a precise texture pattern ranging from an exact character down to a visibly featureless surface. That precise texture is embossed into the surface of the overlay without modifying that surface's epitaxy character. The process is extended beyond what is normal, by providing compliant platens having replica faces for removing asparity defects from post memory film deposition surfaces, restoring the substrate surface character to the finished disk.
REFERENCES:
patent: 3196660 (1965-07-01), Olson
patent: 3761333 (1973-09-01), Kleinbeck et al.
patent: 3845651 (1974-11-01), Vau
patent: 3886052 (1975-05-01), Smith
patent: 3945790 (1976-03-01), Puech
patent: 4349499 (1982-09-01), Johnston
patent: 4376963 (1983-03-01), Knoop et al.
patent: 4520647 (1985-06-01), Economy
patent: 4525759 (1985-06-01), Valayil et al.
patent: 4552820 (1985-11-01), Lin et al.
patent: 4633451 (1986-12-01), Ahn et al.
patent: 4659407 (1987-04-01), Lacotte et al.
patent: 4698251 (1987-10-01), Fukuda
patent: 4711115 (1987-12-01), Sukonnik et al.
patent: 4823578 (1989-04-01), Coe et al.
patent: 4825680 (1989-05-01), Coe et al.
patent: 4829799 (1989-05-01), Coe et al.
patent: 4870524 (1989-09-01), Coe
patent: 4887179 (1989-12-01), Coe
Application of Electroforming to the Manufacture of Disk Records A. A. Max, Symposium on Electroforming ASTM Special Tech. Publ. #318 (1962).
J. R. Morrison, Disk Substrate Requirements for Future High Areal Densities Symposium on Magnetic Media Manufacturing Methods, Hawaii 1983.
A. W. Goldsteine et al. Structure of Chemically Deposited Nickel J. Electrochemical Society vol. 104, No. 2 pp. 104-110, see p. 108.
Garrison, deceased Marvin C.
Garrison, legal representative by Eleanor
Larson Lowell A.
Ley John R.
McKeon Michael J.
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