Substrate for a magnetic disc and manufacture thereof

Details Substrate for a magnetic disc and manufacture thereof Substrate for a magnetic disc and manufacture thereof

1995-01-06

1996-03-19

Breneman, R. Bruce

Etching a substrate: processes

Forming or treating article containing magnetically...

216 49, 216 50, 216104, 101170, B44C 122, B41M 110

Patent

active

054997313

ABSTRACT:
The present invention relates to a process for producing a substrate for a thin film magnetic data storage disc, the process including the steps of:- (a) providing a substrate; (b) printing a masking pattern of ink dots onto at least a portion of the surface of the substrate by an offset printing process in which the ink to form the masking pattern is transferred from a printing plate to the substrate by an offset printing member and wherein on transfer from the printing plate to the offset member the ink fragments into the ink dots; and (c) etching the unmasked surface of the substrate thereby to texture the substrate surface. The present invention also relates to a substrate for a thin film magnetic data storage disc, the substrate having a roughened surface composed of peaks separated by valleys produced by preferential area etching, the peaks being grouped into a plurality of substantially circular sub-arrays with the sub-arrays forming a regular pattern.

REFERENCES:
patent: 4544443 (1985-10-01), Ohta et al.
patent: 4655876 (1987-04-01), Kawai et al.
patent: 4818648 (1989-04-01), Ohta et al.
patent: 4833001 (1989-05-01), Kijima et al.
patent: 4869778 (1989-09-01), Cote
patent: 4879457 (1989-11-01), Ludden
patent: 4983246 (1991-01-01), Bunting
patent: 4996622 (1991-02-01), Takatsuki et al.
patent: 5059279 (1991-10-01), Wilson
patent: 5070425 (1991-12-01), Inumochi
patent: 5082709 (1992-01-01), Suzuki et al.
patent: 5087481 (1992-02-01), Chen et al.
patent: 5127330 (1992-07-01), Okazaki
patent: 5131977 (1992-07-01), Morizane et al.
patent: 5166006 (1992-11-01), Lal et al.
patent: 5220725 (1993-06-01), Chan et al.
Patent Abstracts of Japan, Pub. No. JP 3281790.
Derwents Patent Abstracts, Week 8148, Abstract of JP-A-49 128 009.
Patent Abstracts of Japan, vol. 9, No. 304, Nov. 1985, Abstract of JP-A-60 136 035.
Patent Abstracts of Japan, vol. 13, No. 98, Mar. 1989, Abstract of JP 63 279 425.
Patent Abstracts of Japan, vol. 14, No. 389, Aug. 1990, Abstract of JP 2 146 109.
Patent Abstracts of Japan, vol. 13, No. 27, Jan. 1989, Abstract of JP 63 225 919.
WPI/Derwents Publications Abstracts, Section Ch, Week 7732, Abstract of JP 52 076 114, Jun., 1977.

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