Metal fusion bonding – Process – Combined
Patent
1975-09-08
1977-08-30
Jones, Jr., James L.
Metal fusion bonding
Process
Combined
96 27H, 96 383, 264 1, 350162SF, 29458, G02B 2738, B23P 324
Patent
active
040449394
ABSTRACT:
A method of producing a diffraction grating master which comprises exposing a plurality of reduced first grating patterns on a light sensitive layer in conformance with a predetermined code; processing the light sensitive layer to produce first gratings therein; exposing a plurality of reduced second grating patterns on the light sensitive layer (superimposed on the first gratings) and repeating the processing step to produce the second gratings; vacuum depositing a layer of silver on the superimposed first and second gratings; electroplating a layer of nickel on the silver layer on the superimposed gratings; separating the resulting nickel-silver layer from the light sensitive layer; and reinforcing the nickel-silver layer (formed in the pattern of the first and second gratings) for use as an embossing master. A special electroplating fixture used in the electroplating step insures that the nickel layer being deposited lies flat without "peeling".
REFERENCES:
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patent: 2875543 (1959-03-01), Sylvester et al.
patent: 3045531 (1962-07-01), Prescott
patent: 3388735 (1968-06-01), Sayce
patent: 3484154 (1969-12-01), Swing et al.
patent: 3619024 (1971-11-01), Frattarola
patent: 3917378 (1975-11-01), Gale
Horst William R.
McNaughton James L.
Mort Charles F.
Cavender J. T.
Jones Jr. James L.
NCR Corporation
Ramsey K. J.
Sessler Jr. Albert L.
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