Fabrication of diffractive subtractive filter embossing master

Details Fabrication of diffractive subtractive filter embossing master Fabrication of diffractive subtractive filter embossing master

1977-03-25

1978-08-22

Kimlin, Edward C.

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

96 36, 96 383, G03C 500

Patent

active

041086600

ABSTRACT:
A recording blank, composed of at least one diffraction grating substrate, such as nickel, covered with a layer of photoresist is used to produce an embossing master by exposing the photoresist to picture information composed of respective white and non-white manifesting regions; developing the exposed photoresist to reveal the grating portions underlying solely the white manifesting regions; electroplating and/or etching the revealed portions to level and obliterate the revealed grating portions, and then removing the remainder of the photoresist.

REFERENCES:
patent: 3669673 (1972-06-01), Ih
patent: 3832176 (1974-08-01), Verstraete et al.
patent: 3894179 (1975-07-01), Jacobs et al.

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