Fabrication of rectangular relief profiles in photoresist

Details Fabrication of rectangular relief profiles in photoresist Fabrication of rectangular relief profiles in photoresist

1976-06-09

1978-04-04

Griffin, Donald

Photocopying

Contact printing

Multicolor printing

96 36, 350162SF, 355132, G02B 2738, G03C 504, G03B 2704, G03B 2702

Patent

active

040824535

ABSTRACT:
By providing a given thickness for a positive photoresist layer on a substrate which, if unexposed, after development has a maximum depth just equal to the sum of the individual depths of two, at least partly superimposed, rectangular relief-profile diffraction gratings in the developed photoresist layer, it is possible to make a single master recording, which can be used to provide a stamper for embossing two of the three primary colors in a single surface of a transparent plastic sheet in the fabrication of diffractive subtractive filters.

REFERENCES:
patent: 3536402 (1970-10-01), Aston
patent: 3669673 (1972-06-01), Sen Ih et al.
patent: 3697178 (1972-10-01), Douglas
patent: 3891300 (1975-06-01), Tsunoda
patent: 3892473 (1975-07-01), Ando et al.
patent: 3936301 (1976-02-01), Schneider
patent: 3945825 (1976-03-01), Gale et al.
patent: 3957354 (1976-05-01), Knop
patent: 4009939 (1977-03-01), Okano

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