Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1978-08-28
1980-09-30
Corbin, John K.
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
350314, 427165, 427287, G03H 116
Patent
active
042252113
ABSTRACT:
A coating material such as a solution of polyvinyl butyral resin in benzene is applied to a transparent base in such a manner that the thickness thereof varies in a continuous and random manner so that concentration of light in the central area of a hologram produced using the plate is below a predetermined tolerable value.
REFERENCES:
patent: 3625729 (1971-12-01), Grabowski
patent: 3829193 (1974-08-01), Tsunoda et al.
patent: 3883232 (1975-05-01), Tsunoda
patent: 3995948 (1976-12-01), Abe et al.
Corbin John K.
Lee John D.
Ricoh & Company, Ltd.
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