Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making electrical device
Patent
1992-03-02
1995-01-24
Dote, Janis L.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making electrical device
430273, 430314, 430315, 430318, 430324, 430394, 430396, 430503, G03F 700
Patent
active
053842308
ABSTRACT:
A process for forming interconnection lines on a printed circuit board is described. The surface of a circuit board substrate is covered with a photoresist layer, and the photoresist layer in turn is covered with a halide emulsion layer. The emulsion layer is then exposed to a predetermined pattern of white light, and the image developed. The board is then exposed to UV light through the imaged emulsion layer which acts as a pattern masking selected portions of the photoresist mask. The emulsion layer is then stripped and the photoresist processed in conventional manner.
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patent: 4666818 (1987-05-01), Lake et al.
patent: 5015553 (1991-05-01), Grandmont et al.
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