Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1976-08-10
1978-10-17
Kendall, Ralph S.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428199, 428220, 428216, 427 96, 427 98, 427 43, 427 53, 427 56, 96 384, 174 685, H01K 318
Patent
active
041210077
ABSTRACT:
A novel printed circuit board with a circuit of high precision having a polymer coat layer between a base and a dispersion imaging material layer and a pattern circuit on undispersed portions of the dispersion imaging material layer. Such a printed circuit board is prepared by a simplified process which comprises essentially two steps, namely, exposure of the dispersion imaging material through a circuit pattern mask to obtain a pattern circuit of the unexposed portions and conductive metal plating wherein said unexposed portions are selectively deposited with the conductive metal due to the specific effect of provision of the polymer coat layer directly under the dispersion imaging material layer.
REFERENCES:
patent: 4000334 (1976-12-01), Hallman et al.
Arakawa Tatsumi
Ito Sakae
Kobayashi Hidehiko
Ohmura Kaoru
Shiga Tetsuo
Asahi Kasei Kogyo Kabushiki Kaisha
Kendall Ralph S.
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