Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1992-09-21
1994-07-12
Ryan, Patrick J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428901, 430308, B32B 900
Patent
active
053287525
ABSTRACT:
The instant invention discloses a process for producing a substrate for use in printed circuit which comprises: a vessel for containing a photo-curable resin; a masking means positioned above and in close proximity to the resin surface; a planar light for irradiating through the mask a thin layer of the photo-curable resin, means for moving the thin-layered cured product in the vertical direction, means for coating additional uncured resin on the cured product and irradiating the same to form a newly formed thin-layered cured product thereon, and means for successively coating and forming additional thin-layers of cured products. The second aspect of this invention relates to a substrate for use in printed circuit boards produced by the above-mentioned process and apparatus.
REFERENCES:
patent: 4216287 (1980-08-01), Sano et al.
patent: 4288529 (1981-09-01), Sano et al.
patent: 4506004 (1985-03-01), Sullivan
patent: 4849321 (1989-07-01), Hung et al.
Lee Kam F.
Nitto Boseki Co. Ltd.
Ryan Patrick J.
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