G - Physics – 03 – F
Patent
G - Physics
03
F
96/251, 96/77
G03F 7/16 (2006.01) G03F 7/029 (2006.01) G03F 7/20 (2006.01) H05K 3/00 (2006.01) H05K 3/06 (2006.01)
Patent
CA 1296559
ABSTRACT METHOD FOR FORMING IMAGES Images are formed by the following process: (i) a substrate is treated with a layer of a liquid composition comprising (A) a residue that is polymerisable by means of free radicals, such as an acrylic ester, (B) a radiation-activated polymerization initiator for (A), such as a metallocene or a mixture of a Group IVA metallic compound with a photoreducible dye. (C) a radiation-curable residue that is different from (A), such as an epoxide resin, and optionally (D) a radiation-activated catalyst for the cure of (C), such as an aromatic onium salt, (ii) the composition is subjected to actinic radiation having a wavelength at which the initiator (B) is activated but at which the residue (C) and/or the catalyst (D) are not substantially activated, thereby polymerising (A) such that the layer of liquid composition is solidified, but remains curable, (iii) the solidified layer is subjected in a predetermined pattern to actinic radiation having a wavelength that is shorter than that of the radiation used in stage (ii) and at which the radiation-curable residue (C) and/or the catalyst (D) is activated, such that in the exposed areas (C) is substantially cured, and (iv) removing areas of the solidified layer that have not been substantially cured.
511717
Banks Christopher Paul
Goodin Jonathan William
Irving Edward
Fetherstonhaugh & Co.
Vantico Ag
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