Patent classifications
H05K2203/0585
Imaging on substrates with alkaline strippable UV blocking compositions and aqueous soluble UV transparent films
Substrates, such as printed circuit boards, are coated with an aqueous alkaline developable UV photosensitive material followed by applying an aqueous soluble UV transparent film to coat the UV photosensitive material. An aqueous alkaline strippable UV blocking composition is selectively applied to the surface of the UV transparent film to function as a mask. UV light is applied to portions of the UV photosensitive material not covered by the mask. The UV blocking composition, UV transparent film and selective sections of the UV photosensitive material are simultaneously removed with an aqueous alkaline developer solution to form an image on the substrate.
Apparatus and method for forming a resist fine pattern
A method for forming a resist fine pattern uses inkjet printing for printing an ink along a path to form a resist fine pattern on a substrate having the same surface energy. The method includes an ejecting step of simultaneously discharging a photocurable resist ink and a partition-forming ink that are spaced from each other on the front side and the rear side of the path and applying the light energy to the discharged photocurable resist ink. The intensity of light is set so that, as the photocurable resist ink is semi-cured and is ejected on the substrate in a gelatinous state, the ink forms a boundary that is vertical with respect to the partition-forming ink ejected on the substrate and the spreading of the photocurable resist ink is prevented, and the photocurable resist ink is cured after both the photocurable resist ink and the partition-forming ink are completely ejected.