Photocuring resin composition, dry film, and print circuit board
A technology of photocurable resin and composition, applied in secondary processing of printed circuits, optics, optomechanical equipment, etc., can solve problems such as defects, and achieve the effects of reduced halogen gas generation, excellent concealment, and low halogen content
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[0115]
[0116] The varnish (A-1) obtained in the synthesis of the aforementioned carboxylic acid-containing resin and the components shown in Table 1 were kneaded at the compounding ratio shown in Table 1 with a three-roll mill to obtain a photocurable resin composition.
[0117] Table 1
[0118]
[0119]
[0120] With respect to the photocurable resin compositions of Examples 1 to 7 and Comparative Examples 1 to 2, performance and characteristics were evaluated according to the following evaluation criteria. The results are shown in Table 2.
[0121] Performance evaluation:
[0122]
[0123] The circuit pattern substrate with a copper thickness of 35μm was polished, washed with water, and dried. Then, the photocurable resin compositions of Examples 1-7 and Comparative Examples 1-2 were coated on the entire surface by a screen printing method, and heated at 80°C. Dry in a circulating drying oven for 60 minutes. After drying, use an exposure device equipped with a metal hali...
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