Black solder resist compound and cured product thereof
A technology of solder resist and composition, applied in the field of solder resist, which can solve the problems of low exposure sensitivity and resolution, insufficient photocuring, and difficulty in obtaining high resolution, etc.
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[0097]
[0098] The varnish A obtained in the synthesis of the aforementioned carboxyl group-containing resin and the components shown in Table 1 were kneaded at the mixing ratio described in Table 1 with a three-roll mill to obtain a black solder resist composition.
[0099]
[0100] With respect to the solder resist compositions of Examples 1 to 4 and Comparative Examples 1 to 3, the performance was evaluated according to the following evaluation criteria. The results are shown in Table 2.
[0101] Performance evaluation:
[0102] (1) Color difference meter
[0103] The solder resist compositions of the above-mentioned Examples 1 to 4 and Comparative Examples 1 to 3 were respectively coated on the entire surface of the copper-clad substrate by screen printing, and dried in a hot-air circulating drying oven at 80°C for 30 minutes, and then , Using the cumulative light meter manufactured by ORC MANUFACTURINGCO., LTD., on the resist at 500mJ / cm 2 The amount of light is irradiate...
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