| 摘要 |
PROBLEM TO BE SOLVED: To form an etching corrosion resistant resin layer which does not cause strains and torsion phenomena in a metallic sheet in secondary etching and film removal treatment steps, to obtain a resin composition used for forming the etching corrosion resistant resin layer and to produce a long hole type (aperture grill type) shadow mask. SOLUTION: This resin composition consists of 20-40 wt.% acrylic compound having an alcoholic hydroxyl group, 20-40 wt.% reactive unsaturated compound of a polybasic acid having two or more carboxyl groups, a polyhydric alcohol and (meth)acrylic acid, 5-20 wt.% reactive unsaturated compound of an epoxy resin having alicyclic epoxy groups and (meth)acrylic acid and 1-5 wt.% photopolymerization initiator. The smaller hole opening pattern 5 side of a metal sheet 1 after primary etching is coated with the resin composition, and this composition is dried to form the objective etching corrosion resistant resin layer 7. The metal sheet 1 is then subjected to secondary etching, and film removal treatment is carried out to produce a shadow mask. |
