| 摘要 |
PURPOSE: A negative type photoresist composition which has excellent dispersion ability of fine conductive powder, coating property, stability during storage, and rapid developing time in aqueous alkali solution due to its high viscosity and adhesiveness without the crystallization of macromolecular resin is provided by introducing monomers having self-plasticity. CONSTITUTION: An alkali-soluble negative type photoresist composition with high viscosity used for dispersing fine conductive powder comprises: (a) 30-70 wt% of acrylate copolymer represented by formula 1 incorporating monomers having self-plasticity; (b) 0.5-5 wt% of a photo-initiator for photopolymerization; (c) 10-30 wt% of photopolymerizable monomer; (d) 0.1-5 wt% of an antifoaming agent; (e) 0.1-2 wt% of a leveling agent; and (f) 0.05-3 wt% of a stabilizer. In formula 1, R1 is carboxylic, aromatic, C1-20 of alkyl group, or copolymer of monomers comprising hydroxy group; R2 is ethylhexyl, isobutyl, tert-butyl, octyl, 3-methoxybutyl or methoxy propylene glycol group; n1 is an integer of 8 to 40; n2 is an integer of 1 or 2. The composition has a viscosity of 10000 to 20000 and a molecular weight of 15000 to 50000.
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