Resist material and pattern forming method using same
View Patent ↗In one embodiment, a resist material to be used in an imprint process includes a diluent monomer having a hydroxyl group and at least one functional group selected from a vinyl ether group, an epoxy group and an oxetanyl group. The material further includes a dendrimer having at least two reactive groups for photo-cationic polymerization. The material further includes a photo-acid generator as a polymerization initiator.
1. A pattern forming method comprising:
providing, on a substrate, a resist material which comprises a diluent monomer having a hydroxyl group and at least one functional group selected from a vinyl ether group, an epoxy group and an oxetanyl group, a dendrimer with a globular structure having at least two reactive groups for photo-cationic polymerization, and a photo-acid generator as a polymerization initiator;
imprinting a template having concave-convex shape patterns against the resist material;
curing the resist material; and
releasing the template from the cured resist material.
2. The method of claim 1 , wherein the resist material comprises:
50% or more and 90% or less by weight of the diluent monomer;
5% or more and 50% or less by weight of the dendrimer; and
0.3% or more and 10% or less by weight of the polymerization initiator.
3. The method of claim 1 , wherein the dendrimer has a vinyl ether group, an epoxy group or an oxetanyl group as the reactive groups for photo-cationic polymerization.
4. The method of claim 1 , wherein the resist material is provided on an adhesion film on the substrate.
5. The method of claim 1 , wherein the resist material is cured by irradiating the resist material with an ultraviolet ray.