Method for forming high-definition metal pattern, high-definition metal pattern, and electronic component

A method for forming a high-definition metal pattern, the method comprising the steps of:

• (1) forming a receiving layer on a substrate by coating the substrate with a resin composition, the resin composition including a urethane resin having a weight-average molecular weight of five thousand or more or a vinyl resin, and a medium;
• wherein the urethane resin includes an alicyclic structure and a hydrophilic group, the content of the alicyclic structure being 2000 to 5500 mmol/kg relative to the total amount of the urethane resin, and
• wherein the vinyl resin is produced by polymerizing a vinyl monomer mixture of 10% to 70% by mass of methyl methacrylate and 10% to 50% by mass of a (meth)acrylic acid alkyl ester including an alkyl group having 2 to 12 carbon atoms,
• (2) forming a plating-core pattern on the receiving layer by printing an ink on the receiving layer by reverse offset printing, the ink including a particle that serves as a plating core;
• and
• (3) depositing a metal on the plating-core pattern formed in the step (2) by electroless plating.