| abstract |
The purpose of the present invention is to provide: a method for producing a substrate, by which a substrate having a metal-containing layer on a surface of a metal substrate can be produced simply; a composition; and a polymer. This method for producing a substrate includes a step for coating a composition on a metal substrate and a step for forming a metal-containing layer on at least a part of the coating film formed in the coating step. The method is characterized in that the composition contains a solvent and a polymer having a first terminal structure and a second terminal structure in the same molecule, and each of the first terminal structure and the second terminal structure is selected from the group consisting of a structure represented by formula (1) and a structure represented by formula (2). In formula (1), A1 is a monovalent group containing a functional group able to chemically bond to a metal atom. In formula (2), L2 is -S-, -NR- or -NA22-. A2 and A22 are monovalent groups containing a functional group able to chemically bond to a metal atom. |