TECHNOLOGY FOCUS - CERAMICS AND GLASS - Preferred Component: The base material comprises glass board material, silicon base material, metallic substrate, ceramic base material, and resin base material.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compound: The nitrogen-containing heterocyclic compound is an imidazole compound of formula (I), imidazole compound of formula (IIa) or (IIb), or pyridine compound of formula (III). The substituent is chosen from alkyl group, alkenyl group, alkynyl group, alkoxyl group and alkoxyl alkyl group. The imidazole compound (I) is chosen from 1-methylimidazole, 1-ethylimidazole, 1,2-dimethylimidazole, 1-ethyl-2-methylimidazole, 2-ethyl-1-methylimidazole, 1-propylimidazole, 1-isopropylimidazole, 1-butylimidazole, 1-pentylimidazole, 1-vinylimidazole and 1-allylimidazole.R1,R16=linear, branched or cyclic 1-5C hydrocarbyl;R2-R4,R6,R7,R9,R10,R11-R15,R17-R19=H, or linear, branched or cyclic 1-4C hydrocarbyl containing element other than carbon atom;andR5,R8=linear, branched or cyclic 1-5C hydrocarbyl containing elements other than carbon atom.(i) R1 is coupled with R2 or R4 to form a heterocyclic ring; (ii) R2 is coupled with R1, R3 or R4 to form ring or heterocyclic ring; (iii) The total number of carbon atoms contained in R1-R4 is 5 or less; (iv) R5 is coupled with R7 or R10 to form a heterocyclic ring; (v) R8 is coupled with R10 to form heterocyclic ring; (vi) The total number of carbon atoms contained in R5-R7, R8-R10, R11-R15 and R16-R19 are 5 or less; and (vii) R16 is coupled with R19 to form heterocyclic ring. Preferred Composition: The copper film-forming agent further contains an organic solvent or water, and a metal powder. Preferred Process: The base-material surface is subjected to hydrophilization treatment, before coating process. The heating process is performed at 130 degrees C or less in an inert gas atmosphere, preferably nitrogen atmosphere. The coating process is performed by spin coating method, dip method, spray-coating method, mist coating method, flow-coating method, curtain coating method, roll-coating method, knife coating method, blade coating method, air doctor coating method, bar-coating method, screen-printing method, gravure method, offset printing, flexographic-printing method and brush painting.