thin film patterns in different portions on the second oppos› ing supporting side of the substrate, 

each of these one or more electrically-conductive silver metal-containing thin film patterns comprising: 

silver metal; 

an a-oxy carboxylate; 

a 5- or 6-membered N-heteroaromatic compound; and 

a photosensitizer that can either reduce reducible silver ion or oxidize the a-oxy carboxylate. 

17. The product article of claim 14 that is provided as a 10 wound roll of a continuous material. 

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