Making multi-layer micro-wire structure

A method of making a multi-layer micro-wire structure, comprising:

• providing a substrate having a surface;
• forming a plurality of micro-channels in the substrate;
• locating a first material composition in a first layer only in each micro-channel and not on the substrate surface by coating the first material composition over the substrate surface and micro-channels, removing the first material composition from the substrate surface and not the micro-channels, and curing the first material composition into the first layer;
• locating a second material composition different from the first material composition in a second layer different from and in contact with the first layer only in each micro-channel and not on the substrate surface by coating the second material composition over the substrate surface, first layer, and micro-channels, removing the second material composition from the substrate surface and not the micro-channels or first layer, and curing the second material composition into the second layer;
• and
• wherein:
• the first material composition in the first layer is electrically conductive and the second material composition in the second layer is electrically conductive;
• and
• the first material composition in the first layer and the second material composition in the second layer form an electrically conductive multi-layer micro-wire in each micro-channel.