A method of connecting a fine wire to an ultrafine wire, the fine wire exhibiting a first cross-section and the ultrafine wire exhibiting a second cross-section, the second cross-section smaller than the first cross-section, the method constituted of: providing an uninsulated portion of the fine wire exhibiting a flat surface; depositing a conductive material on the flat surface of the provided uninsulated portion of the fine wire; providing an uninsulated portion of the ultrafine wire; and bonding the provided uninsulated portion of the ultrafine wire to the deposited conductive material on the flat surface of the provided uninsulated portion of the fine wire by thermocompression.