Abstract: Provided are high-aspect ratio printable thick film metal paste compositions that can be deposited onto a substrate using, for example, screening printing techniques; and methods of preparing and using thick film printable metal pastes; and methods of screen printing of the thick film metal paste compositions onto a substrate to produce printed circuits, conductive lines or features on the substrate and/or a conductive surface on a solar cell device. Also provided are printed substrates containing an electronic feature produced by the high-aspect ratio printable thick film metal paste compositions.