US Patent 9145503 Low temperature sintering conductive metal film and preparation method thereof

A low-temperature sintered conductive metal ink and a method for preparing the same are provided. To be specific, the preparation method includes the following steps of: preparing the conductive film or pattern by printing a conductive metal ink including metal nanocolloids, metal salts, and polymers reacted with the metal salts and preparing the metal nanocolloids (step 1); preparing a mixture by mixing the metal salts and polymers (step 2); preparing the metal ink by stirring the metal nanocolloids and the metal salt/polymer mixture prepared at steps 1 and 2 (step 3); printing the metal ink prepared at step 3 (step 4); and drying and thermally treating a product printed at step 4 (step 5).