US Patent 8471388 Integrated circuit and method for fabricating the same

A method for fabricating an integrated circuit (IC) chip includes forming a metal trace having a thickness of between 5 μm and 27 μm over a semiconductor substrate, and forming a passivation layer on the metal trace, wherein the passivation layer includes a layer of silicon nitride on the metal trace and a layer of silicon oxide on the layer of silicon nitride, or includes a layer of silicon oxynitride on the metal trace and a layer of silicon oxide on the layer of silicon oxynitride.