US Patent 7863145 Method and resulting structure using silver for LCOS devices

A method for fabricating an LCOS device. The method includes providing a semiconductor substrate and forming a plurality of MOS transistor devices formed on a portion of the semiconductor substrate. The method includes forming a first dielectric layer overlying the plurality of transistor devices and forming a first metal layer overlying the first dielectric layer. The method includes forming a second dielectric layer overlying the first metal layer and forming a plurality of pixel regions made substantially of silver bearing material overlying the second dielectric layer. In a preferred embodiment, the silver bearing material has much higher reflectivity for wavelengths of 450 nanometers and greater.