Patent ID: 6184052
Filing Date: 2001-02-06
Classification: B81B,B81C,G01C,G01P,H01L

Abstract:
A process for manufacturing integrated sensors, particularly accelerometers and gyroscopes, comprising the steps of forming a temporary support region of sacrificial material over a semiconductor material body and a suspended structure including a tungsten region over said temporary support region and then removing said temporary support region, wherein said step of forming a suspended structure comprises the steps of:depositing a polycrystalline silicon layer over said temporary support region;depositing a tungsten layer over said polycrystalline silicon layer;depositing a first silicon carbide layer over said tungsten layer;defining said suspended structure by selectively removing said silicon carbide, tungsten and polycrystalline silicon layers; andforming spacer elements of silicon carbide laterally with respect to uncovered ends of said tungsten layer.