Fully depleted SOI device with tungsten damascene contacts and method of forming same

摘要

A fully depleted field effect transistor formed in a silicon on insulator (SOI) substrate includes a body region formed in a silicon device layer over an isolation layer of the SOI substrate. A gate is positioned above the body region and includes a base gate region adjacent the body region and a wide top gate region formed of tungsten damascene and spaced apart from the body region. An inverted T-shaped central channel region is formed between adjacent source regions and drain region in the body region.