Novel strained SiGe/TaOx/Ta RRAM device fabricated by fully CMOS compatible process

Abstract

A novel strained SiGe/TaOx/Ta RRAM device is successfully demonstrated via a fully CMOS compatible process. The bottom electrode (BE) is made of strained single crystalline SiGe layer where both n type and p type SiGe layer as the BE. Typical bipolar switching behavior is obtained for such RRAM devices. Cycle to cycle uniformity are investigated in this work, and it is found that n type SiGe as BE shows better uniformity due to the better dopant distribution for Arsenic than Boron in SiGe layer.