Recessed junction and low energy n-junction implantation characteristics

Abstract

The characteristics of cell transistor with low energy junction implantation and recessed junction, which is formed by in_situ phosphorus doped selective silicon growth, are investigated. Adding the low energy n-junction implantation drastically reduces the contact resistance of pad/n-junction. And also, the drive current is improved without any degradation of BV (Breakdown Voltage) and leakage characteristics. Plasma damage free TDSE (Thermal Desorption of Silicon Etching) processing using the Cl 2 gas chemistry in UHV CVD Chamber is used to controll the junction depth. The recessed junction is formed with phosphorusdoped silicon using the SEG (Selective Epitaxial Growth) process and the characteristics of recessed junction are evaluated.