Interface trap induced drain leakage current in various n-MOSFET structures

Dominant drain leakage current mechanisms related to hot carrier stress generated interface traps are characterized in various n-MOSFET structures. Our study reveals that the lateral field induced band-trap-band tunneling is primarily responsible for an increased drain leakage current after hot carrier stress in an LDD MOSFET while the vertical field enhanced tunneling is a dominant leakage mechanism in a S/D conventional MOSFET structure.