N-type MOS capacitors have been experimented with Substrate Hot-carrier Ejection (SHE). By means of high frequency and quasi-static C-V techniques
the characteristics and mechanism of MOS structure’s damage induced by SHE have been studied from the changes of oxide charges and interface states as well as distribution of the interface state with the energy before and after SHE. The results are helpful to further harden MOS devices from hot carrier ejection damage.