Fowler--Nordheim Tunneling at Sharp-Shaped Floating Gate Structure Modeled as Triangular Electrode
Gilang Mardian Kartiwa 1,
Muhammad Amin Sulthoni 2, and
Fatimah Arofiati Noor 1
1. Department of Physics Insttitut Teknologi Bandung, Bandung, Indonesia
2. School of Electrical Engineering and Informatic, InstitutTeknologi Bandung, Bandung, Indonesia
2. School of Electrical Engineering and Informatic, InstitutTeknologi Bandung, Bandung, Indonesia
Abstract—The poly to poly tunneling mechanism in a split gate memory device was studied using the Fowler-Nordheim equation. The electric field distribution between a sharp-shaped floating gate and its split gate pair was calculated by modeling the sharp floating gate as a triangular electrode. The electric field expression was then used to calculate the tunnel current density, evaluated both at low and high bias, which resemble the erasing process in a flash memory device. The results were compared with those published by Silicon Storage Technology (SST) as the inventor. It was shown that the two-tunnel current density profiles are different at a low bias regime but become more similar as the applied bias increases. This dissimilarity results from the difference in geometry used to model the sharp-tip floating gate. In spite of the discrepancy at low regime bias, it is argued that this triangular electrode model is still adequate for use as a qualitative model to simulate the erasing process, which is known to be done at high applied voltage.
Index Terms—Fowler--Nordheim, sharp electrode, tunnel current density
Cite: Gilang Mardian Kartiwa, Muhammad Amin Sulthoni, and Fatimah Arofiati Noor, "Fowler--Nordheim Tunneling at Sharp-Shaped Floating Gate Structure Modeled as Triangular Electrode," International Journal of Electronics and Electrical Engineering, Vol. 7, No. 4, pp. 79-82, December 2019. doi: 10.18178/ijeee.7.4.79-82
Cite: Gilang Mardian Kartiwa, Muhammad Amin Sulthoni, and Fatimah Arofiati Noor, "Fowler--Nordheim Tunneling at Sharp-Shaped Floating Gate Structure Modeled as Triangular Electrode," International Journal of Electronics and Electrical Engineering, Vol. 7, No. 4, pp. 79-82, December 2019. doi: 10.18178/ijeee.7.4.79-82
Array