J Yin, F Zheng, L Shu, Y Zhang, J Shen… - 2024 Conference of …, 2024 - ieeexplore.ieee.org
… process flow of Metal 1 (M1) using TiN as a hard mask in BEOL. To guarantee the formation
of the critical features, a typical etch … ) is a hard mask material for etching SiO2 used in Front …