Study on the Guard Rings for Latchup Prevention between HV-PMOS and LV-PMOS in a 0.15-µm BCD Process. - Chao-Yang Chen; Jian-Hsing Lee; Karuna Nidhi; Tzer-Yaa Bin; Geeng-Lih Lin; Ming-Dou Ker (IRPS, 2021)