芯片制造工艺问答011:ODR pattern density对STI CMP有何影响?
Ans ODR density愈高,CMP的etch
rate会愈快,且ODR density也与STI density相关(STI density高,OD
density就低,相对地ODR density也要增加)Polish amount simulation equation by E2CMP (KA) =
[OD_ mask_field_ratio x (1- ODR_mask_field