Abstract: In advanced CMOS technology nodes with Cu/low-k interconnect, metal hard-mask approach AIO etch is the key process to define the physical structure of Cu line and via. The via hole and via ...
Abstract: Silicon nitride (SiN) hard mask (HM) has been investigated to achieve sub-100nm of high aspect ratio (HAR) pattern. In this study, SiN HM trimming technique is developed by mean of cyclic ...