PFIB Delayering—Nanoprobing Workflow on 5nm FinFET device

As advanced device technologies scale to 5nm with dimensions getting smaller and materials change, it is difficult to control the sample preparation delayering end pointing by polishing. Therefore, it requires an alternative solution such as Xe+ PFIB (Plasma Focused Ion beam) Microscopy for accurate delayering control. PFIB can be used for planar Failure Analysis (FA) delayering but also for nanoprobing sample preparation. This paper introduces the detail of nanoprobing sample preparation by PFIB and discusses nanoprobing results on 5nm FinFET technology.