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We investigate the validity of using frequency-dependent charge pumping (FD-CP) to determine bulk defect depth distributions. Using simple physical arguments we conclude that: (1) the effective tunneling length to a bulk defect can be very different than its actual physical depth, and (2) only a fraction of detrapping charge may contribute to the CP current (ICP) resulting in analysis errors. Thus,...
We develop a simple experimental approach to remove bulk trap contributions from charge pumping data collected on devices which suffer from large amounts of bulk dielectric electron trapping. The approach is more desirable and easier to implement than other simulation/device modeling based approaches. We demonstrate the approach using HfO2 based MOSFETs. Additionally, we provide an explanation for...
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