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EESM5200 (L2) Part II: Topic 4 - MOS Capacitor with a Source
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It is known that the incremental charges ΔQ of a MOS capacitor consists of p-type silicon substrate with a source come from different sources. For the different regions given in the figure below, indicate the source of excess charges in Region 1: Region 1: holes from the substrate Region 2: negative ions from the substrate Region 3: electrons from the source
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To tackle this question, I will examine what each region in a MOS capacitor represents in terms of charge sources.
Region 1: holes from the substrate
This region is described as containing holes from the substrate. In a p-type substrate, the majority carriers are holes. Under the appropriate gate bias, the interfacial region can accumulate holes, which originate from the substrate itself.......Login to view full explanationLog in for full answers
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