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accumulation condition

the region of the capacitance-voltage (C-V) curve for which a 5-V increment toward a more negative voltage for p-type material, or toward a more positive voltage for n-type material, results in a change of less than 1% in the maximum capacitance, Cmax. [ASTM F1241] (The "max" part of the abbreviation "Cmax"is written with subscript lowercase letters.)