SEMICONDUCTOR DEVICE AND ELECTRIC POWER CONVERSION APPARATUS USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a semiconductor device capable of inhibiting characteristic fluctuations, such as threshold fluctuations and the deterioration of the short circuit capacity, which are caused by variations of the manufacturing processes.SOLUTION: A semiconductor device includes: a semiconductor substrate having a pair of main surfaces; a first conductive type first semiconductor layer formed in the semiconductor substrate; a pair of trench gates which is formed in the first semiconductor layer; a protruding shape semiconductor layer which is formed between the pair of trench gates; a first conductive type second semiconductor layer which is formed at a step part of the protruding shape semiconductor layer; and a second conductive type third semiconductor layer which is formed in a protruding part of the protruding shape semiconductor layer.