Semiconductor device
OwnerMasanori TSUKUDAinventor
Life of this patent
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Abstract
A semiconductor device includes: a first semiconductor layer; a first electrode provided on a first surface side of the first semiconductor layer; a first insulating layer; and a second semiconductor layer. The first insulating layer is provided between the first semiconductor layer and the first electrode and configured to constrict current flowing between the first semiconductor layer and the first electrode. The second semiconductor layer has a first conductivity type and is provided at least on a path of the current constricted by the first insulating layer. The second semiconductor layer is in contact with the first electrode. The second semiconductor layer contains first impurities at a concentration higher than a concentration of impurities contained in the first semiconductor layer.
Claims8
A semiconductor device comprising:
- a first semiconductor layer;
- a second semiconductor layer of a first conductivity type provided on a surface of the first semiconductor layer and containing first impurities at a concentration higher than a concentration of impurities contained in the first semiconductor layer;
- a third semiconductor layer of the first conductivity type selectively formed on the second semiconductor layer and containing first impurities at a concentration higher than the concentration of impurities contained in the second semiconductor layer;
- a first electrode provided on the second semiconductor layer and the third semiconductor layer;
- a fourth semiconductor layer of a second conductivity type provided on the opposite side of the first semiconductor layer from the first electrode and containing second impurities at a concentration higher than the concentration of impurities contained in the first semiconductor layer;
- and
- a second electrode provided on the opposite side of the fourth semiconductor layer from the first electrode and electrically connected with the fourth semiconductor.
Dependencies are inferred from the claim text.