Semiconductor device and method for manufacturing same
First Claim
1. A semiconductor device comprising:
- a semiconductor layer of a first conductive type;
a base region of a second conductive type provided on the semiconductor layer;
a first contact region of a second conductive type provided on the base region;
a gate electrode provided via a gate insulating film in a trench piercing through the first contact region and the base region and reaching the semiconductor layer;
an interlayer insulating film provided on the gate electrode and containing a first conductive type impurity element;
a source region of a first conductive type provided between the interlayer insulating film and the first contact region, the source region being in contact with a side face of the interlayer insulating film and extending in the base region;
a first major electrode electrically connected to the semiconductor layer; and
a second major electrode provided on the interlayer insulating film and connected to the source region and the first contact region.
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Abstract
According to an embodiment, a semiconductor device includes a semiconductor layer of a first conductive type, a base region of a second conductive type provided on the semiconductor layer and a first contact region of a second conductive type provided on the base region. The device includes a gate electrode provided in a trench piercing through the first contact region and the base region, and an interlayer insulating film provided on the gate electrode and containing a first conductive type impurity element. The device further includes a source region of a first conductive type provided between the interlayer insulating film and the first contact region, the source region being in contact with a side face of the interlayer insulating film and extending in the base region.
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Citations
14 Claims
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1. A semiconductor device comprising:
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a semiconductor layer of a first conductive type; a base region of a second conductive type provided on the semiconductor layer; a first contact region of a second conductive type provided on the base region; a gate electrode provided via a gate insulating film in a trench piercing through the first contact region and the base region and reaching the semiconductor layer; an interlayer insulating film provided on the gate electrode and containing a first conductive type impurity element; a source region of a first conductive type provided between the interlayer insulating film and the first contact region, the source region being in contact with a side face of the interlayer insulating film and extending in the base region; a first major electrode electrically connected to the semiconductor layer; and a second major electrode provided on the interlayer insulating film and connected to the source region and the first contact region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification