Semiconductor device
First Claim
1. A semiconductor device comprising:
- a high-resistance first-conductivity-type base layer;
a first-conductivity-type drain layer formed on one surface of the first-conductivity-type base layer;
a second-conductivity-type base layer formed at the other surface of the first-conductivity-type base layer;
a first-conductivity-type source layer formed at one surface of the second-conductivity-type base layer;
a second-conductivity-type injection layer formed at said other surface of the first-conductivity-type base layer in a region different from a region where the second-conductivity-type base layer is formed;
a trench formed at said other surface of the first-conductivity-type base layer between the second-conductivity-type base layer and the second-conductivity-type injection layer so as to extend from a surface of the first-conductivity-type source layer through the second-conductivity-type base layer into the first-conductivity-type base layer, the trench serving as a carrier barrier between the second-conductivity-type injection layer and the first-conductivity-type source layer;
a first gate electrode buried in the trench with an insulating film interposed;
a first main electrode formed on the first-conductivity-type drain layer;
a second main electrode formed on the first-conductivity-type source layer; and
a second gate electrode formed on the second-conductivity-type injection layer.
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Accused Products
Abstract
A semiconductor device comprises a high-resistance n type base layer, an n type drain layer formed on one surface of the n type base layer, p type base layers selectively formed at the other surface of the n type base layer, n type source layers selectively formed at surfaces of the p type base layers, p type injection layers selectively formed at the other surface of the n type base layer in regions different from regions where the n type source layers and p type base layers are formed, a trench selectively formed to extend from a surface of each n type source layer through the p type base layer into the n type base layer, a first gate electrode buried in the trench with an insulating film interposed, a drain electrode formed on the n type drain layer, a source electrode formed on the n type source layer, and a second gate electrode formed on the p type injection layer.
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Citations
10 Claims
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1. A semiconductor device comprising:
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a high-resistance first-conductivity-type base layer; a first-conductivity-type drain layer formed on one surface of the first-conductivity-type base layer; a second-conductivity-type base layer formed at the other surface of the first-conductivity-type base layer; a first-conductivity-type source layer formed at one surface of the second-conductivity-type base layer; a second-conductivity-type injection layer formed at said other surface of the first-conductivity-type base layer in a region different from a region where the second-conductivity-type base layer is formed; a trench formed at said other surface of the first-conductivity-type base layer between the second-conductivity-type base layer and the second-conductivity-type injection layer so as to extend from a surface of the first-conductivity-type source layer through the second-conductivity-type base layer into the first-conductivity-type base layer, the trench serving as a carrier barrier between the second-conductivity-type injection layer and the first-conductivity-type source layer; a first gate electrode buried in the trench with an insulating film interposed; a first main electrode formed on the first-conductivity-type drain layer; a second main electrode formed on the first-conductivity-type source layer; and a second gate electrode formed on the second-conductivity-type injection layer. - View Dependent Claims (2, 3, 4, 5)
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6. A semiconductor device comprising:
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a high-resistance first-conductivity-type base layer; a first-conductivity-type drain layer formed on one surface of the first-conductivity-type base layer; a second-conductivity-type base layer formed at the other surface of the first-conductivity-type base layer; a first-conductivity-type source layer formed at one surface of the second-conductivity-type base layer; a first gate electrode formed at the second-conductivity-type base layer between the first-conductivity-type base layer and the first-conductivity-type source layer, with a gate insulating film interposed; a second-conductivity-type injection layer formed at said other surface of the first-conductivity-type base layer in a region spaced apart from the second-conductivity-type base layer by a predetermined distance; a first main electrode formed on the first-conductivity-type drain layer; a second main electrode formed on the first-conductivity-type source layer; and a second gate electrode formed on the second-conductivity-type injection layer, wherein the second main electrode is in contact with a first-conductivity-type semiconductor layer including the first-conductivity-type source layer, but the second main electrode is not in contact with a second-conductivity-type semiconductor layer including the second-conductivity-type base layer. - View Dependent Claims (7)
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8. A semiconductor device comprising:
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a high-resistance first-conductivity-type base layer; a first-conductivity-type drain layer formed on one surface of the first-conductivity-type base layer; a second-conductivity-type base layer formed at the other surface of the first-conductivity-type base layer; a first-conductivity-type source layer formed at one surface of the second-conductivity-type base layer; first gate electrode formed at the second-conductivity-type base layer between the first-conductivity-type base layer and the first-conductivity-type source layer, with a gate insulating film interposed; a second-conductivity-type injection layer formed at said other surface of the first-conductivity-type base layer in a region spaced apart from the second-conductivity-type base layer by a predetermined distance; a first main electrode formed on the first-conductivity-type drain layer; a second main electrode formed on the first-conductivity-type source layer; and a second gate electrode formed on the second-conductivity-type injection layer, wherein the first gate electrode is buried in a trench extending from a surface of the first-conductivity-type source layer through the second-conductivity-type base layer into the first-conductivity-type base layer, with said gate insulating film interposed. - View Dependent Claims (9)
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10. A semiconductor device comprising:
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a high-resistance first-conductivity type base layer; a first-conductivity-type drain layer formed on one surface of the first-conductivity-type base layer; a second-conductivity-type base layer formed at the other surface of the first-conductivity-type base layer; a first-conductivity-type source layer formed at one surface of the second-conductivity-type base layer; a second-conductivity-type injection layer formed at said other surface of the first-conductivity-type base layer in a region spaced apart from the second-conductivity-type base layer by a predetermined distance; a first main electrode formed on the first-conductivity-type drain layer; a second main electrode formed on the first-conductivity-type source layer; and a gate electrode formed on the second-conductivity-type injection layer, wherein the second main electrode is in contact with a first-conductivity-type semiconductor layer including the first-conductivity-type source layer, but the second main electrode is not in contact with a second-conductivity-type semiconductor layer including the second-conductivity-type base layer.
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Specification