IGBT with reduced feedback capacitance
First Claim
1. An IGBT comprising at least one first type transistor cell, comprising:
- a base region, a first emitter region, a body region, and a second emitter region, wherein the body region is arranged between the first emitter region and the base region, and wherein the base region is arranged between the body region and the second emitter region;
a gate electrode adjacent the body region, and dielectrically insulated from the body region by a gate dielectric; and
a base electrode adjacent the base region, and dielectrically insulated from the base region by a base electrode dielectric,wherein the base region has a first base region section adjoining the base electrode dielectric and a second base region section arranged between the second emitter region and the first base region section, and wherein a doping concentration of the first base region section is higher than a doping concentration of the second base region section,the IGBT further comprising;
at least one second type transistor cell comprising a first base region section with a lower doping concentration than the first base region section of the first type transistor cell.
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Accused Products
Abstract
An IGBT includes at least one first type transistor cell, including a base region, a first emitter region, a body region, and a second emitter region. The body region is arranged between the first emitter region and the base region. The base region is arranged between the body region and the second emitter region. The IGBT further includes a gate electrode adjacent the body region and dielectrically insulated from the body region by a gate dielectric, and a base electrode adjacent the base region and dielectrically insulated from the base region by a base electrode dielectric. The base region has a first base region section adjoining the base electrode dielectric and a second base region section arranged between the second emitter region and the first base region section. A doping concentration of the first base region section is higher than a doping concentration of the second base region section.
13 Citations
27 Claims
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1. An IGBT comprising at least one first type transistor cell, comprising:
- a base region, a first emitter region, a body region, and a second emitter region, wherein the body region is arranged between the first emitter region and the base region, and wherein the base region is arranged between the body region and the second emitter region;
a gate electrode adjacent the body region, and dielectrically insulated from the body region by a gate dielectric; and a base electrode adjacent the base region, and dielectrically insulated from the base region by a base electrode dielectric, wherein the base region has a first base region section adjoining the base electrode dielectric and a second base region section arranged between the second emitter region and the first base region section, and wherein a doping concentration of the first base region section is higher than a doping concentration of the second base region section, the IGBT further comprising; at least one second type transistor cell comprising a first base region section with a lower doping concentration than the first base region section of the first type transistor cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
- a base region, a first emitter region, a body region, and a second emitter region, wherein the body region is arranged between the first emitter region and the base region, and wherein the base region is arranged between the body region and the second emitter region;
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26. An IGBT comprising at least one first type transistor cell, comprising:
- a base region, a first emitter region, a body region, a second emitter region, and a third emitter region of a doping type complementary to a doping type of the second emitter region and electrically coupled in parallel with the second emitter region, wherein the body region is arranged between the first emitter region and the base region, and wherein the base region is arranged between the body region and the second emitter region;
a gate electrode adjacent the body region, and dielectrically insulated from the body region by a gate dielectric; and a base electrode adjacent the base region, and dielectrically insulated from the base region by a base electrode dielectric, wherein the base region has a first base region section adjoining the base electrode dielectric and a second base region section arranged between the second emitter region and the first base region section, and wherein a doping concentration of the first base region section is higher than a doping concentration of the second base region section. - View Dependent Claims (27)
- a base region, a first emitter region, a body region, a second emitter region, and a third emitter region of a doping type complementary to a doping type of the second emitter region and electrically coupled in parallel with the second emitter region, wherein the body region is arranged between the first emitter region and the base region, and wherein the base region is arranged between the body region and the second emitter region;
Specification