WO2021019882A1 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- WO2021019882A1 WO2021019882A1 PCT/JP2020/020523 JP2020020523W WO2021019882A1 WO 2021019882 A1 WO2021019882 A1 WO 2021019882A1 JP 2020020523 W JP2020020523 W JP 2020020523W WO 2021019882 A1 WO2021019882 A1 WO 2021019882A1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D12/00—Bipolar devices controlled by the field effect, e.g. insulated-gate bipolar transistors [IGBT]
- H10D12/411—Insulated-gate bipolar transistors [IGBT]
- H10D12/441—Vertical IGBTs
- H10D12/461—Vertical IGBTs having non-planar surfaces, e.g. having trenches, recesses or pillars in the surfaces of the emitter, base or collector regions
- H10D12/481—Vertical IGBTs having non-planar surfaces, e.g. having trenches, recesses or pillars in the surfaces of the emitter, base or collector regions having gate structures on slanted surfaces, on vertical surfaces, or in grooves, e.g. trench gate IGBTs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D12/00—Bipolar devices controlled by the field effect, e.g. insulated-gate bipolar transistors [IGBT]
- H10D12/01—Manufacture or treatment
- H10D12/031—Manufacture or treatment of IGBTs
- H10D12/032—Manufacture or treatment of IGBTs of vertical IGBTs
- H10D12/038—Manufacture or treatment of IGBTs of vertical IGBTs having a recessed gate, e.g. trench-gate IGBTs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
- H10D30/028—Manufacture or treatment of FETs having insulated gates [IGFET] of double-diffused metal oxide semiconductor [DMOS] FETs
- H10D30/0291—Manufacture or treatment of FETs having insulated gates [IGFET] of double-diffused metal oxide semiconductor [DMOS] FETs of vertical DMOS [VDMOS] FETs
- H10D30/0297—Manufacture or treatment of FETs having insulated gates [IGFET] of double-diffused metal oxide semiconductor [DMOS] FETs of vertical DMOS [VDMOS] FETs using recessing of the gate electrodes, e.g. to form trench gate electrodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/64—Double-diffused metal-oxide semiconductor [DMOS] FETs
- H10D30/66—Vertical DMOS [VDMOS] FETs
- H10D30/668—Vertical DMOS [VDMOS] FETs having trench gate electrodes, e.g. UMOS transistors
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/124—Shapes, relative sizes or dispositions of the regions of semiconductor bodies or of junctions between the regions
- H10D62/126—Top-view geometrical layouts of the regions or the junctions
- H10D62/127—Top-view geometrical layouts of the regions or the junctions of cellular field-effect devices, e.g. multicellular DMOS transistors or IGBTs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/13—Semiconductor regions connected to electrodes carrying current to be rectified, amplified or switched, e.g. source or drain regions
- H10D62/133—Emitter regions of BJTs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/17—Semiconductor regions connected to electrodes not carrying current to be rectified, amplified or switched, e.g. channel regions
- H10D62/393—Body regions of DMOS transistors or IGBTs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/111—Field plates
- H10D64/117—Recessed field plates, e.g. trench field plates or buried field plates
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/20—Electrodes characterised by their shapes, relative sizes or dispositions
- H10D64/27—Electrodes not carrying the current to be rectified, amplified, oscillated or switched, e.g. gates
- H10D64/311—Gate electrodes for field-effect devices
- H10D64/411—Gate electrodes for field-effect devices for FETs
- H10D64/511—Gate electrodes for field-effect devices for FETs for IGFETs
- H10D64/512—Disposition of the gate electrodes, e.g. buried gates
- H10D64/513—Disposition of the gate electrodes, e.g. buried gates within recesses in the substrate, e.g. trench gates, groove gates or buried gates
Definitions
- the present invention relates to a semiconductor device.
- the semiconductor device includes a plurality of gate trench portions electrically connected to the gate electrode and a plurality of dummy trench portions electrically connected to the emitter electrode.
- a first trench group including one gate trench portion and two dummy trench portions adjacent to each other and adjacent to each other, and a second trench group including two gate trench portions adjacent to each other.
- a semiconductor device including.
- the second trench group may include three or more dummy trench portions that are adjacent to each other in succession.
- the second trench group includes two gate trench portions adjacent to each other and four dummy trench portions continuously adjacent to each other, and has a structure in which the two gate trench portions and the four dummy trench portions are adjacent to each other. You can do it.
- the first trench group and the second trench group are adjacent to each other.
- the semiconductor device may include a plurality of first trench groups and a plurality of second trench groups.
- the ratio of the number of the plurality of first trench groups to the number of the plurality of second trench groups may be 1: 1.
- the semiconductor device is provided below the first conductive type emitter region, the second conductive type base region having a polarity different from that of the first conductive type, and the first conductive type region, and has a doping concentration lower than that of the emitter region. It may include a conductive type drift region and a first conductive type storage region provided between the base region and the drift region and having a higher doping concentration than the drift region.
- the semiconductor device is a mesa portion sandwiched by at least two of a plurality of gate trench portions or a plurality of dummy trench portions, and has a first conductive type emitter region and a different polarity from that of the first conductive type. It may be provided with a mesa portion having two conductive base regions. The base region and the emitter region may be alternately arranged in the extending direction of the trench portion in contact with the mesa portion.
- the semiconductor device is a mesa portion sandwiched by at least two of a plurality of gate trench portions or a plurality of dummy trench portions, and has a first conductive type emitter region and a different polarity from that of the first conductive type. It may be provided with a mesa portion having two conductive base regions. The two emitter regions may extend in contact with the trench portion in contact with the mesa portion and sandwich the base region.
- FIG. It is a figure showing the change with respect to time t of the voltage Vak of a semiconductor device 300.
- one side in the direction parallel to the depth direction of the semiconductor substrate is referred to as "upper” or “front”, and the other side is referred to as “lower” or “back”.
- the upper surface is referred to as the upper surface and the other surface is referred to as the lower surface.
- the directions of "top”, “bottom”, “front”, and “back” are not limited to the direction of gravity or the direction of mounting on a substrate or the like when mounting a semiconductor device.
- Cartesian coordinate axes of the X-axis, the Y-axis, and the Z-axis In the present specification, technical matters may be described using Cartesian coordinate axes of the X-axis, the Y-axis, and the Z-axis.
- the plane parallel to the upper surface of the semiconductor substrate is defined as the XY plane, and the depth direction of the semiconductor substrate is defined as the Z axis.
- the XYZ system is a right-handed system.
- top view the case where the semiconductor substrate is viewed in the Z-axis direction.
- the first conductive type is N type and the second conductive type is P type, but the first conductive type may be P type and the second conductive type may be N type.
- the conductive types such as the substrate, the layer, and the region in each embodiment have opposite polarities.
- the doping concentration refers to the concentration of impurities that have been donated or accepted.
- the concentration difference between the donor and the acceptor may be referred to as the doping concentration.
- the peak value of the doping concentration distribution in the doping region may be used as the doping concentration in the doping region.
- N and P mean that the doping concentration is higher and the doping concentration is lower than that of the layer or region to which it is not attached, respectively.
- FIG. 1A is an example of a cross-sectional view of the semiconductor device 100 according to the embodiment.
- the semiconductor device 100 may be an IGBT or a vertical MOSFET.
- the semiconductor device 100 includes a semiconductor substrate 10.
- the semiconductor substrate 10 of this example includes a trench group including a dummy trench portion 30 and a gate trench portion 40, and a mesa portion which is a dopant diffusion region between the trench groups.
- the trench group of this example has a first trench group 110 and a second trench group 120.
- the dummy trench portion 30 has a dummy insulating film 32 and a dummy conductive portion 34.
- the dummy conductive portion 34 is electrically connected to the emitter electrode 52 and is set to the emitter potential Ve.
- the emitter potential Ve may be set to the ground potential.
- the gate trench portion 40 has a gate insulating film 42 and a gate conductive portion 44.
- the gate conductive portion 44 is electrically connected to the gate electrode 50 and is set to the gate potential Vg.
- the gate potential Vg may be higher than the emitter potential Ve.
- the mesa portion of the semiconductor substrate 10 of this example includes the mesa portion 60, the mesa portion 62, or the mesa portion 64.
- the mesa portion 60 is a region sandwiched between the gate trench portions 40 on the front surface of the semiconductor substrate 10.
- the mesa portion 62 is a region sandwiched between the gate trench portion 40 and the dummy trench portion 30 on the front surface of the semiconductor substrate 10.
- the mesa portion 64 is a region sandwiched between the dummy trench portions 30 on the front surface of the semiconductor substrate 10.
- the mesa portion 60, the mesa portion 62, or the mesa portion 64 of the semiconductor substrate 10 is provided below the first conductive type emitter region 12, the second conductive type base region 14, and the base region 14 from the upper surface side. It has a conductive type drift region 18 and a second conductive type collector region 22.
- the semiconductor substrate 10 does not have a collector region 22.
- the mesa portion 60, the mesa portion 62, or the mesa portion 64 of this example has a first conductive type storage region 16 provided between the base region 14 and the drift region 18.
- the IE effect of the carrier on the base region 14 injection Enhancement effect, injection promoting effect
- the storage region 16 may be omitted as shown in another example of the cross-sectional view of the semiconductor device 100 according to the embodiment of FIG. 1B.
- the emitter region 12 is a first conductive type region provided on the front surface side of the semiconductor substrate 10.
- the emitter region 12 has an N + -type polarity.
- the base region 14 is a second conductive type region provided in contact with the lower part of the emitter region 12.
- the base region 14 has a P-type polarity.
- the base region 14 may be exposed on the front surface of the semiconductor substrate 10.
- the gate conductive portion 44 is set to the gate potential Vg, electrons are attracted to the gate trench portion 40 side in the base region 14.
- An N-shaped channel is formed in a region of the base region 14 in contact with the gate trench portion 40, and is driven as a transistor.
- a conductor 54 is arranged on the upper surface of the emitter region 12 and is connected to the emitter electrode 52.
- An interlayer insulating film 56 is arranged on the upper surface of the gate conductive portion 44. The interlayer insulating film 56 insulates the conductor 54 and the gate conductive portion 44.
- a conductor 55 may be provided on the lower surface of the semiconductor substrate 10 and connected to an external electrode.
- the conductor 55 may be provided on the lower surface of the collector region 22 and connected to the collector electrode.
- the first trench group 110 has one gate trench portion 40, and has a plurality of consecutively adjacent dummy trench portions 30.
- the plurality of dummy trench portions 30 included in the first trench group 110 may be a 1G2E trench group provided adjacent to one gate trench portion 40 and having two dummy trench portions 30 adjacent to each other.
- the capacitance Cies will be charged. The entire capacitance Cies proportional to the surface area of the gate trench 40 is charged, and the capacitance Cies to be charged is large.
- the second trench group 120 includes two gate trench portions 40 adjacent to each other, and includes a plurality of dummy trench portions 30. In the second trench group 120, the two gate trench portions 40 and the plurality of dummy trench portions 30 are adjacent to each other.
- the second trench group 120 may include three or more consecutively adjacent dummy trench portions that are consecutively adjacent to each other.
- the second trench group 120 may include four consecutively adjacent dummy trench portions 30 provided adjacent to the two gate trench portions 40 adjacent to each other.
- a 2G4E trench group when a plurality of dummy trench portions 30 are four, it is referred to as a 2G4E trench group.
- the first trench group 110 is a 1G2E trench group and the second trench group 120 is a 2G4E trench group, characteristics such as pressure resistance of each region are maintained equally.
- the region of the semiconductor substrate 10 including the second trench group 120 has a mesa portion 60 adjacent to each other in the gate trench portions 40.
- the gate potential Vg is applied to both of the gate conductive portions 44 of the trench portion adjacent to the mesa portion 60. Therefore, a potential difference between the gate conductive portion 44 and the mesa portion 60 is likely to occur. That is, in the second trench group 120, the capacitance Cies between the gate conductive portion 44 and the emitter region 12 at the time of turn-on is smaller than that in the first trench group 110.
- the semiconductor device 100 has a plurality of first trench groups 110 and a plurality of second trench groups 120.
- the capacitance Cies is adjusted, and the time of the potential V that changes when the semiconductor device 100 is switched.
- the slope dV / dt with respect to t can be adjusted.
- Characteristics such as withstand voltage and switching characteristics of the semiconductor device 100 depend on the ratio of the number of dummy trench portions 30 and gate trench portions 40.
- the first trench group 110 is a 1G2E trench group and the second trench group 120 is a 2G4E trench group
- the inclination dV of the potential V with respect to the time t is maintained while maintaining the overall performance of the semiconductor device 100. / Dt can be adjusted.
- the plurality of first trench groups 110 and the plurality of second trench groups 120 are provided at a predetermined ratio.
- the ratio of the number of the plurality of first trench groups 110 to the number of the plurality of second trench groups may be 1: 1.
- the ratio of the number of the plurality of first trench groups 110 to the number of the plurality of second trench groups is 1: 1, dV / dt is applied over the entire voltage region during switching of the semiconductor device 100. Can be reduced.
- the ratio of the number of the plurality of first trench groups 110 to the number of the plurality of second trench groups is not limited to 1: 1 and may be 1: 3 to 3: 1.
- the plurality of first trench groups 110 and the plurality of second trench groups 120 are arranged alternately. That is, the semiconductor device 100 includes a structure in which the first trench group 110 and the second trench group 120 are adjacent to each other. However, the first trench group 110 and the second trench group 120 may be arranged so as to satisfy a predetermined arrangement ratio, and are not limited to being arranged alternately.
- FIG. 1C is an example of a circuit diagram of the semiconductor assembly 150.
- the semiconductor assembly 150 two semiconductor chips 78 are connected in series.
- the semiconductor device 100 may be composed of a circuit element including a semiconductor chip 78.
- the semiconductor chip 78-2 may form the lower arm portion 80.
- the semiconductor chip 78-1 may form the upper arm portion 82.
- a set of lower arm portions 80 and upper arm portions 82 included in the semiconductor assembly 150 may form a leg.
- the emitter electrode of the semiconductor chip 78-2 may be electrically connected to the input terminal N1, and the collector electrode of the semiconductor chip 78-2 may be electrically connected to the output terminal U.
- the emitter electrode of the semiconductor chip 78-1 may be electrically connected to the output terminal U, and the collector electrode of the semiconductor chip 78-1 may be electrically connected to the input terminal P1.
- the lower arm portion 80 and the upper arm portion 82 may be alternately switched by a signal input to the control electrode pad of the semiconductor chip 78.
- the input terminal P1 may be connected to the positive electrode of the external power supply.
- the input terminal N1 may be connected to the negative electrode of the external power supply.
- the output terminals U, V and W may be connected to the load respectively.
- the semiconductor chip 78 may be an RC-IGBT semiconductor chip.
- the IGBT and the freewheeling diode (FWD) are integrally formed.
- the IGBT and FWD may be connected in antiparallel.
- the semiconductor chip 78 may include a combination of a transistor portion such as a MOSFET or an IGBT and a diode portion, respectively.
- the semiconductor device 100 may be a semiconductor chip 78.
- the relationship between the semiconductor chips 78-1 and 78-2 is referred to as the relationship arranged on the opposing arm.
- a reverse recovery current flows between the transistor portion arranged on the semiconductor chip 78-2 and the diode portion of the semiconductor chip 78-1 arranged on the opposite arm.
- the absolute value of the radiation noise generated in the diode part of the semiconductor chip 78-1 also becomes large.
- a large surge current flows into the current flowing through the transistor portion arranged on the semiconductor chip 78-2.
- a large radiation noise at the time of reverse recovery is generated in a switching operation at a high frequency of 30 to 40 MHz.
- the semiconductor device 100 by using both the first trench group 110 and the second trench group 120 provided on the front surface of the semiconductor substrate 10 at a predetermined ratio, the low voltage side during the switching operation is used. DV / dt can be reduced in a wide range from to the high voltage side.
- FIG. 1D is a diagram comparing the capacitance Cies of the first trench group 110 and the second trench group 120.
- the first trench group 110 has a larger capacitance Cies than the second trench group 120.
- the capacitance Cies serves as a reference for determining the driving speed of the semiconductor device 100 on the low voltage side.
- the capacitance of the capacitance Cies becomes small at the time on the high voltage side immediately before the gate-emitter voltage stabilizes. That is, in the region on the high voltage side, the influence of the number of the dummy trench portions 30 continuously provided on the adjacent gate trench portions 40 becomes larger. Since the number of the dummy trench portions 30 provided continuously has a large influence on the performance of the semiconductor device 100, the number of the dummy trench portions 30 provided continuously is determined based on the desired performance of the semiconductor device 100. You can.
- FIG. 2A is an example of a cross-sectional view of the semiconductor device 200 according to Comparative Example 1.
- the semiconductor device 200 has a first trench group 110 and does not have a second trench group 120.
- the first trench group 110 is repeatedly provided.
- the trench portions on both sides adjacent to one gate trench portion 40 become the dummy trench portion 30. That is, the facing area between the gate trench portion 40 and the dummy trench portion 30 is large.
- FIG. 2B is a diagram showing changes in the current Iak and the voltage Vak of the semiconductor device 200 with respect to time t.
- the time variation of the voltage Vak is shown.
- the change dV / dt of the voltage Vak at the start of switching with time t is small.
- the change dV / dt of the voltage Vak just before the voltage Vak becomes high and stabilizes is large.
- the semiconductor device 200 having the first trench group 110 takes a value of dV / dt larger than that of the semiconductor device 100 at a high voltage and before the voltage stabilizes.
- FIG. 3A is a cross-sectional view of the semiconductor device 300 according to Comparative Example 2.
- the semiconductor substrate 10 according to the semiconductor device 300 has a second trench group 120 and does not have a first trench group 110.
- the second trench group 120 is repeatedly provided.
- 2G4E trench groups are repeatedly provided.
- both the trench portions adjacent to the mesa portion 60 are set to the gate potential Vg. That is, the potential difference between the gate conductive portion 44 and the mesa portion 60 becomes large, and an N-type channel is easily formed in the base region 14. This corresponds to the small capacitance Cies between the gate conductive portion 44 and the emitter region 12 when the semiconductor device 300 is driven.
- FIG. 3B is a diagram showing changes in the current Iak and the voltage Vak of the semiconductor device 300 with respect to time t.
- the time variation of the voltage Vak is shown.
- the semiconductor device 300 having the second trench group 120 has a large dV / dt on the low voltage side and a small dV / dt on the high voltage side with respect to the semiconductor device 200 having only the first trench group 110. ..
- the capacitance Cies of the semiconductor device 300 Since the capacitance Cies of the semiconductor device 300 is small, dV / dt at the time of low voltage at turn-on becomes large. On the other hand, in the case of stabilizing to a high voltage after driving, by having a mesa portion 62 between the dummy trench portion 30 and the gate trench portion 40 and a mesa portion 60 between the gate trench portions 40, the capacitance The value of dV / dt decreases due to the difference in capacitance Cies.
- FIG. 4 is a diagram showing changes in the current Iak and the voltage Vak of the semiconductor device 100 with respect to time t. The time change of the voltage Vak at the time of turn-on of the semiconductor device 100 is shown.
- the semiconductor device 100 has a characteristic that combines the characteristics of the semiconductor device 200 on the low voltage side and the characteristics of the semiconductor device 300 on the high voltage side. That is, it has a small dV / dt value on both the low voltage side and the high voltage side.
- the semiconductor device 100 Since the dV / dt of the semiconductor device 100 is small, the absolute value of the noise generated in the voltage Vak and the current Iak is also small in the semiconductor device 100. Therefore, in the semiconductor device 100, sufficient protection can be given to the element, and a highly reliable circuit can be configured.
- FIG. 5 is an example of a top view of the mesa portion 60 of the semiconductor device 100.
- the configuration of the mesa portion 60 sandwiched between the gate trench portions 40 is shown.
- the mesa portion 62 or the mesa portion 64 may have a similar configuration. That is, the mesa portion sandwiched by at least two of the plurality of gate trench portions 40 or the plurality of dummy trench portions 30 may have the same configuration.
- the base region 14 and the emitter region 12 of this example are alternately arranged in the stretching direction of the two gate trench portions 40 in contact with the mesa portion 60.
- the semiconductor device 100 is an IGBT
- latch-up of the IGBT is suppressed by the configuration of the mesa portion 60 on the upper surface of the semiconductor substrate 10.
- FIG. 6 is another example of a top view of the mesa portion 60 of the semiconductor device 100.
- the configuration of the mesa portion 60 sandwiched between the gate trench portions 40 is shown.
- the mesa portion 62 or the mesa portion 64 may have a similar configuration. That is, the mesa portion sandwiched by at least two of the plurality of gate trench portions 40 or the plurality of dummy trench portions 30 may have the same configuration.
- the emitter region 12 of this example extends in contact with two gate trench portions 40 in contact with the mesa portion 60.
- the emitter region 12 is arranged so as to sandwich the base region 14.
- the structure of the mesa portion 60 of this example is referred to as a basic structure.
Landscapes
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Semiconductor Integrated Circuits (AREA)
Abstract
Description
[先行技術文献]
[特許文献]
[特許文献1] 国際公開第2015/162811号パンフレット
[特許文献2] 国際公開第2017/033315号パンフレット
Claims (8)
- ゲート電極と電気的に接続された複数のゲートトレンチ部と、エミッタ電極と電気的に接続された複数のダミートレンチ部とを備える半導体装置であって、
1つのゲートトレンチ部と、前記ゲートトレンチ部と隣り合って設けられ、互いに隣り合う2つのダミートレンチ部とを含む第1のトレンチ群と、
互いに隣り合う2つの前記ゲートトレンチ部を含む第2のトレンチ群と
を備える
半導体装置。 - 前記第2のトレンチ群は、連続して隣り合う3つ以上の前記ダミートレンチ部を含む
請求項1に記載の半導体装置。 - 前記第2のトレンチ群は、互いに隣り合う2つの前記ゲートトレンチ部と、
連続して隣り合う4つの前記ダミートレンチ部と、を有し、
2つの前記ゲートトレンチ部と4つの前記ダミートレンチ部とが隣り合う、
請求項1または2に記載の半導体装置。 - 前記第1のトレンチ群および前記第2のトレンチ群は、互いに隣り合う、
請求項1から3のいずれか一項に記載の半導体装置。 - 複数の前記第1のトレンチ群と、
複数の前記第2のトレンチ群とを備え、
複数の前記第1のトレンチ群の数と、複数の前記第2のトレンチ群の数との比は、1:1である、
請求項1から4のいずれか一項に記載の半導体装置。 - 第1導電型のエミッタ領域と、
第1導電型とは異なる極性である第2導電型のベース領域と、
前記ベース領域の下方に設けられ、前記エミッタ領域より低いドーピング濃度を有する第1導電型のドリフト領域と、
前記ベース領域および前記ドリフト領域の間に設けられ、前記ドリフト領域より高いドーピング濃度を有する第1導電型の蓄積領域と、を備える、
請求項1から5のいずれか一項に記載の半導体装置。 - 前記複数のゲートトレンチ部または前記複数のダミートレンチ部のうち少なくとも2つによって挟まれたメサ部であって、
第1導電型のエミッタ領域と、
第1導電型とは異なる極性である第2導電型のベース領域と、を有する、メサ部を備え、
前記ベース領域および前記エミッタ領域は、前記メサ部に接するトレンチ部の延伸方向において交互に配置される、
請求項1から5のいずれか一項に記載の半導体装置。 - 前記複数のゲートトレンチ部または前記複数のダミートレンチ部のうち少なくとも2つによって挟まれたメサ部であって、
第1導電型のエミッタ領域と、
第1導電型とは異なる極性である第2導電型のベース領域と、を有する、メサ部を備え、
2つの前記エミッタ領域は、前記メサ部に接するトレンチ部に接して延伸し、前記ベース領域を挟む、
請求項1から5のいずれか一項に記載の半導体装置。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112020000200.4T DE112020000200T5 (de) | 2019-07-31 | 2020-05-25 | Halbleitervorrichtung |
| CN202080007233.8A CN113316852B (zh) | 2019-07-31 | 2020-05-25 | 半导体装置 |
| JP2021536626A JP7151902B2 (ja) | 2019-07-31 | 2020-05-25 | 半導体装置 |
| US17/356,585 US12087849B2 (en) | 2019-07-31 | 2021-06-24 | Semiconductor device |
| US18/826,144 US20240429311A1 (en) | 2019-07-31 | 2024-09-05 | Semiconductor device |
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| JP2019-141434 | 2019-07-31 | ||
| JP2019141434 | 2019-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US17/356,585 Continuation US12087849B2 (en) | 2019-07-31 | 2021-06-24 | Semiconductor device |
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| WO2021019882A1 true WO2021019882A1 (ja) | 2021-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/JP2020/020523 Ceased WO2021019882A1 (ja) | 2019-07-31 | 2020-05-25 | 半導体装置 |
Country Status (5)
| Country | Link |
|---|---|
| US (2) | US12087849B2 (ja) |
| JP (1) | JP7151902B2 (ja) |
| CN (1) | CN113316852B (ja) |
| DE (1) | DE112020000200T5 (ja) |
| WO (1) | WO2021019882A1 (ja) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7319601B2 (ja) * | 2019-11-01 | 2023-08-02 | 株式会社東芝 | 半導体装置 |
| JP7607538B2 (ja) * | 2021-09-14 | 2024-12-27 | 三菱電機株式会社 | 半導体装置 |
| US12588263B2 (en) * | 2022-03-23 | 2026-03-24 | Kabushiki Kaisha Toshiba | Insulated gate bipolar transistor (IGBT) semiconductor device with reduced turn-on loss |
| JP2024098458A (ja) * | 2023-01-10 | 2024-07-23 | 富士電機株式会社 | 半導体装置 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002016252A (ja) * | 2000-06-27 | 2002-01-18 | Toshiba Corp | 絶縁ゲート型半導体素子 |
| JP2009206478A (ja) * | 2008-01-28 | 2009-09-10 | Fuji Electric Device Technology Co Ltd | 半導体装置 |
| WO2015162811A1 (ja) * | 2014-04-21 | 2015-10-29 | 三菱電機株式会社 | 電力用半導体装置 |
| WO2017033315A1 (ja) * | 2015-08-26 | 2017-03-02 | 三菱電機株式会社 | 半導体素子 |
| JP2017147300A (ja) * | 2016-02-16 | 2017-08-24 | 富士電機株式会社 | 半導体装置 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3961946B2 (ja) * | 1997-03-14 | 2007-08-22 | 株式会社東芝 | 半導体装置 |
| JP4823435B2 (ja) * | 2001-05-29 | 2011-11-24 | 三菱電機株式会社 | 半導体装置及びその製造方法 |
| JP4731848B2 (ja) * | 2004-07-16 | 2011-07-27 | 株式会社豊田中央研究所 | 半導体装置 |
| JP5412717B2 (ja) * | 2007-08-29 | 2014-02-12 | 富士電機株式会社 | トレンチ型絶縁ゲート半導体装置 |
| DE102009005914B4 (de) | 2008-01-28 | 2014-02-13 | Denso Corporation | Halbleitervorrichtung mit Halbleiterelement mit isoliertem Gate und bipolarer Transistor mit isoliertem Gate |
| JP4950934B2 (ja) * | 2008-04-14 | 2012-06-13 | 株式会社東芝 | 絶縁ゲート型半導体装置 |
| JP6835568B2 (ja) * | 2016-12-22 | 2021-02-24 | ルネサスエレクトロニクス株式会社 | トレンチゲートigbt |
-
2020
- 2020-05-25 JP JP2021536626A patent/JP7151902B2/ja active Active
- 2020-05-25 CN CN202080007233.8A patent/CN113316852B/zh active Active
- 2020-05-25 DE DE112020000200.4T patent/DE112020000200T5/de active Pending
- 2020-05-25 WO PCT/JP2020/020523 patent/WO2021019882A1/ja not_active Ceased
-
2021
- 2021-06-24 US US17/356,585 patent/US12087849B2/en active Active
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2024
- 2024-09-05 US US18/826,144 patent/US20240429311A1/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002016252A (ja) * | 2000-06-27 | 2002-01-18 | Toshiba Corp | 絶縁ゲート型半導体素子 |
| JP2009206478A (ja) * | 2008-01-28 | 2009-09-10 | Fuji Electric Device Technology Co Ltd | 半導体装置 |
| WO2015162811A1 (ja) * | 2014-04-21 | 2015-10-29 | 三菱電機株式会社 | 電力用半導体装置 |
| WO2017033315A1 (ja) * | 2015-08-26 | 2017-03-02 | 三菱電機株式会社 | 半導体素子 |
| JP2017147300A (ja) * | 2016-02-16 | 2017-08-24 | 富士電機株式会社 | 半導体装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113316852A (zh) | 2021-08-27 |
| CN113316852B (zh) | 2025-08-12 |
| JPWO2021019882A1 (ja) | 2021-11-18 |
| US20210320195A1 (en) | 2021-10-14 |
| DE112020000200T5 (de) | 2021-09-09 |
| JP7151902B2 (ja) | 2022-10-12 |
| US12087849B2 (en) | 2024-09-10 |
| US20240429311A1 (en) | 2024-12-26 |
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