WO2022249753A1 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
- Publication number
- WO2022249753A1 WO2022249753A1 PCT/JP2022/016190 JP2022016190W WO2022249753A1 WO 2022249753 A1 WO2022249753 A1 WO 2022249753A1 JP 2022016190 W JP2022016190 W JP 2022016190W WO 2022249753 A1 WO2022249753 A1 WO 2022249753A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gate
- wiring
- polysilicon
- region
- semiconductor device
- Prior art date
Links
- 239000004065 semiconductor Substances 0.000 title claims abstract description 173
- 229920005591 polysilicon Polymers 0.000 claims abstract description 157
- 239000000758 substrate Substances 0.000 claims abstract description 96
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 156
- 238000010586 diagram Methods 0.000 description 35
- 239000000370 acceptor Substances 0.000 description 27
- 239000011229 interlayer Substances 0.000 description 18
- 230000002093 peripheral effect Effects 0.000 description 17
- 239000000386 donor Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 14
- 125000004429 atom Chemical group 0.000 description 9
- 239000012535 impurity Substances 0.000 description 9
- 239000010410 layer Substances 0.000 description 8
- 230000001681 protective effect Effects 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000004020 conductor Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000001004 secondary ion mass spectrometry Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- KPSZQYZCNSCYGG-UHFFFAOYSA-N [B].[B] Chemical compound [B].[B] KPSZQYZCNSCYGG-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000852 hydrogen donor Substances 0.000 description 1
- -1 hydrogen ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 150000003609 titanium compounds Chemical class 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/70—Bipolar devices
- H01L29/72—Transistor-type devices, i.e. able to continuously respond to applied control signals
- H01L29/739—Transistor-type devices, i.e. able to continuously respond to applied control signals controlled by field-effect, e.g. bipolar static induction transistors [BSIT]
- H01L29/7393—Insulated gate bipolar mode transistors, i.e. IGBT; IGT; COMFET
- H01L29/7395—Vertical transistors, e.g. vertical IGBT
- H01L29/7396—Vertical transistors, e.g. vertical IGBT with a non planar surface, e.g. with a non planar gate or with a trench or recess or pillar in the surface of the emitter, base or collector region for improving current density or short circuiting the emitter and base regions
- H01L29/7397—Vertical transistors, e.g. vertical IGBT with a non planar surface, e.g. with a non planar gate or with a trench or recess or pillar in the surface of the emitter, base or collector region for improving current density or short circuiting the emitter and base regions and a gate structure lying on a slanted or vertical surface or formed in a groove, e.g. trench gate IGBT
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/0684—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by the shape, relative sizes or dispositions of the semiconductor regions or junctions between the regions
- H01L29/0692—Surface layout
- H01L29/0696—Surface layout of cellular field-effect devices, e.g. multicellular DMOS transistors or IGBTs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/402—Field plates
- H01L29/405—Resistive arrangements, e.g. resistive or semi-insulating field plates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42356—Disposition, e.g. buried gate electrode
- H01L29/4236—Disposition, e.g. buried gate electrode within a trench, e.g. trench gate electrode, groove gate electrode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/86—Types of semiconductor device ; Multistep manufacturing processes therefor controllable only by variation of the electric current supplied, or only the electric potential applied, to one or more of the electrodes carrying the current to be rectified, amplified, oscillated or switched
- H01L29/861—Diodes
- H01L29/8613—Mesa PN junction diodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/0603—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions
- H01L29/0607—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration
- H01L29/0611—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices
- H01L29/0615—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices by the doping profile or the shape or the arrangement of the PN junction, or with supplementary regions, e.g. junction termination extension [JTE]
- H01L29/0619—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices by the doping profile or the shape or the arrangement of the PN junction, or with supplementary regions, e.g. junction termination extension [JTE] with a supplementary region doped oppositely to or in rectifying contact with the semiconductor containing or contacting region, e.g. guard rings with PN or Schottky junction
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/10—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions with semiconductor regions connected to an electrode not carrying current to be rectified, amplified or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
- H01L29/1095—Body region, i.e. base region, of DMOS transistors or IGBTs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/402—Field plates
- H01L29/407—Recessed field plates, e.g. trench field plates, buried field plates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42372—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the conducting layer, e.g. the length, the sectional shape or the lay-out
- H01L29/4238—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the conducting layer, e.g. the length, the sectional shape or the lay-out characterised by the surface lay-out
Definitions
- the present invention relates to semiconductor devices.
- Patent Document 1 JP-A-2018-206873
- Patent Document 2 International Publication No. 2016-098409
- Patent Document 3 JP-A-2017-135245
- a first aspect of the present invention provides a semiconductor device including a semiconductor substrate.
- the semiconductor substrate may have an active portion.
- the semiconductor substrate may have a plurality of gate trench portions.
- the gate trench portion may be provided in the active portion on the upper surface of the semiconductor substrate.
- the gate trench portion may extend along the extending direction.
- the semiconductor device may include gate wiring.
- the gate wiring may be provided between the active portion and the edge of the semiconductor substrate.
- a semiconductor device may comprise a plurality of gate polysilicon.
- the gate polysilicon may be spaced apart from each other along the edges.
- the gate polysilicon may connect each of the plurality of gate trench portions to the gate wiring.
- At least one gate trench portion among the plurality of gate trench portions may be connected to one gate polysilicon among the plurality of gate polysilicon portions.
- At least one gate trench portion may have two straight portions extending along the extending direction. At least one gate trench section may have a tip connecting two straight sections. The width of the gate trench portion including the two straight portions in the arrangement direction perpendicular to the extending direction may be larger than the width of the gate polysilicon connected to the gate trench portion in the arrangement direction.
- At least one gate trench portion may have one straight portion extending along the extending direction.
- the width of the gate trench portion in the arrangement direction perpendicular to the extending direction may be larger than the width of the gate polysilicon connected to the gate trench portion in the arrangement direction.
- the gate polysilicon may be provided discretely along the direction in which the gate wiring extends.
- the semiconductor substrate may have two first edges perpendicular to the extending direction.
- the semiconductor substrate may have two second edges parallel to the extending direction.
- the gate wiring may have a first wiring provided between the first edge and the active portion.
- the gate wiring may have a second wiring provided between the second edge and the active portion.
- the gate polysilicon may be provided below the first wiring. Gate polysilicon need not be provided below the second wiring.
- the gate polysilicon may have a length in the direction from the gate wiring toward the gate trench.
- the gate polysilicon may have a length in the extension direction.
- At least part of the gate trench portion may be provided to extend below the gate wiring.
- the gate polysilicon may be provided between the gate trench portion and the gate wiring in the depth direction.
- the longitudinal directions of at least two gate polysilicon may have different angles with respect to the extending direction.
- the gate wiring may have a curved portion connecting the first wiring and the second wiring.
- the longitudinal direction of the gate polysilicon connected to the first wiring may be different from the longitudinal direction of the gate polysilicon connected to the curved portion.
- At least a portion of the gate trench portion may be provided extending below the curved portion of the gate wiring.
- At least one gate polysilicon may be provided in the depth direction between the gate trench portion and the curved portion.
- At least one gate polysilicon may have a length in a direction from the first wiring of the gate wiring toward the gate trench portion.
- FIG. 1 is a top view showing an example of a semiconductor device 100;
- FIG. 2 is a diagram showing a comparative example of area D in FIG. 1;
- FIG. 3 is a diagram showing an example of a gg cross section in FIG. 2;
- FIG. 3 is a diagram showing an example of a cross section taken along line aa in FIG. 2;
- FIG. 3 is a diagram showing an example of a bb cross section in FIG. 2;
- FIG. 3 is a diagram showing an example of a cc cross section in FIG. 2;
- 2 is a diagram showing an example of an embodiment of region D in FIG. 1;
- FIG. FIG. 8 is a diagram showing an example of a dd cross section in FIG. 7;
- FIG. 8 is a diagram showing an example of an ee cross section in FIG. 7;
- FIG. 8 is a diagram showing an example of the ff section in FIG. 7;
- FIG. 2 is a diagram showing another example of an embodiment of region D in FIG. 1;
- FIG. 12 is a diagram showing an example of the hh cross section in FIG. 11;
- FIG. 2 is a diagram showing another example of an embodiment of region D in FIG. 1;
- 2 is a diagram showing a comparative example of region E in FIG. 1;
- FIG. FIG. 2 is a diagram showing an example of an embodiment of region E in FIG. 1;
- FIG. 2 is a diagram showing another example of an embodiment of region E in FIG. 1;
- FIG. 2 is a diagram showing another example of an embodiment of region E in FIG. 1;
- FIG. 10 illustrates an example of an edge termination structure 90;
- FIG. 2 is a diagram showing an example of an ii cross section in FIG. 1;
- one side in the direction parallel to the depth direction of the semiconductor substrate is called “upper”, and the other side is called “lower”.
- One of the two main surfaces of a substrate, layer or other member is called the upper surface and the other surface is called the lower surface.
- the directions of “up” and “down” are not limited to the direction of gravity or the direction when the semiconductor device is mounted.
- the Cartesian coordinate axes only specify the relative positions of the components and do not limit any particular orientation.
- the Z axis does not limit the height direction with respect to the ground.
- the +Z-axis direction and the ⁇ Z-axis direction are directions opposite to each other.
- the Z-axis direction is described without indicating positive or negative, it means a direction parallel to the +Z-axis and -Z-axis.
- orthogonal axes parallel to the upper and lower surfaces of the semiconductor substrate are defined as the X-axis and the Y-axis.
- the axis perpendicular to the upper and lower surfaces of the semiconductor substrate is defined as the Z-axis.
- the Z-axis direction may be referred to as the depth direction.
- a direction parallel to the upper and lower surfaces of the semiconductor substrate, including the X-axis and Y-axis may be referred to as a horizontal direction.
- the region from the center of the semiconductor substrate in the depth direction to the upper surface of the semiconductor substrate may be referred to as the upper surface side.
- the region from the center of the semiconductor substrate in the depth direction to the bottom surface of the semiconductor substrate may be referred to as the bottom surface side.
- the conductivity type of the doping region doped with impurities is described as P-type or N-type.
- impurities may specifically refer to either N-type donors or P-type acceptors, and may also be referred to as dopants.
- doping means introducing donors or acceptors into a semiconductor substrate to make it a semiconductor exhibiting N-type conductivity or a semiconductor exhibiting P-type conductivity.
- doping concentration means the concentration of donors or the concentration of acceptors at thermal equilibrium.
- the net doping concentration means the net concentration including charge polarity, where the donor concentration is the positive ion concentration and the acceptor concentration is the negative ion concentration.
- the donor concentration is N D and the acceptor concentration is N A , then the net net doping concentration at any location is N D ⁇ N A.
- net doping concentration may be simply referred to as doping concentration.
- a donor has the function of supplying electrons to a semiconductor.
- the acceptor has the function of receiving electrons from the semiconductor.
- Donors and acceptors are not limited to impurities per se.
- VOH defects in which vacancies (V), oxygen (O), and hydrogen (H) are combined in semiconductors function as donors that supply electrons.
- VOH defects are sometimes referred to herein as hydrogen donors.
- references herein to P-type or N-type refer to higher doping concentrations than P-type or N-type; references to P-type or N-type refer to higher doping than P-type or N-type. It means that the concentration is low.
- the unit system in this specification is the SI unit system unless otherwise specified. The unit of length is sometimes displayed in cm, but various calculations may be performed after converting to meters (m).
- chemical concentration refers to the atomic density of impurities measured regardless of the state of electrical activation.
- Chemical concentrations can be measured, for example, by secondary ion mass spectroscopy (SIMS).
- the net doping concentrations mentioned above can be measured by the voltage-capacitance method (CV method).
- the carrier concentration measured by the spreading resistance measurement method (SR method) may be used as the net doping concentration.
- the carrier concentration measured by the CV method or SR method may be a value in thermal equilibrium.
- the donor concentration is sufficiently higher than the acceptor concentration in the N-type region, the carrier concentration in the region may be used as the donor concentration.
- the carrier concentration in that region may be used as the acceptor concentration.
- the doping concentration of the N-type regions is sometimes referred to herein as the donor concentration
- the doping concentration of the P-type regions is sometimes referred to as the acceptor concentration.
- the peak value may be taken as the concentration of donors, acceptors or net doping in the region.
- the average value of the concentration of donors, acceptors or net doping in the region may be used as the concentration of donors, acceptors or net doping.
- atoms/cm 3 or /cm 3 are used to express concentration per unit volume. This unit is used for donor or acceptor concentrations, or chemical concentrations, within a semiconductor substrate. The atoms notation may be omitted.
- the carrier concentration measured by the SR method may be lower than the donor or acceptor concentration.
- the carrier mobility of the semiconductor substrate may be lower than the value in the crystalline state. A decrease in carrier mobility is caused by scattering of carriers due to disorder of the crystal structure due to lattice defects or the like.
- the donor or acceptor concentration calculated from the carrier concentration measured by the CV method or the SR method may be lower than the chemical concentration of the element representing the donor or acceptor.
- the donor concentration of phosphorus or arsenic as a donor or the acceptor concentration of boron (boron) as an acceptor in a silicon semiconductor is about 99% of these chemical concentrations.
- the donor concentration of hydrogen serving as a donor in a silicon semiconductor is about 0.1% to 10% of the chemical concentration of hydrogen.
- Each concentration herein may be a value at room temperature. As an example of the value at room temperature, the value at 300 K (Kelvin) (approximately 26.9° C.) may be used.
- FIG. 1 is a top view showing an example of a semiconductor device 100.
- FIG. FIG. 1 shows the positions of each member projected onto the upper surface of the semiconductor substrate 10 .
- FIG. 1 only some members of the semiconductor device 100 are shown, and some members are omitted.
- a semiconductor device 100 includes a semiconductor substrate 10 .
- the semiconductor substrate 10 is a substrate made of a semiconductor material.
- the semiconductor substrate 10 is a silicon substrate, but the material of the semiconductor substrate 10 is not limited to silicon.
- the semiconductor substrate 10 has a first edge 161 and a second edge 162 when viewed from above.
- simply referring to a top view means viewing from the top side of the semiconductor substrate 10 .
- the semiconductor substrate 10 of this example has two sets of first edges 161 facing each other when viewed from above.
- the semiconductor substrate 10 of this example has two sets of second edges 162 facing each other when viewed from above.
- the first edge 161 is parallel to the X-axis direction.
- the second edge 162 is parallel to the Y-axis direction.
- the Z-axis is perpendicular to the upper surface of the semiconductor substrate 10 .
- the first edge 161 is perpendicular to the extension direction of the gate trench portion, which will be described later.
- the second edge 162 is parallel to the extending direction of the gate trench portion, which will be described later.
- An active portion 160 is provided on the semiconductor substrate 10 .
- the active portion 160 is a region through which a main current flows in the depth direction between the upper and lower surfaces of the semiconductor substrate 10 when the semiconductor device 100 operates.
- An emitter electrode is provided above the active portion 160, but is omitted in FIG.
- the active section 160 is provided with a transistor section 70 including transistor elements such as IGBTs.
- transistor sections 70 and diode sections including diode elements such as FWD (Free Wheel Diode) may be alternately arranged along a predetermined arrangement direction on the upper surface of semiconductor substrate 10 .
- a reverse blocking IGBT may be provided in the transistor section 70 .
- three transistor sections 70 (transistor section 70-1, transistor section 70-2 and transistor section 70-3) are provided along the X-axis direction.
- a P+ type well region or gate polysilicon, which will be described later, may be provided between the transistor portions 70 .
- the transistor section 70 has a P+ type collector region in a region in contact with the lower surface of the semiconductor substrate 10 .
- a gate structure having an N+ type emitter region, a P ⁇ type base region, a gate conductive portion and a gate insulating film is periodically arranged on the upper surface side of the semiconductor substrate 10.
- the semiconductor device 100 may have one or more pads above the semiconductor substrate 10 .
- the semiconductor device 100 of this example has a gate pad 164 .
- Semiconductor device 100 may have pads such as an anode pad, a cathode pad, and a current sensing pad. Each pad is arranged near the first edge 161 .
- the vicinity of the first edge 161 refers to a region between the first edge 161 and the emitter electrode when viewed from above.
- each pad may be connected to an external circuit via a wiring such as a wire.
- a gate potential is applied to the gate pad 164 .
- Gate pad 164 is electrically connected to the conductive portion of the gate trench portion of active portion 160 .
- the semiconductor device 100 includes a gate wiring 130 connecting the gate pad 164 and the gate trench portion. In FIG. 1, the gate wiring 130 is hatched with oblique lines.
- the gate wiring 130 is arranged between the active portion 160 and the first edge 161 or the second edge 162 when viewed from above.
- the gate wiring 130 of this example surrounds the active portion 160 when viewed from above.
- a region surrounded by the gate wiring 130 in top view may be the active portion 160 .
- the gate wiring 130 is connected to the gate pad 164 .
- the gate wiring 130 is arranged above the semiconductor substrate 10 .
- the gate wiring 130 may be a metal wiring containing aluminum or the like.
- the gate wiring 130 has a first wiring 131 , a second wiring 132 and a curved portion 133 .
- the first wiring 131 is provided between the first edge 161 and the active portion 160 .
- the second wiring 132 is provided between the second edge 162 and the active portion 160 .
- Curved portion 133 connects first wiring 131 and second wiring 132 .
- the curved portions 133 may be provided near four corners of the semiconductor substrate 10 . Curved portion 133 may be a portion having a curve.
- the gate wiring 130 has two first wirings 131 , two second wirings 132 and four curved portions 133 .
- the outer well region 11 is provided so as to overlap with the gate wiring 130 . In other words, like the gate wiring 130, the outer well region 11 surrounds the active portion 160 when viewed from above. The outer well region 11 is also provided to extend with a predetermined width in a range that does not overlap with the gate wiring 130 .
- the outer well region 11 is a region of the second conductivity type.
- the peripheral well region 11 in this example is of P+ type (see FIG. 2).
- the impurity concentration of outer well region 11 may be 5.0 ⁇ 10 17 atoms/cm 3 or more and 5.0 ⁇ 10 19 atoms/cm 3 or less.
- the impurity concentration of outer well region 11 may be 2.0 ⁇ 10 18 atoms/cm 3 or more and 2.0 ⁇ 10 19 atoms/cm 3 or less.
- the semiconductor device 100 also includes a temperature sensing portion (not shown), which is a PN junction diode made of polysilicon or the like, and a current detecting portion (not shown) that simulates the operation of the transistor portion 70 provided in the active portion 160.
- the temperature sensing section may be connected to the anode pad and the cathode pad through wiring.
- the temperature sensing portion is provided, it is preferably provided in the center of the semiconductor substrate 10 in the X-axis direction and the Y-axis direction.
- the semiconductor device 100 of this example includes an edge termination structure portion 90 between the active portion 160 and the first edge 161 or the second edge 162 when viewed from above.
- the edge termination structure 90 of this example is arranged between the peripheral gate line 130 and the first edge 161 or the second edge 162 .
- the edge termination structure 90 reduces electric field concentration on the upper surface side of the semiconductor substrate 10 .
- Edge termination structure 90 may include at least one of a guard ring, a field plate, and a resurf annularly surrounding active portion 160 . Edge termination structure 90 is described in detail in FIG.
- FIG. 2 is a diagram showing a comparative example of area D in FIG.
- FIG. 2 is an enlarged view of area D in FIG.
- a region D is a region including the transistor portion 70 in the vicinity of the first wiring 131 of the gate wiring 130 .
- the semiconductor device 100 of this example includes a gate trench portion 40 , a dummy trench portion 30 , an outer peripheral well region 11 , an emitter region 12 and a contact region 15 provided inside the upper surface side of the semiconductor substrate 10 .
- Each of the gate trench portion 40 and the dummy trench portion 30 is an example of the trench portion.
- the semiconductor device 100 of this example includes an emitter electrode 52 and a gate wiring 130 (first wiring 131) provided above the upper surface of the semiconductor substrate 10.
- FIG. Emitter electrode 52 and gate interconnection 130 are provided separately from each other.
- An interlayer insulating film is provided between emitter electrode 52 and gate line 130 and the upper surface of semiconductor substrate 10 . In FIG. 2, an interlayer insulating film is omitted.
- the emitter electrode 52 is provided above the gate trench portion 40 , the dummy trench portion 30 , the outer peripheral well region 11 , the emitter region 12 and the contact region 15 .
- Emitter electrode 52 contacts emitter region 12 and contact region 15 on the upper surface of semiconductor substrate 10 through contact hole 54 .
- the emitter electrode 52 is connected to the dummy conductive portion in the dummy trench portion 30 through a contact hole 56 provided in the interlayer insulating film.
- the emitter electrode 52 is connected to the dummy conductive portion within the dummy trench portion 30 via the dummy polysilicon 36 .
- the emitter electrode 52 may be connected to the dummy conductive portion of the dummy trench portion 30 at the tip of the dummy trench portion 30 in the Y-axis direction.
- the dummy polysilicon 36 is made of polysilicon, which is a conductive material.
- the dummy polysilicon 36 may be provided above the semiconductor substrate 10 .
- the gate wiring 130 is connected to the gate polysilicon 46 through the contact hole 58 provided in the interlayer insulating film. Gate polysilicon 46 connects with gate trench portion 40 . That is, the gate wiring 130 is connected to the gate trench portion 40 through the gate polysilicon 46 .
- the gate wiring 130 may be connected to the gate conductive portion of the gate trench portion 40 at the tip portion 41 of the gate trench portion 40 in the Y-axis direction. Gate wiring 130 is not connected to the dummy conductive portion in dummy trench portion 30 .
- the gate polysilicon 46 is made of polysilicon, which is a conductive material. A gate polysilicon 46 may be provided above the semiconductor substrate 10 .
- the gate polysilicon 46 is provided along the extending direction (X-axis direction) of the gate wiring 130 .
- Gate polysilicon 46 is provided along the edge (first edge 161 in FIG. 1). In the comparative example, the gate polysilicon 46 is continuously provided in the X-axis direction.
- the emitter electrode 52 is made of a material containing metal.
- the emitter electrode 52 is made of aluminum or a metal alloy such as an aluminum-silicon alloy such as AlSi, AlSiCu.
- the emitter electrode 52 may have a barrier metal made of titanium, a titanium compound, or the like under the region made of aluminum or the like. Further, the contact hole may have a plug formed by embedding tungsten or the like so as to be in contact with the barrier metal and the aluminum or the like.
- the transistor section 70 has a plurality of trench sections arranged in the arrangement direction.
- trench portions are provided in the active portion 160 and the outer well region 11 on the upper surface of the semiconductor substrate 10 .
- the trench portions are provided in a stripe shape in the top view of the transistor portion 70 .
- one or more gate trench sections 40 and one or more dummy trench sections 30 are alternately provided along the arrangement direction.
- one gate trench portion 40 and one dummy trench portion 30 are provided alternately.
- the arrangement direction in FIG. 2 is the X-axis direction.
- the gate trench portion 40 of this example connects the two straight portions 39 extending along the extending direction perpendicular to the arrangement direction (the portion of the trench that is linear along the extending direction) and the two straight portions 39 . It may have a tip 41 .
- the stretching direction in FIG. 2 is the Y-axis direction.
- At least a portion of the tip portion 41 is preferably provided in a curved shape when viewed from above.
- the dummy trench portions 30 are provided between the respective straight portions 39 of the gate trench portions 40 .
- One dummy trench portion 30 may be provided between the straight portions 39, or a plurality of dummy trench portions 30 may be provided. In this example, one dummy trench portion 30 is provided between each straight portion 39 .
- the diffusion depth of the outer peripheral well region 11 may be deeper than the depths of the gate trench portion 40 and the dummy trench portion 30 .
- Y-axis direction ends of the gate trench portion 40 and the dummy trench portion 30 are provided in the outer peripheral well region 11 when viewed from above. That is, the bottom of each trench in the depth direction is covered with the outer well region 11 at the end of each trench in the Y-axis direction. As a result, electric field concentration at the bottom of each trench can be relaxed.
- the semiconductor device 100 may include the gate trench portion 40 or the dummy trench portion 30 that is entirely provided in the outer peripheral well region 11 when viewed from above.
- a mesa portion is provided between each trench portion in the arrangement direction.
- the mesa portion refers to a region sandwiched between trench portions inside the semiconductor substrate 10 .
- the upper end of the mesa portion is the upper surface of the semiconductor substrate 10 .
- the depth position of the lower end of the mesa portion is the same as the depth position of the lower end of the trench portion.
- the mesa portion of this example extends in the extension direction (Y-axis direction) along the trench on the upper surface of the semiconductor substrate 10 .
- the transistor section 70 is provided with the mesa section 60 .
- Each mesa portion 60 may be provided with at least one of the first conductivity type emitter region 12 and the second conductivity type contact region 15 .
- the emitter region 12 in this example is of N+ type and the contact region 15 is of P+ type.
- the emitter region 12 and the contact region 15 may be provided between the base region and the upper surface of the semiconductor substrate 10 in the depth direction.
- the mesa portion 60 of the transistor portion 70 has the emitter region 12 exposed on the upper surface of the semiconductor substrate 10 .
- the emitter region 12 is provided in contact with the gate trench portion 40 .
- the mesa portion 60 in contact with the gate trench portion 40 may be provided with the contact region 15 exposed to the upper surface of the semiconductor substrate 10 .
- the contact region 15 is exposed on the upper surface of the semiconductor substrate 10 in the mesa portion 60 and arranged closest to the gate wiring 130 .
- Each of the contact region 15 and the emitter region 12 in the mesa portion 60 is provided from one trench portion to the other trench portion in the X-axis direction.
- the contact regions 15 and the emitter regions 12 of the mesa portion 60 are alternately arranged along the extension direction (Y-axis direction) of the trench portion.
- the contact regions 15 and the emitter regions 12 of the mesa portion 60 may be provided in stripes along the extending direction (Y-axis direction) of the trench portion.
- an emitter region 12 is provided in a region in contact with the trench portion, and a contact region 15 is provided in a region sandwiched between the emitter regions 12 .
- FIG. 3 is a diagram showing an example of a gg section in FIG.
- the gg section is the XZ plane passing through the emitter region 12 . Note that the dimensions in FIG. 3 do not necessarily match the dimensions in FIG.
- Semiconductor device 100 of this example has semiconductor substrate 10 , interlayer insulating film 38 , emitter electrode 52 , collector electrode 24 and protective film 150 in the cross section.
- the interlayer insulating film 38 is provided on the upper surface 21 of the semiconductor substrate 10 .
- the interlayer insulating film 38 is a film including at least one layer of an insulating film such as silicate glass doped with an impurity such as boron or phosphorus, a thermal oxide film, and other insulating films.
- the contact hole 54 described with reference to FIG. 2 is provided in the interlayer insulating film 38 .
- the emitter electrode 52 is provided above the interlayer insulating film 38 . Emitter electrode 52 is in contact with top surface 21 of semiconductor substrate 10 through contact hole 54 in interlayer insulating film 38 . Note that the emitter electrode 52 may be provided above the outer peripheral well region 11 . A gate wiring 130 may be provided above the outer well region 11 . In this example, a gate polysilicon 46 is provided below the gate wiring 130 .
- the collector electrode 24 is provided on the bottom surface 23 of the semiconductor substrate 10 .
- Emitter electrode 52 and collector electrode 24 are made of a metal material such as aluminum.
- the direction (Z-axis direction) connecting the emitter electrode 52 and the collector electrode 24 is referred to as the depth direction.
- Each mesa portion 60 is provided with a base region 14 of the second conductivity type.
- Emitter region 12 and contact region 15 are provided between top surface 21 of semiconductor substrate 10 and base region 14 .
- the base region 14 in this example is P-type.
- the semiconductor substrate 10 has a first conductivity type drift region 18 .
- Drift region 18 in this example is N-type.
- an N+ type emitter region 12 and a P ⁇ type base region 14 are provided in order from the upper surface 21 side of the semiconductor substrate 10 .
- a drift region 18 is provided below the base region 14 .
- the mesa portion 60 may be provided with an N+ type accumulation region (not shown).
- the emitter region 12 is exposed on the upper surface 21 of the semiconductor substrate 10 and provided in contact with the gate trench portion 40 .
- the emitter region 12 may be in contact with trench portions on both sides of the mesa portion 60 .
- Emitter region 12 has a higher doping concentration than drift region 18 .
- a base region 14 is provided below the emitter region 12 .
- the base region 14 in this example is provided in contact with the emitter region 12 .
- the base region 14 may contact trench portions on both sides of the mesa portion 60 .
- the impurity concentration peak of the base region 14 is, for example, 2.5 ⁇ 10 17 atoms/cm 3 .
- the impurity concentration of base region 14 may be 5.0 ⁇ 10 16 atoms/cm 3 or more and 1.0 ⁇ 10 18 atoms/cm 3 or less.
- the mesa portion 60 is provided with the P+ type contact region 15 and the P ⁇ type base region 14 in this order from the upper surface 21 side of the semiconductor substrate 10 .
- a drift region 18 is provided below the base region 14 .
- An N+ type buffer region 20 may be provided under the drift region 18 .
- the doping concentration of buffer region 20 is higher than the doping concentration of drift region 18 .
- Buffer region 20 may have a concentration peak with a higher doping concentration than drift region 18 .
- the doping concentration of the concentration peak refers to the doping concentration at the apex of the concentration peak.
- an average value of doping concentrations in a region where the doping concentration distribution is substantially flat may be used as the doping concentration of the drift region 18.
- the buffer region 20 may be formed by ion-implanting hydrogen (protons) or an N-type dopant such as phosphorus.
- the buffer region 20 of this example is formed by implanting hydrogen ions.
- the buffer region 20 may function as a field stop layer that prevents the depletion layer extending from the bottom end of the base region 14 from reaching the P+ type collector region 22 .
- a P+ type collector region 22 is provided under the buffer region 20 .
- the acceptor concentration of collector region 22 is higher than the acceptor concentration of base region 14 .
- Collector region 22 may contain the same acceptor as base region 14 or may contain a different acceptor.
- the acceptor of the collector region 22 is boron, for example. Elements that serve as acceptors are not limited to the above examples.
- the collector region 22 is exposed on the bottom surface 23 of the semiconductor substrate 10 and connected to the collector electrode 24 .
- Collector electrode 24 may contact the entire bottom surface 23 of semiconductor substrate 10 .
- Emitter electrode 52 and collector electrode 24 are made of a metal material such as aluminum.
- One or more gate trench portions 40 and one or more dummy trench portions 30 are provided on the upper surface 21 side of the semiconductor substrate 10 .
- a plurality of gate trench portions 40 and a plurality of dummy trench portions 30 are provided on the upper surface 21 side of the semiconductor substrate 10 .
- Each trench extends from the upper surface 21 of the semiconductor substrate 10 through the base region 14 and reaches the drift region 18 .
- each trench portion also penetrates these doping regions and reaches drift region 18 .
- the fact that the trench penetrates the doping region is not limited to the order of forming the doping region and then forming the trench.
- a structure in which a doping region is formed between the trench portions after the trench portions are formed is also included in the structure in which the trench portion penetrates the doping regions.
- the gate trench portion 40 has a gate trench provided in the upper surface 21 of the semiconductor substrate 10, a gate insulating film 42 and a gate conductive portion 44.
- the gate conductive portion 44 is made of polysilicon, which is a conductive material. Gate conductive portion 44 may be formed of the same material as gate polysilicon 46 .
- a gate insulating film 42 is provided to cover the inner wall of the gate trench. The gate insulating film 42 may be formed by oxidizing or nitriding the semiconductor on the inner wall of the gate trench. In FIG. 3, the gate conductive portion 44 is provided inside the gate insulating film 42 inside the gate trench. That is, the gate insulating film 42 insulates the gate conductive portion 44 and the semiconductor substrate 10 from each other.
- the gate conductive portion 44 in the gate trench portion 40 may be provided longer than the base region 14 in the depth direction.
- the gate trench portion 40 in the cross section is covered with the interlayer insulating film 38 on the upper surface 21 of the semiconductor substrate 10 .
- the gate conductive portion 44 is electrically connected to the gate wiring 130 .
- a predetermined gate voltage is applied to the gate conductive portion 44 , a channel is formed by an electron inversion layer in the surface layer of the interface contacting the gate trench portion 40 in the base region 14 .
- the dummy trench portion 30 may have the same structure as the gate trench portion 40 in the cross section.
- the dummy trench section 30 has a dummy trench provided in the upper surface 21 of the semiconductor substrate 10 , a dummy insulating film 32 and a dummy conductive section 34 .
- the dummy conductive portion 34 is made of polysilicon, which is a conductive material.
- the dummy conductive portion 34 may be made of the same material as the dummy polysilicon 36 .
- the dummy conductive portion 34 is electrically connected to the emitter electrode 52 .
- a dummy insulating film 32 is provided to cover the inner wall of the dummy trench. In FIG.
- the dummy conductive portion 34 is provided inside the dummy trench and inside the dummy insulating film 32 .
- the dummy insulating film 32 insulates the dummy conductive portion 34 from the semiconductor substrate 10 .
- the dummy conductive portion 34 may have the same length as the gate conductive portion 44 in the depth direction.
- the gate trench portion 40 and the dummy trench portion 30 of this example are covered with an interlayer insulating film 38 on the upper surface 21 of the semiconductor substrate 10 .
- the bottoms of the dummy trench portion 30 and the gate trench portion 40 may be curved (curved in cross section) convex downward.
- a protective film 150 is provided on the upper surface of the emitter electrode 52 . By providing the protective film 150 on the upper surface of the emitter electrode 52, the electrode can be protected.
- the protective film 150 may be provided by patterning.
- the protective film 150 is, for example, a polyimide film.
- FIG. 4 is a diagram showing an example of the aa section in FIG.
- the aa cross section is the YZ plane passing through the contact hole 56 .
- the dimensions in FIG. 4 do not necessarily match the dimensions in FIG.
- Semiconductor device 100 of this example has semiconductor substrate 10 , interlayer insulating film 38 , emitter electrode 52 , collector electrode 24 and protective film 150 in the cross section. 4, illustration of the vicinity of the lower surface 23 of the semiconductor substrate 10 is omitted.
- the dummy conductive portion 34 in the dummy trench portion 30 is connected to the emitter electrode 52 through the contact hole 56 .
- the gate wiring 130 is connected to the gate conductive portion 44 .
- FIG. 5 is a diagram showing an example of a bb cross section in FIG.
- the bb cross section is the YZ plane passing through the contact hole 54 .
- the dimensions in FIG. 5 do not necessarily match the dimensions in FIG.
- Semiconductor device 100 of this example has semiconductor substrate 10 , interlayer insulating film 38 , emitter electrode 52 , collector electrode 24 and protective film 150 in the cross section. 5, illustration of the vicinity of the lower surface 23 of the semiconductor substrate 10 is omitted.
- the upper surface 21 of the semiconductor substrate 10 is connected to the emitter electrode 52 through the contact hole 54 .
- FIG. 6 is a diagram showing an example of a cc cross section in FIG.
- the cc cross section is the YZ plane passing through the straight portion 39 of the gate trench portion 40 . Note that the dimensions in FIG. 6 do not necessarily match the dimensions in FIG.
- Semiconductor device 100 of this example has semiconductor substrate 10 , interlayer insulating film 38 , emitter electrode 52 , collector electrode 24 and protective film 150 in the cross section. 6, illustration of the vicinity of the lower surface 23 of the semiconductor substrate 10 is omitted.
- the gate wiring 130 is connected to the gate conductive portion 44 .
- a thin insulating film 43 is provided between the gate polysilicon 46 and the peripheral well region 11 .
- the insulating film 43 is provided when the gate insulating film 42 and the dummy insulating film 32 are formed.
- a hole current flows from the edge termination structure 90 to the emitter electrode 52 .
- the hole current increases the potential of the outer well region 11 , generating a potential difference between the gate polysilicon 46 and the outer well region 11 .
- the thin insulating film 43 exists between the gate polysilicon 46 and the outer peripheral well region 11, the insulating film 43 may be destroyed by the potential difference. For example, if the potential difference exceeds 80 V, dielectric breakdown may occur in the insulating film 43 between the gate polysilicon 46 and the outer well region 11, causing chip failure.
- FIG. 7 is a diagram showing an example of an embodiment of area D in FIG.
- FIG. 7 is an enlarged view of area D in FIG.
- the semiconductor device 100 of FIG. 7 differs from the semiconductor device 100 of FIG. 2 in the configuration of the gate polysilicon 46 .
- Other configurations of the semiconductor device 100 of FIG. 7 may be the same as those of the semiconductor device 100 of FIG.
- a plurality of gate polysilicon 46 are provided.
- a plurality of gate polysilicon 46 are provided along the extending direction (X-axis direction) of the gate wiring 130 .
- the gate polysilicon 46 is discretely provided along the extending direction of the gate wiring 130 .
- a plurality of gate polysilicon 46 are provided along the edge (first edge 161 in FIG. 1). By providing a plurality of gate polysilicon 46, the area where the gate polysilicon 46 is provided can be reduced in top view.
- the plurality of gate polysilicon 46 connect the plurality of gate trench portions 40 to the gate wiring 130 respectively.
- at least one gate trench portion 40 of the plurality of gate trench portions 40 is connected to one gate polysilicon 46 of the plurality of gate polysilicon 46 . That is, one gate trench portion 40 is connected to one gate polysilicon 46 .
- one gate trench portion 40 is connected to one gate polysilicon 46 at the tip portion 41 . With such a configuration, even if the gate polysilicon 46 is discretely provided, the gate conductive portion 44 and the gate wiring 130 can be electrically connected.
- the width D1 in the array direction of the gate trench portion 40 including the two straight portions 39 may be larger than the width D2 of the gate polysilicon 46 connecting to the gate trench portion 40 in the array direction.
- the gate polysilicon 46 can be provided only in the region overlapping the gate trench portion 40 in the arrangement direction, and the area where the gate polysilicon 46 is provided can be reduced in top view.
- Width D2 is preferably large. Width D2 may be 50% or more of width D1. Width D2 may be 80% or more of width D1.
- the gate polysilicon 46 has a longitudinal length in the direction from the gate wiring 130 toward the gate trench portion 40 .
- the gate polysilicon 46 has a length in the extending direction of the gate trench portion 40 .
- the gate polysilicon 46 is elongated in the Y-axis direction.
- FIG. 8 is a diagram showing an example of a dd cross section in FIG.
- the dd cross section is the YZ plane passing through the contact hole 56 . Since the gate polysilicon 46 is provided below the first wiring 131 of the gate wiring 130 in this cross section, it is the same as in FIG. Therefore, in this section, the gate wiring 130 is connected to the gate conductive portion 44 .
- FIG. 9 is a diagram showing an example of the ee cross section in FIG.
- the ee cross section is the YZ plane passing through the contact hole 54 .
- the cross section of FIG. 9 differs from that of FIG. 5 in that gate polysilicon 46 is not provided.
- Other configurations of the cross section of FIG. 9 may be the same as those of FIG.
- the area where the gate polysilicon 46 is provided is reduced in top view. Since the gate polysilicon 46 is not provided in the cross section of FIG. Therefore, even if the potential of the outer well region 11 rises due to the hole current, the insulating film between the gate wiring 130 and the outer well region 11 can be prevented from being destroyed.
- FIG. 10 is a diagram showing an example of the ff section in FIG.
- the ff cross section is the YZ plane passing through the straight portion 39 of the gate trench portion 40 .
- the cross section of FIG. 10 differs from that of FIG. 6 in that gate polysilicon 46 is not provided.
- Other configurations of the cross section of FIG. 10 may be the same as those of FIG. Since the gate polysilicon 46 is not provided in this section, the gate wiring 130 is not connected to the gate conductive portion 44 .
- FIG. 11 is a diagram showing another example of the embodiment of area D in FIG.
- FIG. 11 is an enlarged view of area D in FIG.
- the semiconductor device 100 of FIG. 11 differs from the semiconductor device 100 of FIG. 7 in the configuration of the gate polysilicon 46 and the gate trench portion 40 .
- Other configurations of the semiconductor device 100 of FIG. 11 may be the same as those of the semiconductor device 100 of FIG.
- the gate trench portion 40 is provided extending to the gate wiring 130 . At least part of the gate trench portion 40 is provided to extend below the gate wiring 130 . In FIG. 11, the tip portion 41 of the gate trench portion 40 overlaps the gate wiring 130 when viewed from above. By providing at least a portion of the gate trench portion 40 up to the gate wiring 130, the area for providing the gate polysilicon 46 can be further reduced when viewed from above. Therefore, it is possible to increase the area where the thick insulating film is provided between the gate wiring 130 and the outer peripheral well region 11 as shown in the cross section of FIG.
- FIG. 12 is a diagram showing an example of the hh cross section in FIG.
- the hh cross section is the YZ plane passing through the contact hole 56 .
- the cross section of FIG. 12 differs from the cross section of FIG. 8 in the configuration of gate polysilicon 46 and gate trench portion 40 .
- Other configurations of the cross section of FIG. 12 may be the same as those of the cross section of FIG.
- the gate polysilicon 46 is provided between the gate trench portion 40 and the gate wiring 130 in the depth direction. With such a configuration, the area where the gate polysilicon 46 is provided can be further reduced when viewed from above. Further, in order to further reduce the area where the gate polysilicon 46 is provided when viewed from above, the gate polysilicon 46 is preferably provided only between the gate trench portion 40 and the gate wiring 130 .
- FIG. 13 is a diagram showing another example of the embodiment of area D in FIG.
- the semiconductor device 100 of FIG. 13 differs from the semiconductor device 100 of FIG. 7 in the configuration of the gate polysilicon 46 and the gate trench portion 40 .
- Other configurations of the semiconductor device 100 of FIG. 13 may be the same as those of the semiconductor device 100 of FIG.
- the gate trench portion 40 of this example has only one linear portion 39 extending along the extending direction perpendicular to the arrangement direction.
- the linear portion 39 of one gate trench portion 40 is connected to one gate polysilicon 46 .
- the width D3 of the gate trench portion 40 in the arrangement direction is larger than the width D4 of the gate polysilicon 46 connected to the gate trench portion in the arrangement direction.
- the gate polysilicon 46 can be provided only in the region overlapping the gate trench portion 40 in the arrangement direction, and the area where the gate polysilicon 46 is provided can be reduced in top view. Therefore, the region where the thick insulating film is provided between the gate wiring 130 and the outer peripheral well region 11 can be increased, and the breakage of the insulating film at the time of turn-off can be suppressed.
- Width D4 is preferably large. Width D4 may be 50% or more of width D3. Width D4 may be 80% or more of width D3.
- the gate polysilicon 46 has a longitudinal length in the direction from the gate wiring 130 toward the gate trench portion 40 .
- the gate polysilicon 46 has a length in the extending direction of the gate trench portion 40 .
- the gate polysilicon 46 is elongated in the Y-axis direction.
- FIG. 14 is a diagram showing a comparative example of area E in FIG.
- FIG. 2 is an enlarged view of area E in FIG.
- a region E is a region including the transistor portion 70 near the curved portion 133 of the gate wiring 130 .
- the semiconductor device 100 of this example includes a gate trench portion 40 , a dummy trench portion 30 and an outer peripheral well region 11 provided inside the upper surface side of the semiconductor substrate 10 .
- emitter region 12 and contact region 15 are omitted.
- the gate polysilicon 46 is provided along the curved portion 133 of the gate wiring 130 . Therefore, gate polysilicon 46 also has a curve. A tip portion 41 of the gate trench portion 40 is provided along the gate polysilicon 46 .
- the outer well region 11 may be provided stepwise as shown in FIG. In the comparative example, the gate polysilicon 46 is continuously provided in the X-axis direction.
- FIG. 15 is a diagram showing an example of an embodiment of area E in FIG.
- FIG. 15 is an enlarged view of area E in FIG.
- the semiconductor device 100 of FIG. 15 differs from the semiconductor device 100 of FIG. 14 in the configuration of the gate polysilicon 46 .
- Other configurations of the semiconductor device 100 of FIG. 15 may be the same as those of the semiconductor device 100 of FIG.
- a plurality of gate polysilicon 46 are provided.
- a plurality of gate polysilicon 46 are provided along the arrangement direction (X-axis direction) perpendicular to the extending direction of the gate trench portion 40 .
- the gate polysilicon 46 is discretely provided along the X-axis direction.
- a plurality of gate polysilicon 46 are provided along the curved portion 133 of the gate wiring 130 .
- one gate trench portion 40 is connected to one gate polysilicon 46 at the tip portion 41. As shown in FIG.
- the width D5 in the array direction of the gate trench portion 40 including the two straight portions 39 may be larger than the width D6 of the gate polysilicon 46 connected to the gate trench portion 40 in the array direction.
- the gate polysilicon 46 can be provided only in the region overlapping the gate trench portion 40 in the arrangement direction, and the area where the gate polysilicon 46 is provided can be reduced in top view. Therefore, the region where the thick insulating film is provided between the gate wiring 130 and the outer peripheral well region 11 can be increased, and the breakage of the insulating film at the time of turn-off can be suppressed.
- Width D6 is preferably large. Width D6 may be 50% or more of width D5. Width D6 may be 80% or more of width D5.
- the gate polysilicon 46 has a longitudinal length in the direction from the gate wiring 130 toward the gate trench portion 40 .
- the gate polysilicon 46 has a length in the extending direction of the gate trench portion 40 .
- the gate polysilicon 46 is elongated in the Y-axis direction.
- FIG. 16 is a diagram showing another example of the embodiment of area E in FIG. FIG. 16 is an enlarged view of area E in FIG.
- the semiconductor device 100 of FIG. 16 differs from the semiconductor device 100 of FIG. 15 in the configuration of the gate polysilicon 46 .
- Other configurations of the semiconductor device 100 of FIG. 16 may be the same as those of the semiconductor device 100 of FIG.
- the gate polysilicon 46 in FIG. 16 is defined as gate polysilicon 46-1, gate polysilicon 46-2, and gate polysilicon 46-3 from the negative side in the X-axis direction.
- the longitudinal directions of the gate polysilicon 46 are defined as longitudinal direction E1, longitudinal direction E2, and longitudinal direction E3, respectively.
- the extending directions of the portion of the gate wiring 130 connected to each gate polysilicon 46 are assumed to be an extending direction E4, an extending direction E5, and an extending direction E6, respectively.
- each gate polysilicon 46 is changed based on the extension direction of the portion of the gate wiring 130 connected to the gate polysilicon 46 .
- the longitudinal direction of each gate polysilicon 46 is changed so as to be substantially perpendicular to the extending direction of the portion of the gate wiring 130 connected to the gate polysilicon 46 .
- Substantially vertical may include an error of ⁇ 10% with respect to the vertical. Therefore, the angle formed between the longitudinal direction and the extending direction of the gate trench portion 40 becomes smaller in the order of the gate polysilicon 46-1, the gate polysilicon 46-2, and the gate polysilicon 46-3.
- the longitudinal directions of at least two gate polysilicon 46 have different angles with respect to the extension direction (Y-axis direction) of the gate trench portion 40 .
- an angle ⁇ 2 formed between the longitudinal direction E2 of the gate polysilicon 46-2 and the extending direction of the gate trench portion 40 and an angle ⁇ 3 formed between the longitudinal direction E3 of the gate polysilicon 46-3 and the extending direction of the gate trench portion 40 are different.
- the angle ⁇ 1 formed between the longitudinal direction E1 of the gate polysilicon 46-1 and the extending direction of the gate trench portion 40 and the angle ⁇ 2 formed between the longitudinal direction E2 of the gate polysilicon 46-2 and the extending direction of the gate trench portion 40 are different. may be the same.
- the angles ⁇ 1, ⁇ 2, and ⁇ 3 may be different from each other.
- FIG. 17 is a diagram showing another example of the embodiment of area E in FIG.
- FIG. 17 is an enlarged view of area D in FIG.
- Semiconductor device 100 of FIG. 18 differs from semiconductor device 100 of FIG. 15 in the configuration of gate polysilicon 46 and gate trench portion 40 .
- Other configurations of the semiconductor device 100 of FIG. 18 may be the same as those of the semiconductor device 100 of FIG.
- the gate trench portion 40 is provided extending to the gate wiring 130 . At least part of the gate trench portion 40 is provided to extend below the gate wiring 130 . In FIG. 18, the tip portion 41 of the gate trench portion 40 overlaps the gate wiring 130 when viewed from above.
- the area for providing the gate polysilicon 46 can be further reduced when viewed from above. Therefore, the region where the thick insulating film is provided between the gate wiring 130 and the outer peripheral well region 11 can be increased, and the breakage of the insulating film at the time of turn-off can be suppressed.
- the gate polysilicon 46 may be provided between the gate trench portion 40 and the gate wiring 130 in the depth direction.
- region D and the examples of region E may be combined as appropriate.
- the embodiment of FIG. 7 and the embodiment of FIG. 16 are combined.
- the extending direction of the gate wiring 130 is substantially perpendicular to the longitudinal direction of each gate polysilicon 46 . 7 in the vicinity of the first wiring 131, and the configuration in FIG. , the longitudinal direction of each gate polysilicon 46 can be varied.
- each gate trench portion 40 and the gate wiring 130 can be connected at the shortest distance.
- the longitudinal direction of the gate polysilicon 46 connected to the first wiring 131 and the longitudinal direction of the gate polysilicon 46 connected to the curved portion 133 are different.
- FIG. 7 and the embodiment of FIG. 17 may be combined.
- at least part of the gate trench portion 40 is provided to extend below the curved portion 133 of the gate wiring 130 .
- at least one gate polysilicon 46 is provided between the gate trench portion 40 and the curved portion 133 in the depth direction.
- at least one gate polysilicon 46 has a longitudinal length in the direction from the first wiring 131 of the gate wiring 130 toward the gate trench portion 40 . Examples of combinations of embodiments are not limited to these.
- FIG. 18 is a diagram showing an example of the edge termination structure portion 90.
- FIG. FIG. 18 shows an edge termination structure 90 near cross-section cc of FIG.
- Edge termination structure 90 includes polysilicon 47 , a plurality of guard rings 92 , an oxide layer 94 and a field plate 96 .
- Each guard ring 92 may be provided so as to surround the active portion 160 on the upper surface 21 .
- the plurality of guard rings 92 may have the function of extending the depletion layer generated in the active portion 160 to the outside of the semiconductor substrate 10 . As a result, electric field concentration inside the semiconductor substrate 10 can be prevented, and the breakdown voltage of the semiconductor device 100 can be improved.
- the guard ring 92 of this example is a P+ type semiconductor region formed near the upper surface 21 by ion irradiation.
- the depth of the bottom of guard ring 92 may be deeper than the depth of the bottoms of gate trench portion 40 and dummy trench portion 30 .
- Field plate 96 is formed of a conductive material such as metal. Field plate 96 may be formed of the same material as emitter electrode 52 . Field plate 96 is provided on interlayer insulating film 38 . Field plate 96 is connected to guard ring 92 through polysilicon 47 . As described above, in the edge termination structure 90, a hole current flows from the edge termination structure 90 to the emitter electrode 52 during turn-off.
- FIG. 19 is a diagram showing an example of the ii section in FIG.
- the ii section is the XZ plane passing through the second wiring 132 of the gate wiring 130 . Note that each dimension in FIG. 19 does not necessarily match those in other drawings.
- the gate trench portion 40 is not connected to the gate wiring 130 in this cross section. Therefore, gate polysilicon 46 is not provided.
- the gate polysilicon 46 does not have to be provided below the second wiring 132 of the gate wiring 130 .
- the gate polysilicon 46 may be provided below the first wiring 131 of the gate wiring 130 .
- DESCRIPTION OF SYMBOLS 10 Semiconductor substrate, 11. Perimeter well region, 12. Emitter region, 14. Base region, 15. Contact region, 18. Drift region, 20. Buffer region, 21.. Upper surface, 22. collector region 23 lower surface 24 collector electrode 30 dummy trench portion 32 dummy insulating film 34 dummy conductive portion 36 dummy polysilicon 38 interlayer insulating film 39... straight portion, 40... gate trench portion, 41... tip portion, 42... gate insulating film, 43... insulating film, 44... gate conductive portion, 46... gate polysilicon, 47...
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Electrodes Of Semiconductors (AREA)
Abstract
Description
特許文献1 特開2018-206873号公報
特許文献2 国際公開第2016-098409号公報
特許文献3 特開2017-135245号公報
Claims (12)
- 半導体基板を備える半導体装置であって、
前記半導体基板は、
活性部と、
前記半導体基板の上面において前記活性部に設けられ、延伸方向に沿って延伸する複数のゲートトレンチ部と
を有し、
前記活性部と前記半導体基板の端辺との間に設けられるゲート配線と、
前記端辺に沿って互いに離れて配置され、前記複数のゲートトレンチ部をそれぞれ前記ゲート配線に接続する複数のゲートポリシリコンと
を更に備える半導体装置。 - 前記複数のゲートトレンチ部の内少なくとも1つのゲートトレンチ部は、前記複数のゲートポリシリコンの内1つのゲートポリシリコンと接続する
請求項1に記載の半導体装置。 - 少なくとも1つの前記ゲートトレンチ部は、
前記延伸方向に沿って延伸する2つの直線部分と、
前記2つの直線部分を接続する先端部と
を有し、
前記2つの直線部分を含む前記ゲートトレンチ部の、前記延伸方向と垂直な配列方向における幅は、前記配列方向における当該前記ゲートトレンチ部と接続する前記ゲートポリシリコンの幅より大きい
請求項2に記載の半導体装置。 - 少なくとも1つの前記ゲートトレンチ部は、前記延伸方向に沿って延伸する1つの直線部分を有し、
前記延伸方向と垂直な配列方向における前記ゲートトレンチ部の幅は、前記配列方向における当該前記ゲートトレンチ部と接続する前記ゲートポリシリコンの幅より大きい
請求項2に記載の半導体装置。 - 前記ゲートポリシリコンは、前記ゲート配線が延伸する方向に沿って、離散的に設けられている
請求項2から4のいずれか一項に記載の半導体装置。 - 前記半導体基板は、
前記延伸方向と垂直な2つの第1端辺と、
前記延伸方向と平行な2つの第2端辺と
を有し、
前記ゲート配線は、
前記第1端辺と前記活性部との間に設けられた第1配線と、
前記第2端辺と前記活性部との間に設けられた第2配線と
を有し、
前記ゲートポリシリコンは、
前記第1配線の下方に設けられ、
前記第2配線の下方に設けられない
請求項2から5のいずれか一項に記載の半導体装置。 - 前記ゲートポリシリコンは、前記ゲート配線から前記ゲートトレンチ部に向かう方向に長手を有する
請求項2から6のいずれか一項に記載の半導体装置。 - 前記ゲートポリシリコンは、前記延伸方向に長手を有する
請求項7に記載の半導体装置。 - 前記ゲートトレンチ部の少なくとも一部は、前記ゲート配線の下方まで延伸して設けられ、
前記ゲートポリシリコンは、深さ方向において前記ゲートトレンチ部と前記ゲート配線の間に設けられる
請求項2から6のいずれか一項に記載の半導体装置。 - 少なくとも2つの前記ゲートポリシリコンの長手方向は、前記延伸方向との成す角度が異なる
請求項2から9のいずれか一項に記載の半導体装置。 - 前記半導体基板は、
前記延伸方向と垂直な2つの第1端辺と、
前記延伸方向と平行な2つの第2端辺と
を有し、
前記ゲート配線は、
前記第1端辺と前記活性部との間に設けられた第1配線と、
前記第2端辺と前記活性部との間に設けられた第2配線と、
前記第1配線および前記第2配線を接続する曲線部分と
を有し、
前記第1配線に接続する前記ゲートポリシリコンの長手方向と、前記曲線部分に接続する前記ゲートポリシリコンの長手方向とが異なる
請求項10に記載の半導体装置。 - 前記半導体基板は、
前記延伸方向と垂直な2つの第1端辺と、
前記延伸方向と平行な2つの第2端辺と
を有し、
前記ゲート配線は、
前記第1端辺と前記活性部との間に設けられた第1配線と、
前記第2端辺と前記活性部との間に設けられた第2配線と、
前記第1配線および前記第2配線を接続する曲線部分と
を有し、
前記ゲートトレンチ部の少なくとも一部は、前記ゲート配線の前記曲線部分の下方まで延伸して設けられ、
少なくとも1つの前記ゲートポリシリコンは、深さ方向において前記ゲートトレンチ部と前記曲線部分の間に設けられ、
少なくとも1つの前記ゲートポリシリコンは、前記ゲート配線の前記第1配線から前記ゲートトレンチ部に向かう方向に長手を有する
請求項2に記載の半導体装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112022000136.4T DE112022000136T5 (de) | 2021-05-24 | 2022-03-30 | Halbleitervorrichtung |
CN202280007099.0A CN116457944A (zh) | 2021-05-24 | 2022-03-30 | 半导体装置 |
JP2023524066A JPWO2022249753A1 (ja) | 2021-05-24 | 2022-03-30 | |
US18/304,377 US20230261096A1 (en) | 2021-05-24 | 2023-04-21 | Semiconductor device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021087222 | 2021-05-24 | ||
JP2021-087222 | 2021-05-24 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US18/304,377 Continuation US20230261096A1 (en) | 2021-05-24 | 2023-04-21 | Semiconductor device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022249753A1 true WO2022249753A1 (ja) | 2022-12-01 |
Family
ID=84228642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2022/016190 WO2022249753A1 (ja) | 2021-05-24 | 2022-03-30 | 半導体装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20230261096A1 (ja) |
JP (1) | JPWO2022249753A1 (ja) |
CN (1) | CN116457944A (ja) |
DE (1) | DE112022000136T5 (ja) |
WO (1) | WO2022249753A1 (ja) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004221230A (ja) * | 2003-01-14 | 2004-08-05 | Toyota Industries Corp | トレンチ構造を有する半導体装置 |
JP2014053552A (ja) * | 2012-09-10 | 2014-03-20 | Toyota Motor Corp | 半導体装置 |
WO2015019862A1 (ja) * | 2013-08-06 | 2015-02-12 | 富士電機株式会社 | トレンチゲートmos型半導体装置およびその製造方法 |
JP2017112134A (ja) * | 2015-12-14 | 2017-06-22 | 富士電機株式会社 | 半導体装置 |
JP2018157200A (ja) * | 2017-03-15 | 2018-10-04 | 富士電機株式会社 | 半導体装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017013524A (ja) | 2015-06-26 | 2017-01-19 | ヤマハ発動機株式会社 | 電動補助自転車 |
JP7087280B2 (ja) | 2017-05-31 | 2022-06-21 | 富士電機株式会社 | 炭化珪素半導体装置および炭化珪素半導体装置の製造方法 |
-
2022
- 2022-03-30 WO PCT/JP2022/016190 patent/WO2022249753A1/ja active Application Filing
- 2022-03-30 CN CN202280007099.0A patent/CN116457944A/zh active Pending
- 2022-03-30 JP JP2023524066A patent/JPWO2022249753A1/ja active Pending
- 2022-03-30 DE DE112022000136.4T patent/DE112022000136T5/de active Pending
-
2023
- 2023-04-21 US US18/304,377 patent/US20230261096A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004221230A (ja) * | 2003-01-14 | 2004-08-05 | Toyota Industries Corp | トレンチ構造を有する半導体装置 |
JP2014053552A (ja) * | 2012-09-10 | 2014-03-20 | Toyota Motor Corp | 半導体装置 |
WO2015019862A1 (ja) * | 2013-08-06 | 2015-02-12 | 富士電機株式会社 | トレンチゲートmos型半導体装置およびその製造方法 |
JP2017112134A (ja) * | 2015-12-14 | 2017-06-22 | 富士電機株式会社 | 半導体装置 |
JP2018157200A (ja) * | 2017-03-15 | 2018-10-04 | 富士電機株式会社 | 半導体装置 |
Also Published As
Publication number | Publication date |
---|---|
CN116457944A (zh) | 2023-07-18 |
DE112022000136T5 (de) | 2023-06-15 |
JPWO2022249753A1 (ja) | 2022-12-01 |
US20230261096A1 (en) | 2023-08-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP7268743B2 (ja) | 半導体装置 | |
US11532738B2 (en) | Semiconductor device | |
JP7272454B2 (ja) | 半導体装置および半導体装置の製造方法 | |
US20230261095A1 (en) | Semiconductor device | |
JP7211516B2 (ja) | 半導体装置 | |
US20230124922A1 (en) | Semiconductor device | |
US20230268342A1 (en) | Semiconductor device | |
US20230039920A1 (en) | Semiconductor device | |
WO2022249753A1 (ja) | 半導体装置 | |
US11257910B2 (en) | Semiconductor device including transistor portion and diode portion | |
US20240088276A1 (en) | Semiconductor apparatus and method for manufacturing semiconductor apparatus | |
WO2023224059A1 (ja) | 半導体装置 | |
WO2023140254A1 (ja) | 半導体装置 | |
JP7468786B2 (ja) | 半導体装置および製造方法 | |
WO2023139931A1 (ja) | 半導体装置 | |
JP7231065B2 (ja) | 半導体装置 | |
WO2023063411A1 (ja) | 半導体装置 | |
WO2023199932A1 (ja) | 半導体装置および製造方法 | |
WO2023063412A1 (ja) | 半導体装置および半導体装置の製造方法 | |
US20240055483A1 (en) | Semiconductor device | |
WO2023145805A1 (ja) | 半導体装置および製造方法 | |
US20240079481A1 (en) | Semiconductor device | |
US20230282737A1 (en) | Semiconductor device | |
US20240072110A1 (en) | Semiconductor device and manufacturing method of semiconductor device | |
JP7231064B2 (ja) | 半導体装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22811027 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280007099.0 Country of ref document: CN |
|
ENP | Entry into the national phase |
Ref document number: 2023524066 Country of ref document: JP Kind code of ref document: A |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 22811027 Country of ref document: EP Kind code of ref document: A1 |