WO2002097888A1 - Dispositif semi-conducteur de puissance - Google Patents
Dispositif semi-conducteur de puissance Download PDFInfo
- Publication number
- WO2002097888A1 WO2002097888A1 PCT/JP2001/004383 JP0104383W WO02097888A1 WO 2002097888 A1 WO2002097888 A1 WO 2002097888A1 JP 0104383 W JP0104383 W JP 0104383W WO 02097888 A1 WO02097888 A1 WO 02097888A1
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- WIPO (PCT)
- Prior art keywords
- region
- silicon carbide
- conductivity type
- carbide substrate
- semiconductor device
- Prior art date
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 55
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 97
- 239000000758 substrate Substances 0.000 claims abstract description 87
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 83
- 238000002955 isolation Methods 0.000 claims abstract description 15
- 210000000746 body region Anatomy 0.000 claims description 46
- 239000012535 impurity Substances 0.000 claims description 10
- 239000002019 doping agent Substances 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 17
- 229910052710 silicon Inorganic materials 0.000 description 17
- 239000010703 silicon Substances 0.000 description 17
- 230000015572 biosynthetic process Effects 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 229910052814 silicon oxide Inorganic materials 0.000 description 8
- 230000015556 catabolic process Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000005468 ion implantation Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000000407 epitaxy Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000002230 thermal chemical vapour deposition Methods 0.000 description 1
Classifications
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- 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
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/7801—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
- H01L29/7802—Vertical DMOS transistors, i.e. VDMOS transistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/8213—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using SiC technology
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
- H01L21/8232—Field-effect technology
- H01L21/8234—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type
- H01L21/823487—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type with a particular manufacturing method of vertical transistor structures, i.e. with channel vertical to the substrate surface
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body
- H01L27/08—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including only semiconductor components of a single kind
- H01L27/085—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only
- H01L27/088—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate
-
- 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
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/16—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only elements of Group IV of the Periodic Table
- H01L29/1608—Silicon carbide
Definitions
- the present invention relates to a power semiconductor device, and more particularly to a power semiconductor device using a vertical power MOSFET.
- FIG. 6 is a cross-sectional view of an n-channel vertical power MOS FET indicated by 200 as a whole using a silicon substrate.
- an 11-type epitaxy layer 202 is formed on an n-type silicon substrate 201.
- an 11-type epitaxy layer 202 is formed in the epitaxial layer 202.
- two: type body regions 203 are formed using a force diffusion method.
- an n-type doped region 204 is formed in each body region 203.
- a source electrode 205 is provided on the n-type doped region 204. Further, a gate electrode 207 is provided on body region 203 sandwiched between epitaxy layer 202 and n-type doped region 204 via insulating layer 206. On the other hand, on the back surface of the n-type silicon substrate 201, a drain electrode 208 is provided on the back surface of the n-type silicon substrate 201.
- the drain electrode 208 to the source electrode 20 In the vertical power M ⁇ S FET 200, the drain electrode 208 to the source electrode 20
- the current flowing through 5 can be controlled by the voltage applied to the gate electrode 207.
- the source-drain breakdown voltage is determined by the avalanche voltage of the pn junction between the p-type body region 203 and the n-type epitaxial layer 202.
- the thickness of the vertical power MOSFET 200 is usually about 600 ⁇ .
- Two vertical power M ⁇ S FETs of ⁇ channel and n channel When forming a power semiconductor device provided in a semiconductor device, it is necessary to provide an isolation region extending from the front surface to the back surface of the MOS SFET, and to electrically isolate adjacent vertical power M ⁇ SFETs. Such an isolation region is formed by forming a groove so as to reach from the front surface of the MS FET to the back surface of the substrate, and then filling the groove with silicon oxide or the like.
- an object of the present invention is to provide a power semiconductor device in which a plurality of MOSFETs including a vertical MOSFET are formed on one substrate.
- the present invention relates to a semiconductor device in which a plurality of MOSFETs including a vertical MOSFET are formed on the same substrate, and a silicon carbide substrate having a front surface and a back surface facing each other; And a first MOSFET and a second MOSFET provided on both sides of the isolation region, respectively.
- the first MOSFET includes a first conductivity type silicon carbide substrate, a second conductivity type body region provided on the front side of the silicon carbide substrate, and a second conductivity type body region provided in the pod region.
- a vertical MOSFET including a doped region of one conductivity type, the second MOSFET having a second MOSFET type, a silicon carbide substrate of a second conductivity type, and a first MOSFET provided on the surface side of the silicon carbide substrate.
- a vertical MO SFET including a body region of a conductivity type and a doped region of a second conductivity type provided in the body region.
- the silicon carbide substrate and the doped region And a current flowing between the semiconductor device and the semiconductor device is controlled by a gate electrode formed on the body region.
- such two vertical MOSFETs can be formed on one silicon carbide substrate.
- the silicon carbide substrate of the first MO SFET includes a region with a high impurity concentration of the first conductivity type on the back surface side
- the silicon carbide substrate of the second MOSFET has the following structure:
- the back surface may include a high-conductivity-type high-concentration region of the second conductivity type.
- a good ohmic contact can be made between the silicon carbide substrate and the drain electrode.
- the common drain electrode of the first and second MOSFETs may be provided so as to cover the back surface of the silicon carbide substrate.
- the first and second MOS FETs include a wiring layer for connecting the MOS FETs on the surface.
- the manufacturing process of the semiconductor device can be simplified, and the semiconductor device can be easily mounted on a printed circuit board or the like.
- the present invention is characterized in that the first MOSFET comprises: the first conductive type silicon carbide substrate; a second conductive type body region provided on the front surface side of the silicon carbide substrate; Vertical M ⁇ SFET including a first conductivity type doped region provided in the region
- the second MOS FET comprises: the first conductive type silicon carbide substrate; a second conductive type body region provided on the back surface side of the carbonized silicon substrate;
- a semiconductor device is characterized in that the current is controlled by a good electrode formed on the body region.
- such two vertical MOS FETs can be formed on one silicon carbide substrate.
- the silicon carbide substrate of the first MOSFET includes a region having a high impurity concentration of a first conductivity type on the back surface side, and the silicon carbide substrate of the second MOSFET is formed on the front surface side.
- a region having a high impurity concentration of the first conductivity type may be included.
- a good ohmic contact can be made between the silicon carbide substrate and the drain electrode.
- the first and second M ⁇ S FETs are also vertical power M ⁇ S FETs for electric power. .
- the present invention provides the above-mentioned first MOS FET, wherein the first conductive type silicon carbide substrate, a second conductive type body region provided on the surface side of the silicon carbide substrate, A vertical MOSFET including a first conductivity type doped region provided in a body region, wherein the second MOSFET includes a second conductivity type silicon carbide substrate; A lateral MOS FET including a source region and a drain region of a first conductivity type provided on the surface side, wherein the first MOS FET flows between the silicon carbide substrate and the doped region; A current is controlled by a gate electrode formed on the body region, and a current flowing between the source region and the drain region in the second MOSFET is controlled by a gate electrode. It is also a semiconductor device.
- the second MO SFET is preferably a lateral MO SFET having an LDD structure.
- FIG. 1 is a sectional view of a power semiconductor device according to a first embodiment of the present invention.
- FIG. 2 is a circuit diagram of the power semiconductor device according to the first embodiment of the present invention.
- FIG. 3 is a sectional view of the power semiconductor device according to the second embodiment of the present invention.
- FIG. 4 is a circuit diagram of a power semiconductor device according to the second embodiment of the present invention.
- FIG. 5 is a cross-sectional view of a power semiconductor device according to the third embodiment of the present invention.
- FIG. 6 is a cross-sectional view of a conventional vertical power MOSFET. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a cross-sectional view of a power semiconductor device according to a first embodiment of the present invention, which is indicated as a whole by 100.
- the power semiconductor device 100 includes an n-channel MOS FET 101 and a p-channel M ⁇ S FET 102 formed on one silicon carbide (SiC) substrate. These MOSFETs are power MOSFETs for electric power and have a vertical structure in which a source electrode and a drain electrode are provided on different surfaces. Such vertical power MOSFETs include, for example, a double diffused MOS (DMOS) FET, a V-shaped gate MOS (VMOS) FET, and a U-shaped gate MOS (UMOS) FET.
- DMOS double diffused MOS
- VMOS V-shaped gate MOS
- UMOS U-shaped gate MOS
- the two MOSFETs 101 and 102 are separated by an isolation region 103.
- MOSFETs 101 and 102 are enhancement type MOS FETs.
- an n-SiC layer 2 is provided on the n + SiC layer 1.
- a plurality of SiC body regions 3 are provided in the 11—SiC layer 2, and an nSiC doped region 4 is provided in the pSiC body region 3.
- a gate electrode 6 is provided via a silicon oxide 5 or the like. . Below the gate electrode 6! The SiC body region 3 becomes the channel region.
- a source electrode 7 is provided on the nSiC doped region 4. Furthermore, A p guard ring region 8 is provided so as to surround a plurality of pSiC body regions 3.
- the p-channel MOSFET 102 has the same structure as the n-channel MOSFET 101 except for the type of impurities.
- a p-SiC layer 12 is provided in the p + SiC layer 11, a plurality of nSiC body regions 13 are provided in the p-SiC layer 12, In the SiC body region 3, a pSiC doped region 14 is provided.
- a gate electrode 16 is provided on the nSiC body region 13 between the p—SiC layer 12 and the pSiC doped region 14 with an insulating film 15 interposed therebetween.
- a source electrode 17 is provided on the doped region 14.
- n guard ring region 18 is provided so as to surround a plurality of nSiC body regions 13.
- An isolation region 103 composed of an insulating region 106 such as silicon oxide is provided between the two MOS FETs 101 and 102 so as to reach from the front surface to the rear surface of the MOSFET, and the M ⁇ SFETs 101 and 102 are insulated. I have.
- a common drain electrode 10.4 for the two MOSFETs 101 and 102 is provided on the back surfaces of the MOSFETs 101 and 102. Further, on the surfaces of the MOS FETs 101 and 102, a protective film 105 made of silicon nitride: un or the like is partially provided.
- the MOSFETs 101 and 102 are formed of SiC, the pn junction between the n-SiC layer 2 and the pSiC body region 3, the p-SiC layer 12 and the nSiC body
- the breakdown electric field at the pn junction with the semiconductor region 13 is about 10 times that of the MOSFET 200 using the silicon substrate shown in FIG. 6, and the band gap is 2 to 3 times that when the silicon substrate is used. Therefore, even if the thickness t of the MOSFETs 101 and 102 is sufficiently smaller than that of the MOSFET 200, the breakdown voltage at the Dii junction can be maintained at the same level as that of the MOSFET 200.
- the thickness t is set to about 10 ⁇ , which is about 1/50 of the thickness of the MOSFET 200.
- a non-doped SiC substrate is prepared, and a non-doped SiC layer is formed thereon using a crystal growth technique to have a thickness of t.
- a drain electrode 104 is formed on the back surface of the non-doped SiC substrate.
- a groove is formed between the formation regions of T101 and T102.
- the groove is formed so that the drain electrode 104 is exposed from the surface side of the MOS FETs 101 and 102.
- the width of the groove (the distance between the two MOS FETs) is 100 ⁇ , and the depth is 10 m.
- an insulating region 106 of silicon oxide or the like is formed so as to fill the groove by using a thermal CVD method. As a result, an isolation region 103 is formed between the two MOSFETs 101 and 102.
- the film thickness t is reduced to 10 minutes as compared with the case where the silicon substrate is used. Can be around one. For this reason, the aspect ratio of the groove is reduced, and the formation of the groove, which was difficult when a silicon substrate is used, is facilitated.
- the pSiC body region 3, the nSiC doped region 4, the nSiC body region 13, and the pSiC doped region 14 are formed by using ion implantation technology. Electrodes 6 and 16, drain electrodes 7 and 17, wiring layer (not shown), etc. are formed. As a result, the power semiconductor device 100 in which the n-channel MOS FET 101 and the p-channel MOS FET 102 are integrated on the SiC substrate is completed.
- FIG. 2 is a circuit diagram of the power semiconductor device 100 shown in FIG.
- the p-channel MOS FET 102 is used for the upper arm switching element, and the n-channel M ⁇ S FET is used for the lower arm switching element.
- the source S 2 of the P-channel MOSFET 102 and the source S 1 of the n-channel MOSFET 101 are connected to the P bus and the N bus, respectively.
- Dl and D2 are connected to an externally provided load as Out.
- MOSFET 101, 1 By alternately turning on the gates G 1 and G 2 of 02, the load is connected to the N bus and the P bus alternately.
- G 1 and G 2 may be controlled by inputting separate signals, or may be of a CMOS type that inputs one control signal.
- a parasitic diode is used for the freewheeling diode (FwDi) provided between the source and the drain.
- phase switch of a three-phase inverter can be formed.
- FIG. 3 is a cross-sectional view of a power semiconductor device according to a second embodiment of the present invention, which is indicated as a whole by 150.
- the same reference numerals as those in FIG. 1 indicate the same or corresponding parts.
- the power semiconductor device 150 two n-channel MOS FETs 101a, 10
- the MOSFETs 101a and 10lb are high-power vertical power MOSFETs.
- the front surface of the MOSFET 101a is an element formation surface, and the drain electrode 104 is provided on the rear surface.
- the back surface of the MOS FET 101b is an element formation surface, and the drain electrode 107 is provided on the front surface.
- O la and 101 b are electrically isolated by an isolation region 103.
- a non-doped SiC substrate having a thickness of t is prepared, a drain electrode 104 is formed, and then an isolation region 103 is formed in the same manner as in the first embodiment.
- n-type ions are implanted into the MOSFET 101a formation region from the surface.
- N-type ions are implanted from the back into the MOSFET 101b formation region, and n +
- a pSiC body region 3, an nSiC doped region 4, a gate electrode 6, a source electrode 7, and the like are formed.
- FIG. 4 is a circuit diagram of the power semiconductor device 150 shown in FIG.
- n-channel MOS FETs 101b and 101a are used for both the upper arm switching element and the lower arm switching element.
- the MO SFETs 101a and 101b are both enhancement type.
- the source S4 of 01a is connected to the P bus and the N bus, respectively.
- S3 and D4 are connected to a load provided outside as Out.
- the load is alternately connected to the P bus and the N bus.
- a parasitic diode is used for the freewheeling diode.
- FIG. 5 is a cross-sectional view of the power semiconductor device according to the third embodiment of the present invention, which is indicated by reference numeral 160 as a whole. 'In FIG. 5, the same reference numerals as those in FIG. 1 indicate the same or corresponding parts.
- the power semiconductor device 160 two n-channel MOSFETs 101c, 10c
- the MOSFET 101c is a high-output vertical power MOS FET, and the MOSFET 101 is an offset-gate horizontal MOS FET.
- n + SiC) i U and n-SiC layer 2 are provided.
- a plurality of pSiC body regions 3 are provided in the n-SiC layer 2, and an nSiC doped region 4 is provided in the pSiC body region 3. I have.
- a gate electrode 6 is provided via an insulating film 5 such as silicon oxide. Below the gate electrode 6! The SiC body region 3 becomes the channel region. Further, a source electrode 7 is provided on the nSiC doped region 4, and a drain electrode 104 is provided on the back surface of the li + SiC layer 1.
- the P + SiC layer 11 is provided on the p + SiC layer 11.
- the n + SiC source A Z drain region 20 and an n + S iC region 21 are provided to form an LDD structure.
- a p + S i C region 22 is provided between the n + S i C region 21, a p + S i C region 22 is provided.
- a gate electrode 26 is provided on the p + S iC region 22 via an insulating film 25 such as silicon oxide, and an insulating film 27 such as Si 2 is provided thereon.
- a drain electrode 23 and a source electrode 24 are provided on the n + SiC source / drain region 20, a drain electrode 23 and a source electrode 24 are provided.
- an isolation region 103 composed of an insulating region 106 such as silicon oxide is provided so as to reach from the surface of the MOS FET to the back surface.
- a protective film 105 made of silicon nitride or the like is partially provided on the surfaces of the MOS FETs 101c and 101d.
- a non-doped SiC substrate is prepared, and a non-doped SiC layer is formed thereon by using a crystal growth technique to have a film thickness t.
- 11 + 31 layers 1 and n-SiC layers 2 are formed in the formation region of the n-channel MOSFET 101 by, for example, an ion implantation method using nitrogen as a dopant. Further, a + SiC layer 11 and a p-SiC layer 12 are formed in a formation region of the p-channel MOS FET 102 by, for example, ion implantation using boron as a dopant. '
- An isolation region 103 composed of an insulating region 106 such as silicon oxide is formed between the OSFETs 101c and 101d.
- MOS FET 101c is formed using the same manufacturing process as in the first embodiment.
- a MOSFE T O ld is formed by using a manufacturing process of a normal lateral MOSFET having an LDD structure.
- the film thickness t is reduced to one tenth as compared with the case where the silicon substrate is used. Degree. For this reason, the aspect ratio of the groove is reduced, and the formation of the groove, which was difficult when a silicon substrate is used, is facilitated. You.
- a non-doped SiC substrate having a film thickness t from the beginning may be used instead of growing the non-doped SiC layer on the non-doped SiC substrate to make the film thickness t.
- the present invention provides a power semiconductor device including a plurality of vertical power MOSFETs, and can be used as a phase switching element of a high-voltage, high-current inverter.
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- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
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- Element Separation (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003500972A JP4712301B2 (ja) | 2001-05-25 | 2001-05-25 | 電力用半導体装置 |
PCT/JP2001/004383 WO2002097888A1 (fr) | 2001-05-25 | 2001-05-25 | Dispositif semi-conducteur de puissance |
EP01934340A EP1401021A4 (en) | 2001-05-25 | 2001-05-25 | SEMICONDUCTOR POWER DEVICE |
EP09161367A EP2088627B1 (en) | 2001-05-25 | 2001-05-25 | Power semiconductor device |
US10/467,344 US7235857B2 (en) | 2001-05-25 | 2001-05-25 | Power semiconductor device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2001/004383 WO2002097888A1 (fr) | 2001-05-25 | 2001-05-25 | Dispositif semi-conducteur de puissance |
Publications (1)
Publication Number | Publication Date |
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WO2002097888A1 true WO2002097888A1 (fr) | 2002-12-05 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2001/004383 WO2002097888A1 (fr) | 2001-05-25 | 2001-05-25 | Dispositif semi-conducteur de puissance |
Country Status (4)
Country | Link |
---|---|
US (1) | US7235857B2 (ja) |
EP (2) | EP2088627B1 (ja) |
JP (1) | JP4712301B2 (ja) |
WO (1) | WO2002097888A1 (ja) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005223220A (ja) * | 2004-02-06 | 2005-08-18 | Kansai Electric Power Co Inc:The | 高耐圧ワイドギャップ半導体装置及び電力装置 |
JP2005317828A (ja) * | 2004-04-30 | 2005-11-10 | Sumitomo Electric Ind Ltd | 高電圧車載電力変換用半導体装置の製造方法と高電圧車載電力変換用半導体装置 |
JP2007013003A (ja) * | 2005-07-01 | 2007-01-18 | Denso Corp | 半導体装置およびその製造方法 |
JP2008166705A (ja) * | 2006-12-06 | 2008-07-17 | Denso Corp | 半導体装置およびその製造方法 |
JP2008300423A (ja) * | 2007-05-29 | 2008-12-11 | Sanyo Electric Co Ltd | 半導体装置 |
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JP2010251793A (ja) * | 2007-11-06 | 2010-11-04 | Denso Corp | 半導体装置及びその製造方法 |
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DE102004006537B4 (de) * | 2003-02-13 | 2012-11-15 | Denso Corporation | Durch ein Siliziumkarbidsubstrat gebildete Halbleitervorrichtung und Verfahren zur Herstellung derselben |
JP4585772B2 (ja) * | 2004-02-06 | 2010-11-24 | 関西電力株式会社 | 高耐圧ワイドギャップ半導体装置及び電力装置 |
JP2005223220A (ja) * | 2004-02-06 | 2005-08-18 | Kansai Electric Power Co Inc:The | 高耐圧ワイドギャップ半導体装置及び電力装置 |
JP2005317828A (ja) * | 2004-04-30 | 2005-11-10 | Sumitomo Electric Ind Ltd | 高電圧車載電力変換用半導体装置の製造方法と高電圧車載電力変換用半導体装置 |
JP2007013003A (ja) * | 2005-07-01 | 2007-01-18 | Denso Corp | 半導体装置およびその製造方法 |
JP2008166705A (ja) * | 2006-12-06 | 2008-07-17 | Denso Corp | 半導体装置およびその製造方法 |
JP2013110429A (ja) * | 2006-12-06 | 2013-06-06 | Denso Corp | 半導体装置の製造方法 |
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CN102130552A (zh) * | 2010-01-20 | 2011-07-20 | 株式会社电装 | 车辆发电机 |
JP2011151903A (ja) * | 2010-01-20 | 2011-08-04 | Denso Corp | 車両用発電機 |
JP2014072413A (ja) * | 2012-09-28 | 2014-04-21 | Seiko Instruments Inc | 半導体集積回路装置 |
US9601580B2 (en) | 2014-03-19 | 2017-03-21 | Kabushiki Kaisha Toshiba | Semiconductor device |
US9312332B2 (en) | 2014-07-15 | 2016-04-12 | Fuji Electric Co., Ltd. | Semiconductor device and method for manufacturing the same |
JP7029778B2 (ja) | 2017-05-31 | 2022-03-04 | 株式会社テンシックス | 半導体素子及びその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1401021A1 (en) | 2004-03-24 |
EP2088627A2 (en) | 2009-08-12 |
JP4712301B2 (ja) | 2011-06-29 |
EP2088627B1 (en) | 2012-07-04 |
US20040070047A1 (en) | 2004-04-15 |
JPWO2002097888A1 (ja) | 2004-09-16 |
US7235857B2 (en) | 2007-06-26 |
EP2088627A3 (en) | 2009-09-16 |
EP1401021A4 (en) | 2008-03-26 |
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