JPWO2018012241A1 - 半導体装置およびその製造方法 - Google Patents
半導体装置およびその製造方法 Download PDFInfo
- Publication number
- JPWO2018012241A1 JPWO2018012241A1 JP2018527481A JP2018527481A JPWO2018012241A1 JP WO2018012241 A1 JPWO2018012241 A1 JP WO2018012241A1 JP 2018527481 A JP2018527481 A JP 2018527481A JP 2018527481 A JP2018527481 A JP 2018527481A JP WO2018012241 A1 JPWO2018012241 A1 JP WO2018012241A1
- Authority
- JP
- Japan
- Prior art keywords
- semiconductor
- semiconductor layer
- insulating film
- region
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004065 semiconductor Substances 0.000 title claims abstract description 441
- 238000004519 manufacturing process Methods 0.000 title claims description 25
- 239000010410 layer Substances 0.000 claims abstract description 325
- 239000000758 substrate Substances 0.000 claims abstract description 34
- 239000011229 interlayer Substances 0.000 claims abstract description 22
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 73
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 52
- 239000012535 impurity Substances 0.000 claims description 36
- 238000005468 ion implantation Methods 0.000 claims description 15
- 229910052732 germanium Inorganic materials 0.000 claims description 5
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 238000002513 implantation Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- 238000000059 patterning Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 20
- 230000005684 electric field Effects 0.000 description 18
- 230000015556 catabolic process Effects 0.000 description 16
- 238000005229 chemical vapour deposition Methods 0.000 description 9
- 229910052814 silicon oxide Inorganic materials 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 7
- 229910021480 group 4 element Inorganic materials 0.000 description 7
- 230000004913 activation Effects 0.000 description 6
- 238000000137 annealing Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000005669 field effect Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000206 photolithography Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910004140 HfO Inorganic materials 0.000 description 1
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 1
- 229910004541 SiN Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000126 substance 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
- H01L29/02—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
-
- 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
- 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
- H01L29/0623—Buried supplementary region, e.g. buried guard ring
-
- 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
- H01L29/08—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 carrying current to be rectified, amplified or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
- H01L29/0843—Source or drain regions of field-effect devices
- H01L29/0847—Source or drain regions of field-effect devices of field-effect transistors with insulated gate
- H01L29/0852—Source or drain regions of field-effect devices of field-effect transistors with insulated gate of DMOS transistors
- H01L29/0873—Drain regions
- H01L29/0878—Impurity concentration or distribution
-
- 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
- H01L29/1066—Gate region of field-effect devices with PN junction 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
- H01L29/06—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
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
-
- 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
- H01L29/161—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 including two or more of the elements provided for in group H01L29/16, e.g. alloys
- H01L29/165—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 including two or more of the elements provided for in group H01L29/16, e.g. alloys in different semiconductor regions, e.g. heterojunctions
-
- 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
- H01L29/66007—Multistep manufacturing processes
- H01L29/66053—Multistep manufacturing processes of devices having a semiconductor body comprising crystalline silicon carbide
- H01L29/66068—Multistep manufacturing processes of devices having a semiconductor body comprising crystalline silicon carbide the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
-
- 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
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66893—Unipolar field-effect transistors with a PN junction gate, i.e. JFET
-
- 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
-
- 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
- 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
- H01L29/7827—Vertical transistors
- H01L29/7828—Vertical transistors without inversion channel, e.g. vertical ACCUFETs, normally-on vertical MISFETs
-
- 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
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/78606—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device
- H01L29/78609—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device for preventing leakage current
-
- 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
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/78606—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device
- H01L29/78612—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device for preventing the kink- or the snapback effect, e.g. discharging the minority carriers of the channel region for preventing bipolar effect
-
- 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
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/78606—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device
- H01L29/78618—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device characterised by the drain or the source properties, e.g. the doping structure, the composition, the sectional shape or the contact structure
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Electrodes Of Semiconductors (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Junction Field-Effect Transistors (AREA)
Abstract
Description
発明者達は、ゲート絶縁膜の経時的な劣化が酸化膜中への電子またはホールの注入によって生じると考えた。すなわち、ゲート電極に高電界を印加した際に、電子またはホールの注入が生じる機構はFN(Fowler-Nordheim)トンネリング現象が考えられる。FNトンネリング現象に基づく、酸化膜中への電子またはホールの注入量は、酸化膜と炭化珪素のバンドオフセット、炭化珪素中の電子またはホールの有効質量、および酸化膜に印加される電界強度で規定される。
<装置構成>
図1は、本発明に係る実施の形態1の半導体装置の構成を示す断面図である。より具体的には、SiC基板上に形成されたMOS構造を有する電界効果トランジスタ(SiC−MOSFET)100の部分構成を模式的に示す断面図である。なお、図1では「ユニットセル」と呼称されるMOSの最小単位構造を示しており、実際の半導体装置は、複数のユニットセルによって構成されている。
次に、SiC−MOSFET100の製造方法について、製造工程を順に示す断面図である図4〜図10を用いて説明する。
半導体層3はエピタキシャル成長を用いず、IV族元素を半導体層2の上層部にイオン注入することで形成しても良い。イオン注入を用いる場合は、半導体層3の深さの制御が容易となる。
<装置構成>
図13は、本発明に係る実施の形態2の半導体装置の構成を示す断面図である。なお、図13においては、図1を用いて説明したSiC−MOSFET100と同一の構成については同一の符号を付し、重複する説明は省略する。
SiC−MOSFET200においても、半導体層3Aをエピタキシャル成長を用いず、IV族元素を半導体層2の上層部にイオン注入することで形成しても良い。その形成方法は実施の形態1において説明しているので、説明は省略する。
<装置構成>
図14は、本発明に係る実施の形態3の半導体装置の構成を示す断面図である。なお、なお、図14においては、図1を用いて説明したSiC−MOSFET100と同一の構成については同一の符号を付し、重複する説明は省略する。
SiC−MOSFET300においても、半導体層3および13をエピタキシャル成長を用いず、IV族元素を半導体層2の上層部にイオン注入することで形成しても良い。この場合、半導体層3と半導体層13とで、注入するIV族元素のイオン種を変え、また、半導体層3が半導体層13より深く形成されるように、注入エネルギーを変える。
<装置構成>
図16は、本発明に係る実施の形態4の半導体装置の構成を示す断面図である。なお、なお、図16においては、図14を用いて説明したSiC−MOSFET300と同一の構成については同一の符号を付し、重複する説明は省略する。
SiC−MOSFET400においても、半導体層3Aおよび13Aをエピタキシャル成長を用いず、IV族元素を半導体層2の上層部にイオン注入することで形成しても良い。
<装置構成>
図17は、本発明に係る実施の形態5の半導体装置の構成を示す断面図である。なお、なお、図17においては、図1を用いて説明したSiC−MOSFET100と同一の構成については同一の符号を付し、重複する説明は省略する。
以上説明した実施の形態1〜5においては、本発明をSiC−MOSFETに適用した構成を示したが、本発明の適用はMOSFETに限定されず、絶縁ゲート型半導体装置、例えば、IGBT(Insulated Gate Bipolar Transistor)への適用も可能である。
Claims (14)
- 半導体基板と、
前記半導体基板の第1の主面上に配設された第1導電型の第1の半導体層と、
前記第1の半導体層の上層部に選択的に複数設けられた第2導電型の第1の半導体領域と、
前記第1の半導体領域の上層部に選択的に設けられた第1導電型の第2の半導体領域と、
前記第1の半導体層の前記第1の半導体領域間に対応するJFET領域上に配置され、前記JFET領域の少なくとも一部を覆う第2の半導体層と、
前記第1の半導体領域上および前記第2の半導体層上を覆うように設けられたゲート絶縁膜と、
前記ゲート絶縁膜上に設けられたゲート電極と、
前記ゲート絶縁膜および前記ゲート電極を覆うように設けられた層間絶縁膜と、
前記ゲート絶縁膜および前記層間絶縁膜を貫通して、その底部に少なくとも前記第2の半導体領域が露出するコンタクトホールと、
前記層間絶縁膜上に設けられ、前記コンタクトホールを介して前記第2の半導体領域と電気的に接続される第1の主電極と、
前記半導体基板の第2の主面上に配設された第2の主電極と、を備え、
前記第1の半導体層は、第1のバンドギャップを有する炭化珪素半導体で構成され、
前記第2の半導体層は、前記第1のバンドギャップよりも狭い第2のバンドギャップを有する半導体で構成される、半導体装置。 - 前記第2の半導体層上に設けられ、前記第2のバンドギャップよりも狭い第3のバンドギャップを有する半導体で構成される第3の半導体層をさらに備える、請求項1記載の半導体装置。
- 前記第1の半導体領域の上層部に設けられた不純物領域をさらに有する、請求項1記載の半導体装置。
- 前記第2の半導体層は、前記JFET領域の全体を覆うように設けられる、請求項1から請求項3の何れか1項に記載の半導体装置。
- 前記第2の半導体層は、前記JFET領域の一部を覆うように設けられる、請求項1から請求項3の何れか1項に記載の半導体装置。
- 前記第1の半導体層および前記第2の半導体層は、ポリタイプが異なる炭化珪素半導体で構成される、請求項1記載の半導体装置。
- 前記第1の半導体層は、4H−SiCで構成される、請求項6記載の半導体装置。
- 前記第2の半導体層は、3C−SiCまたは6H−SiCで構成される、請求項7記載の半導体装置。
- 前記第2の半導体層は、添加されたゲルマニウム、シリコン、スズおよび炭素の何れかを含む、請求項7記載の半導体装置。
- 前記第2の半導体層は、厚さが200nm以下である請求項1記載の半導体装置。
- 前記半導体基板は、前記第1のバンドギャップを有する第1導電型の炭化珪素半導体で構成される、請求項1記載の半導体装置。
- 前記半導体基板は、前記第1のバンドギャップを有する第2導電型の炭化珪素半導体で構成される、請求項1記載の半導体装置。
- 請求項1記載の半導体装置の製造方法であって、
(a)前記半導体基板の前記第1の主面上にエピタキシャル成長により第1導電型の前記第1の半導体層を形成する工程と、
(b)前記第1の半導体層上にエピタキシャル成長によりエピタキシャル層を形成した後、前記JFET領域の少なくとも一部を覆うようにパターニングして前記第2の半導体層を形成する工程と、
(c)前記第1の半導体層の上層部に選択的に第2導電型の前記第1の半導体領域および第1導電型の前記第2の半導体領域を形成する工程と、
(d)前記第1の半導体領域上および前記第2の半導体層上を覆うように前記ゲート絶縁膜を形成する工程と、
(e)前記ゲート絶縁膜上に前記ゲート電極を形成する工程と、
(f)前記ゲート絶縁膜および前記ゲート電極を覆うように前記層間絶縁膜を形成する工程と、
(g)前記ゲート絶縁膜および前記層間絶縁膜を貫通して、その底部に少なくとも前記第2の半導体領域が露出する前記コンタクトホールを形成する工程と、
(h)前記層間絶縁膜上に、前記コンタクトホールを介して前記第2の半導体領域と電気的に接続される前記第1の主電極を形成する工程と、
(i)前記半導体基板の第2の主面上に前記第2の主電極を形成する工程と、を備え、
前記工程(a)は、
前記第1の半導体層を前記第1のバンドギャップを有する炭化珪素半導体で形成する工程を含み、
前記工程(b)は、
前記第2の半導体層を前記第1のバンドギャップよりも狭い前記第2のバンドギャップを有する半導体で形成する工程を含む、半導体装置の製造方法。 - 請求項1記載の半導体装置の製造方法であって、
(a)前記半導体基板の前記第1の主面上にエピタキシャル成長により第1導電型の前記第1の半導体層を形成する工程と、
(b)前記第1の半導体層の上層部にゲルマニウム、シリコン、スズおよび炭素の何れかをイオン注入してイオン注入層を形成した後、前記JFET領域の少なくとも一部を覆うようにパターニングして前記第2の半導体層を形成する工程と、
(c)前記第1の半導体層の上層部に選択的に第2導電型の前記第1の半導体領域および第1導電型の前記第2の半導体領域を形成する工程と、
(d)前記第1の半導体領域上および前記第2の半導体層上を覆うように前記ゲート絶縁膜を形成する工程と、
(e)前記ゲート絶縁膜上に前記ゲート電極を形成する工程と、
(f)前記ゲート絶縁膜および前記ゲート電極を覆うように前記層間絶縁膜を形成する工程と、
(g)前記ゲート絶縁膜および前記層間絶縁膜を貫通して、その底部に少なくとも前記第2の半導体領域が露出する前記コンタクトホールを形成する工程と、
(h)前記層間絶縁膜上に、前記コンタクトホールを介して前記第2の半導体領域と電気的に接続される前記第1の主電極を形成する工程と、
(i)前記半導体基板の第2の主面上に前記第2の主電極を形成する工程と、を備え、
前記工程(a)は、
前記第1の半導体層を前記第1のバンドギャップを有する炭化珪素半導体で形成する工程を含み、
前記工程(b)は、
前記イオン注入により、注入領域のバンドギャップを狭めて、前記第1のバンドギャップをよりも狭い前記第2のバンドギャップを有する炭化珪素半導体を形成する工程を含む、半導体装置の製造方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016139247 | 2016-07-14 | ||
JP2016139247 | 2016-07-14 | ||
PCT/JP2017/023023 WO2018012241A1 (ja) | 2016-07-14 | 2017-06-22 | 半導体装置およびその製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPWO2018012241A1 true JPWO2018012241A1 (ja) | 2018-11-29 |
JP6584671B2 JP6584671B2 (ja) | 2019-10-02 |
Family
ID=60951765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2018527481A Active JP6584671B2 (ja) | 2016-07-14 | 2017-06-22 | 半導体装置およびその製造方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US10510844B2 (ja) |
JP (1) | JP6584671B2 (ja) |
CN (1) | CN109417098B (ja) |
DE (1) | DE112017003513B4 (ja) |
WO (1) | WO2018012241A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5616665B2 (ja) * | 2010-03-30 | 2014-10-29 | ローム株式会社 | 半導体装置 |
JP6957536B2 (ja) * | 2019-01-04 | 2021-11-02 | 株式会社東芝 | 半導体装置、インバータ回路、駆動装置、車両、及び、昇降機 |
US12027590B2 (en) * | 2019-03-18 | 2024-07-02 | Mitsubishi Electric Corporation | Silicon carbide semiconductor device, power conversion device, and manufacturing method of silicon carbide semiconductor device |
CN113140633B (zh) * | 2020-01-17 | 2022-05-24 | 张清纯 | 一种半导体器件及其制造方法 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3428459B2 (ja) | 1998-09-01 | 2003-07-22 | 富士電機株式会社 | 炭化けい素nチャネルMOS半導体素子およびその製造方法 |
JP2000106428A (ja) * | 1998-09-28 | 2000-04-11 | Toshiba Corp | 半導体装置 |
JP2001352060A (ja) | 1999-10-19 | 2001-12-21 | Matsushita Electric Ind Co Ltd | pチャネル型電界効果トランジスタ |
JP3618319B2 (ja) | 2000-12-26 | 2005-02-09 | 松下電器産業株式会社 | 半導体装置及びその製造方法 |
DE10394372B4 (de) * | 2002-06-28 | 2011-07-28 | National Institute Of Advanced Industrial Science And Technology | Verfahren zur Herstellung einer Halbleitervorrichtung |
JP3580304B2 (ja) * | 2002-10-11 | 2004-10-20 | 日産自動車株式会社 | 炭化珪素半導体装置及びその製造方法 |
US7217950B2 (en) | 2002-10-11 | 2007-05-15 | Nissan Motor Co., Ltd. | Insulated gate tunnel-injection device having heterojunction and method for manufacturing the same |
JP4131193B2 (ja) | 2003-04-28 | 2008-08-13 | 日産自動車株式会社 | 半導体装置 |
JP4049095B2 (ja) * | 2003-12-25 | 2008-02-20 | 日産自動車株式会社 | 半導体装置及びその製造方法 |
JP2007005764A (ja) * | 2005-05-27 | 2007-01-11 | Toyota Motor Corp | 半導体装置とその製造方法 |
US8629509B2 (en) * | 2009-06-02 | 2014-01-14 | Cree, Inc. | High voltage insulated gate bipolar transistors with minority carrier diverter |
JP5433352B2 (ja) | 2009-09-09 | 2014-03-05 | 株式会社東芝 | 半導体装置の製造方法 |
US8563986B2 (en) * | 2009-11-03 | 2013-10-22 | Cree, Inc. | Power semiconductor devices having selectively doped JFET regions and related methods of forming such devices |
EP2482315B1 (en) * | 2010-10-29 | 2015-08-12 | Panasonic Intellectual Property Management Co., Ltd. | Semiconductor element |
JP5574923B2 (ja) * | 2010-11-10 | 2014-08-20 | 三菱電機株式会社 | 半導体装置およびその製造方法 |
JP5995347B2 (ja) | 2012-03-16 | 2016-09-21 | 国立研究開発法人産業技術総合研究所 | SiC半導体装置及びその製造方法 |
JP2013232564A (ja) * | 2012-04-27 | 2013-11-14 | National Institute Of Advanced Industrial & Technology | 半導体装置および半導体装置の製造方法 |
-
2017
- 2017-06-22 US US16/307,088 patent/US10510844B2/en active Active
- 2017-06-22 JP JP2018527481A patent/JP6584671B2/ja active Active
- 2017-06-22 DE DE112017003513.9T patent/DE112017003513B4/de active Active
- 2017-06-22 WO PCT/JP2017/023023 patent/WO2018012241A1/ja active Application Filing
- 2017-06-22 CN CN201780042409.1A patent/CN109417098B/zh active Active
Also Published As
Publication number | Publication date |
---|---|
DE112017003513T5 (de) | 2019-03-28 |
WO2018012241A1 (ja) | 2018-01-18 |
US20190229191A1 (en) | 2019-07-25 |
JP6584671B2 (ja) | 2019-10-02 |
DE112017003513B4 (de) | 2024-03-07 |
CN109417098B (zh) | 2022-03-01 |
US10510844B2 (en) | 2019-12-17 |
CN109417098A (zh) | 2019-03-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6759563B2 (ja) | 半導体装置および半導体装置の製造方法 | |
JP5433352B2 (ja) | 半導体装置の製造方法 | |
JP4604241B2 (ja) | 炭化ケイ素mos電界効果トランジスタおよびその製造方法 | |
JP6032831B2 (ja) | SiC半導体装置及びその製造方法 | |
WO2013001677A1 (ja) | 半導体装置とその製造方法 | |
JP6584671B2 (ja) | 半導体装置およびその製造方法 | |
JP6120525B2 (ja) | 炭化珪素半導体装置 | |
JP2009182271A (ja) | 炭化珪素半導体装置 | |
JP5995347B2 (ja) | SiC半導体装置及びその製造方法 | |
JP4996828B2 (ja) | 接合型半導体装置の製造方法 | |
CN108604600B (zh) | 碳化硅半导体装置及其制造方法 | |
JP6611943B2 (ja) | 炭化珪素半導体装置およびその製造方法 | |
JP2011091186A (ja) | 炭化珪素半導体装置の製造方法 | |
JP5676923B2 (ja) | 半導体装置の製造方法および半導体装置 | |
JP4948784B2 (ja) | 半導体装置及びその製造方法 | |
JP2019004010A (ja) | 半導体装置およびその製造方法 | |
JP2012064741A (ja) | 半導体装置およびその製造方法 | |
JP2007066959A (ja) | 炭化珪素半導体装置の製造方法 | |
JP5098293B2 (ja) | ワイドバンドギャップ半導体を用いた絶縁ゲート型半導体装置およびその製造方法 | |
JP5995701B2 (ja) | 炭化珪素半導体装置及びその製造方法 | |
JP5059989B1 (ja) | 半導体装置とその製造方法 | |
JP5684304B2 (ja) | 炭化珪素半導体装置 | |
JP2020035867A (ja) | 半導体装置の製造方法および半導体装置 | |
JP7543950B2 (ja) | 超接合炭化珪素半導体装置の製造方法 | |
JP5033316B2 (ja) | 半導体装置の製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20180724 |
|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20180724 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20190806 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20190903 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 6584671 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |