JP7472059B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
- Publication number
- JP7472059B2 JP7472059B2 JP2021029016A JP2021029016A JP7472059B2 JP 7472059 B2 JP7472059 B2 JP 7472059B2 JP 2021029016 A JP2021029016 A JP 2021029016A JP 2021029016 A JP2021029016 A JP 2021029016A JP 7472059 B2 JP7472059 B2 JP 7472059B2
- Authority
- JP
- Japan
- Prior art keywords
- region
- silicon carbide
- electrode
- mosfet
- carbide region
- 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.)
- Active
Links
- 239000004065 semiconductor Substances 0.000 title claims description 37
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 154
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 150
- 239000012535 impurity Substances 0.000 claims description 47
- 210000000746 body region Anatomy 0.000 description 77
- 239000010410 layer Substances 0.000 description 66
- 229910021332 silicide Inorganic materials 0.000 description 12
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 230000006798 recombination Effects 0.000 description 3
- 238000005215 recombination Methods 0.000 description 3
- 238000004645 scanning capacitance microscopy Methods 0.000 description 3
- 238000005011 time of flight secondary ion mass spectroscopy Methods 0.000 description 3
- 238000002042 time-of-flight secondary ion mass spectrometry Methods 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RUFLMLWJRZAWLJ-UHFFFAOYSA-N nickel silicide Chemical compound [Ni]=[Si]=[Ni] RUFLMLWJRZAWLJ-UHFFFAOYSA-N 0.000 description 2
- 229910021334 nickel silicide Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-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
- 238000000089 atomic force micrograph Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005669 field effect Effects 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
- 238000002513 implantation Methods 0.000 description 1
- 238000005468 ion implantation Methods 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
- 230000000704 physical effect Effects 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910021341 titanium silicide Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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 adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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
- H01L29/7803—Vertical DMOS transistors, i.e. VDMOS transistors structurally associated with at least one other device
- H01L29/7806—Vertical DMOS transistors, i.e. VDMOS transistors structurally associated with at least one other device the other device being a Schottky barrier diode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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]
- H01L29/063—Reduced surface field [RESURF] pn-junction structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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 adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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
- H01L29/0642—Isolation within the component, i.e. internal isolation
- H01L29/0649—Dielectric regions, e.g. SiO2 regions, air gaps
- H01L29/0653—Dielectric regions, e.g. SiO2 regions, air gaps adjoining the input or output region of a field-effect device, e.g. the source or drain region
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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 adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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 adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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 System
- H01L29/1608—Silicon carbide
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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
- H01L29/417—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions carrying the current to be rectified, amplified or switched
- H01L29/41725—Source or drain electrodes for field effect devices
- H01L29/41766—Source or drain electrodes for field effect devices with at least part of the source or drain electrode having contact below the semiconductor surface, e.g. the source or drain electrode formed at least partially in a groove or with inclusions of conductor inside the semiconductor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/45—Ohmic electrodes
Description
第1の実施形態の半導体装置は、第1の電極と、第2の電極と、第1の方向に延びるゲート電極と、第1の電極と第2の電極との間に設けられ、第1の電極の側の第1の方向に平行な第1の面と、第2の電極の側の第2の面とを有する炭化珪素層であって、第1の面に接しゲート電極と対向し第1の方向に延びる第1の領域と、第1の面に接し第1の電極と接する第2の領域と、を有する第1導電型の第1の炭化珪素領域と、第1の炭化珪素領域と第1の面との間に設けられ、少なくとも一部が第1の領域と第2の領域との間に挟まれ、ゲート電極に対向し、第1の電極に電気的に接続された第2導電型の第2の炭化珪素領域と、第1の炭化珪素領域と第1の面との間に設けられ、第2の炭化珪素領域との間に第1の領域を挟み、ゲート電極に対向し、第1の電極に電気的に接続された第2導電型の第3の炭化珪素領域と、第2の炭化珪素領域と第1の面との間に設けられ、第1の電極と電気的に接続された第1導電型の第4の炭化珪素領域と、を含む炭化珪素層と、ゲート電極と第2の炭化珪素領域との間、ゲート電極と第3の炭化珪素領域との間、及び、ゲート電極と第1の領域との間に設けられたゲート絶縁層と、を備え、第1の方向に垂直な第2の方向における、第1の領域の第1の幅は0.5μm以上1.2μm以下であり、第2の領域の第2の方向の第2の幅は0.5μm以上1.5μm以下であり、第1の面において、第1の領域の第2の方向の第1の中点を通り第1の方向に延びる第1の中心線の上で、第4の炭化珪素領域と第1の電極とが接する部分に対し第2の方向に位置する第1の線分と、第1の面において、第2の領域の第2の方向の第2の中点を通り第1の方向に延びる第2の中心線の上で、第2の領域と重なる第2の線分との間の最短距離は、第1の幅の3倍以上である。
第2の実施形態の半導体装置は、第2の領域は、第5の炭化珪素領域の第1の方向に位置する点で、第1の実施形態と異なる。以下、第1の実施形態と重複する内容については一部記述を省略する場合がある。
12 ソース電極(第1の電極)
14 ドレイン電極(第2の電極)
16 ゲート絶縁層
18 ゲート電極
24 ドリフト領域(第1の炭化珪素領域)
24a JFET領域(第1の領域)
24b JBS領域(第2の領域)
26a 第1のボディ領域(第2の炭化珪素領域)
26b 第2のボディ領域(第3の炭化珪素領域)
26c 第3のボディ領域(第6の炭化珪素領域)
28 ソース領域(第4の炭化珪素領域)
32 ボディコンタクト領域(第5の炭化珪素領域)
100 MOSFET(半導体装置)
200 MOSFET(半導体装置)
I1 第1の界面
I2 第2の界面
LS1 第1の線分
LS2 第2の線分
ML1 第1の中心線
ML2 第2の中心線
MP1 第1の中点
MP2 第2の中点
P1 第1の面
P2 第2の面
d1 差
d2 距離
dmin 最短距離
w1 第1の幅
w2 第2の幅
Claims (7)
- 第1の電極と、
第2の電極と、
第1の方向に延びるゲート電極と、
前記第1の電極と前記第2の電極との間に設けられ、前記第1の電極の側の前記第1の方向に平行な第1の面と、前記第2の電極の側の第2の面とを有する炭化珪素層であって、
前記第1の面に接し前記ゲート電極と対向し前記第1の方向に延びる第1の領域と、前記第1の面に接し前記第1の電極と接する第2の領域と、を有する第1導電型の第1の炭化珪素領域と、
前記第1の炭化珪素領域と前記第1の面との間に設けられ、少なくとも一部が前記第1の領域と前記第2の領域との間に挟まれ、前記ゲート電極に対向し、前記第1の電極に電気的に接続された第2導電型の第2の炭化珪素領域と、
前記第1の炭化珪素領域と前記第1の面との間に設けられ、前記第2の炭化珪素領域との間に前記第1の領域を挟み、前記ゲート電極に対向し、前記第1の電極に電気的に接続された第2導電型の第3の炭化珪素領域と、
前記第2の炭化珪素領域と前記第1の面との間に設けられ、前記第1の電極と電気的に接続された第1導電型の第4の炭化珪素領域と、
を含む炭化珪素層と、
前記ゲート電極と前記第2の炭化珪素領域との間、前記ゲート電極と前記第3の炭化珪素領域との間、及び、前記ゲート電極と前記第1の領域との間に設けられたゲート絶縁層と、
を備え、
前記第1の方向に垂直な第2の方向における、前記第1の領域の第1の幅は0.5μm以上1.2μm以下であり、
前記第2の領域の前記第2の方向の第2の幅は0.5μm以上1.5μm以下であり、
前記第1の面において、前記第1の領域の前記第2の方向の第1の中点を通り前記第1の方向に延びる第1の中心線の上で、前記第4の炭化珪素領域と前記第1の電極とが接する部分に対し前記第2の方向に位置する第1の線分と、
前記第1の面において、前記第2の領域の前記第2の方向の第2の中点を通り前記第1の方向に延びる第2の中心線の上で、前記第2の領域と重なる第2の線分との間の最短距離は、前記第1の幅の3倍以上であり、
前記炭化珪素層は、前記第1の電極と前記第2の炭化珪素領域との間に、前記第2の炭化珪素領域よりも第2導電型不純物濃度の高い第5の炭化珪素領域を、更に含み、
前記第1の電極と前記第5の炭化珪素領域との第1の界面は、前記第1の電極と前記第2の領域との第2の界面より深い、半導体装置。 - 前記第1の面において、所定の領域に占める前記第1の領域の割合は20%以下であり、
前記第1の面において、前記所定の領域に占める前記第2の領域の割合は10%以下である請求項1記載の半導体装置。 - 前記炭化珪素層は、前記第1の炭化珪素領域と前記第1の面との間に設けられ、前記第2の炭化珪素領域との間に前記第2の領域を挟み、前記ゲート電極に対向し、前記第1の電極に電気的に接続された第2導電型の第6の炭化珪素領域を、更に含む請求項1又は請求項2記載の半導体装置。
- 前記第2の領域は、前記第5の炭化珪素領域の前記第1の方向に位置する請求項1ないし請求項3いずれか一項記載の半導体装置。
- 前記第1の界面と前記第2の界面との深さの差は0.1μm以上である請求項1ないし請求項4いずれか一項記載の半導体装置。
- 前記第1の界面と前記第2の領域との間の距離は、0.5μm以上2.0μm以下である請求項1ないし請求項5いずれか一項記載の半導体装置。
- 第1の電極と、
第2の電極と、
第1の方向に延びるゲート電極と、
前記第1の電極と前記第2の電極との間に設けられ、前記第1の電極の側の前記第1の方向に平行な第1の面と、前記第2の電極の側の第2の面とを有する炭化珪素層であって、
前記第1の面に接し前記ゲート電極と対向し前記第1の方向に延びる第1の領域と、前記第1の面に接し前記第1の電極と接する第2の領域と、を有する第1導電型の第1の炭化珪素領域と、
前記第1の炭化珪素領域と前記第1の面との間に設けられ、少なくとも一部が前記第1の領域と前記第2の領域との間に挟まれ、前記ゲート電極に対向し、前記第1の電極に電気的に接続された第2導電型の第2の炭化珪素領域と、
前記第1の炭化珪素領域と前記第1の面との間に設けられ、前記第2の炭化珪素領域との間に前記第1の領域を挟み、前記ゲート電極に対向し、前記第1の電極に電気的に接続された第2導電型の第3の炭化珪素領域と、
前記第2の炭化珪素領域と前記第1の面との間に設けられ、前記第1の電極と電気的に接続された第1導電型の第4の炭化珪素領域と、
を含む炭化珪素層と、
前記ゲート電極と前記第2の炭化珪素領域との間、前記ゲート電極と前記第3の炭化珪素領域との間、及び、前記ゲート電極と前記第1の領域との間に設けられたゲート絶縁層と、
を備え、
前記第1の方向に垂直な第2の方向における、前記第1の領域の第1の幅は0.5μm以上1.2μm以下であり、
前記第2の領域の前記第2の方向の第2の幅は0.5μm以上1.5μm以下であり、
前記第1の面において、前記第1の領域の前記第2の方向の第1の中点を通り前記第1の方向に延びる第1の中心線の上で、前記第4の炭化珪素領域と前記第1の電極とが接する部分に対し前記第2の方向に位置する第1の線分と、
前記第1の面において、前記第2の領域の前記第2の方向の第2の中点を通り前記第1の方向に延びる第2の中心線の上で、前記第2の領域と重なる第2の線分との間の最短距離は、前記第1の幅の3倍以上であり、
前記炭化珪素層は、前記第1の電極と前記第2の炭化珪素領域との間に、前記第2の炭化珪素領域よりも第2導電型不純物濃度の高い第5の炭化珪素領域を、更に含み、
前記第1の電極と前記第5の炭化珪素領域との第1の界面は、前記第4の炭化珪素領域と前記第5の炭化珪素領域との第3の界面より深い、半導体装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021029016A JP7472059B2 (ja) | 2021-02-25 | 2021-02-25 | 半導体装置 |
CN202110676493.0A CN114975626A (zh) | 2021-02-25 | 2021-06-18 | 半导体装置 |
US17/471,093 US11955543B2 (en) | 2021-02-25 | 2021-09-09 | Semiconductor device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021029016A JP7472059B2 (ja) | 2021-02-25 | 2021-02-25 | 半導体装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2022130063A JP2022130063A (ja) | 2022-09-06 |
JP7472059B2 true JP7472059B2 (ja) | 2024-04-22 |
Family
ID=82899842
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2021029016A Active JP7472059B2 (ja) | 2021-02-25 | 2021-02-25 | 半導体装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US11955543B2 (ja) |
JP (1) | JP7472059B2 (ja) |
CN (1) | CN114975626A (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009246225A (ja) | 2008-03-31 | 2009-10-22 | Rohm Co Ltd | 半導体装置 |
JP2017216297A (ja) | 2016-05-30 | 2017-12-07 | 株式会社東芝 | 半導体装置 |
JP2018107168A (ja) | 2016-12-22 | 2018-07-05 | 富士電機株式会社 | 半導体装置および半導体装置の製造方法 |
WO2018139556A1 (ja) | 2017-01-25 | 2018-08-02 | ローム株式会社 | 半導体装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5992094B2 (ja) | 2013-04-03 | 2016-09-14 | 三菱電機株式会社 | 半導体装置 |
CN106688103B (zh) * | 2014-10-01 | 2019-09-20 | 三菱电机株式会社 | 半导体装置 |
JP6602263B2 (ja) * | 2016-05-30 | 2019-11-06 | 株式会社東芝 | 半導体装置、半導体装置の製造方法、インバータ回路、駆動装置、車両、及び、昇降機 |
JP6666224B2 (ja) | 2016-09-21 | 2020-03-13 | 株式会社東芝 | 半導体装置 |
US11380764B2 (en) * | 2016-12-14 | 2022-07-05 | Hitachi, Ltd. | Semiconductor device, method of manufacturing same, and sensor |
US10424660B2 (en) * | 2017-12-21 | 2019-09-24 | Cree, Inc. | Power silicon carbide based MOSFET transistors with improved short circuit capabilities and methods of making such devices |
JP7003019B2 (ja) | 2018-09-15 | 2022-01-20 | 株式会社東芝 | 半導体装置 |
JP7214508B2 (ja) | 2019-03-01 | 2023-01-30 | 株式会社東芝 | 半導体装置 |
-
2021
- 2021-02-25 JP JP2021029016A patent/JP7472059B2/ja active Active
- 2021-06-18 CN CN202110676493.0A patent/CN114975626A/zh active Pending
- 2021-09-09 US US17/471,093 patent/US11955543B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009246225A (ja) | 2008-03-31 | 2009-10-22 | Rohm Co Ltd | 半導体装置 |
JP2017216297A (ja) | 2016-05-30 | 2017-12-07 | 株式会社東芝 | 半導体装置 |
JP2018107168A (ja) | 2016-12-22 | 2018-07-05 | 富士電機株式会社 | 半導体装置および半導体装置の製造方法 |
WO2018139556A1 (ja) | 2017-01-25 | 2018-08-02 | ローム株式会社 | 半導体装置 |
Also Published As
Publication number | Publication date |
---|---|
CN114975626A (zh) | 2022-08-30 |
US20220271155A1 (en) | 2022-08-25 |
US11955543B2 (en) | 2024-04-09 |
JP2022130063A (ja) | 2022-09-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6666224B2 (ja) | 半導体装置 | |
US10177251B2 (en) | Semiconductor device, inverter circuit, drive device, vehicle, and elevator | |
JP6649183B2 (ja) | 半導体装置 | |
JP7214508B2 (ja) | 半導体装置 | |
US10872974B2 (en) | Semiconductor device | |
US20230017518A1 (en) | Semiconductor device | |
JP7196265B2 (ja) | 半導体装置 | |
JP7472059B2 (ja) | 半導体装置 | |
JPWO2019077877A1 (ja) | 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 | |
US20230307502A1 (en) | Semiconductor device | |
US20230088612A1 (en) | Semiconductor device | |
US20230092735A1 (en) | Semiconductor device | |
US20230092171A1 (en) | Semiconductor device | |
US20230090271A1 (en) | Semiconductor device | |
EP4156301A1 (en) | Semiconductor device | |
US11769800B2 (en) | Semiconductor device | |
JP2020074426A (ja) | 半導体装置 | |
JP2023142243A (ja) | 半導体装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20230202 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20231130 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20240109 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20240226 |
|
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: 20240312 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20240410 |