JP7242489B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP7242489B2 JP7242489B2 JP2019169779A JP2019169779A JP7242489B2 JP 7242489 B2 JP7242489 B2 JP 7242489B2 JP 2019169779 A JP2019169779 A JP 2019169779A JP 2019169779 A JP2019169779 A JP 2019169779A JP 7242489 B2 JP7242489 B2 JP 7242489B2
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- 239000004065 semiconductor Substances 0.000 title claims description 142
- 150000004767 nitrides Chemical class 0.000 claims description 85
- 239000013078 crystal Substances 0.000 claims description 51
- 238000005452 bending Methods 0.000 claims description 30
- 239000010410 layer Substances 0.000 description 199
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 7
- 239000012535 impurity Substances 0.000 description 7
- 239000011229 interlayer Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000002003 electron diffraction Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
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- 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
- H01L29/7813—Vertical DMOS transistors, i.e. VDMOS transistors with trench gate electrode, e.g. UMOS transistors
-
- 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
- H01L29/04—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their crystalline structure, e.g. polycrystalline, cubic or particular orientation of crystalline planes
- H01L29/045—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their crystalline structure, e.g. polycrystalline, cubic or particular orientation of crystalline planes by their particular orientation of crystalline planes
-
- 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
- H01L29/20—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only AIIIBV compounds
- H01L29/2003—Nitride compounds
-
- 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
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42356—Disposition, e.g. buried gate electrode
- H01L29/4236—Disposition, e.g. buried gate electrode within a trench, e.g. trench gate electrode, groove gate electrode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices 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
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42372—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the conducting layer, e.g. the length, the sectional shape or the lay-out
- H01L29/42376—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the conducting layer, e.g. the length, the sectional shape or the lay-out characterised by the length or the sectional shape
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- 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
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42372—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the conducting layer, e.g. the length, the sectional shape or the lay-out
- H01L29/4238—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the conducting layer, e.g. the length, the sectional shape or the lay-out characterised by the surface lay-out
Description
GaNは横型HEMTデバイスが主流であるが、SiやSiCと同様に縦型MOS-FET構造が注目されている。
第1実施形態は、半導体装置に関する。図1に実施形態の半導体装置100の断面図を示す。図1の半導体装置100の断面図は、半導体装置100の一部を表している。
また、六角形状のゲート電極を形成した場合、各ゲート電極及びソース電極を接続する上部配線層を設けるが、ジグザグな構成を採用することで、このような層状の配線が不要となり、ゲート電極5とソース電極7に低抵抗な配線を用いることでの配線抵抗を下げることもできる。
第2実施形態は、半導体装置に関する。図5に及び図6第2実施形態の半導体装置101、102の断面図を示す。図5の断面図は、図1の断面図に対応する図面である。第2実施形態の半導体装置101、102は、トレンチT2の底に向かって先細りになっていること以外は、第1実施形態の半導体装置100と同様である。
第3実施形態は、半導体装置に関する。図7に第3実施形態の半導体装置103の断面図を示す。図7の断面図は、図3の断面図に対応する図面である。第3実施形態の半導体装置103は、チャネル層3及びゲート電極5の折れ曲っている部分は曲面を含むこと以外は、第1実施形態の半導体装置100と同様である。なお、第3実施形態において、第2実施形態のようにトレンチT2の底に向かって先細りになっている構造を採用することができる。
Claims (10)
- 第1導電型の第1窒化物半導体層と、
第1導電型で、前記第1窒化物半導体層上に設けられた第2窒化物半導体層と、
第2導電型で、前記第2窒化物半導体層上に設けられた第3窒化物半導体層と、
第1導電型で、前記第3窒化物半導体層上に設けられた第4窒化物半導体層と、
前記第2窒化物半導体層、前記第3窒化物半導体層及び前記第4窒化物半導体層に設けられたトレンチ内に第1絶縁膜を介して設けられた第1電極と、を備え、
前記第3窒化物半導体層及び前記第1電極は、前記第1窒化物半導体層と前記第2窒化物半導体層の積層方向に対して垂直方向に延在し、2回以上の折れ曲がりを少なくとも含み、逆方向に折れ曲がっていて、
前記第3窒化物半導体層の前記第1絶縁膜と対向する主たる結晶面は、1つの等価な結晶面で構成される半導体装置。 - 第1導電型の第1窒化物半導体層と、
第1導電型で、前記第1窒化物半導体層上に設けられた第2窒化物半導体層と、
第2導電型で、前記第2窒化物半導体層上に設けられた第3窒化物半導体層と、
第1導電型で、前記第3窒化物半導体層上に設けられた第4窒化物半導体層と、
前記第2窒化物半導体層、前記第3窒化物半導体層及び前記第4窒化物半導体層に設けられたトレンチ内に第1絶縁膜を介して設けられた第1電極と、を備え、
前記第3窒化物半導体層及び前記第1電極は、前記第1窒化物半導体層と前記第2窒化物半導体層の積層方向に対して垂直方向に延在し、2回以上の折れ曲がりを少なくとも含み、逆方向に折れ曲がっていて、
前記第3窒化物半導体層のチャネル幅方向の長さは10μm以上である半導体装置。 - 前記第3窒化物半導体層は、前記第1電極を挟むように複数設けられ、
前記第3窒化物半導体層及び前記第1電極は、前記第1窒化物半導体層と前記第2窒化物半導体層の積層方向に対して垂直方向に延在し、同一方向にストライプ状に延在している請求項1又は2に記載の半導体装置。 - 前記トレンチは、底に向かって先細りになっている請求項1ないし3のいずれか1項に記載の半導体装置。
- 前記第3窒化物半導体層及び前記第1電極の前記折れ曲っている部分は曲面を含む請求項1ないし4のいずれか1項に記載の半導体装置。
- 前記第3窒化物半導体層及び前記第1電極の折れ曲がり間隔は、規則的であり、
前記第3窒化物半導体層及び前記第1電極の折れ曲がり角度は、規則的である請求項1ないし5のいずれか1項に記載の半導体装置。 - 前記第3窒化物半導体層のチャネル幅方向の長さは10μm以上である請求項1に記載の半導体装置。
- 前記第3窒化物半導体層及び前記第1電極の折れ曲がり角度は、120±5°又は-120±5°である請求項1ないし7のいずれか1項に記載の半導体装置。
- 前記第4窒化物半導体層上に設けられた第2電極をさらに備え、
前記第4窒化物半導体層、前記第1絶縁膜、及び前記第2電極は、前記第3窒化物半導体層及び前記第1電極の延在する方向と同じ方向に、規則的で、2回以上の折れ曲がりを少なくとも含み、逆方向に折れ曲って延在している請求項1ないし8のいずれか1項に記載の半導体装置。 - 前記第3窒化物半導体層及び前記第1電極の一部は、前記延在する方向に分断されている請求項1ないし9のいずれか1項に記載の半導体装置。
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Citations (6)
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JP2006237066A (ja) | 2005-02-22 | 2006-09-07 | Toshiba Corp | 半導体装置 |
JP2009088198A (ja) | 2007-09-28 | 2009-04-23 | Rohm Co Ltd | 半導体装置 |
WO2014174911A1 (ja) | 2013-04-23 | 2014-10-30 | 三菱電機株式会社 | 半導体装置 |
WO2017064887A1 (ja) | 2015-10-16 | 2017-04-20 | 三菱電機株式会社 | 半導体装置 |
JP2018101669A (ja) | 2016-12-19 | 2018-06-28 | トヨタ自動車株式会社 | スイッチング素子の製造方法 |
JP2019062160A (ja) | 2017-09-28 | 2019-04-18 | 豊田合成株式会社 | 半導体装置 |
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JP2001102576A (ja) | 1999-09-29 | 2001-04-13 | Sanyo Electric Co Ltd | 半導体装置 |
JP5667926B2 (ja) | 2011-05-12 | 2015-02-12 | 新電元工業株式会社 | 半導体素子 |
JP6136571B2 (ja) * | 2013-05-24 | 2017-05-31 | 富士通株式会社 | 半導体装置及び半導体装置の製造方法 |
JP2017050320A (ja) | 2015-08-31 | 2017-03-09 | 住友電気工業株式会社 | 縦型トランジスタおよびその製造方法 |
US10770599B2 (en) * | 2016-09-03 | 2020-09-08 | Champion Microelectronic Corp. | Deep trench MOS barrier junction all around rectifier and MOSFET |
JP7259215B2 (ja) * | 2018-06-01 | 2023-04-18 | 富士電機株式会社 | 絶縁ゲート型半導体装置及び絶縁ゲート型半導体装置の製造方法 |
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JP2006237066A (ja) | 2005-02-22 | 2006-09-07 | Toshiba Corp | 半導体装置 |
JP2009088198A (ja) | 2007-09-28 | 2009-04-23 | Rohm Co Ltd | 半導体装置 |
WO2014174911A1 (ja) | 2013-04-23 | 2014-10-30 | 三菱電機株式会社 | 半導体装置 |
WO2017064887A1 (ja) | 2015-10-16 | 2017-04-20 | 三菱電機株式会社 | 半導体装置 |
JP2018101669A (ja) | 2016-12-19 | 2018-06-28 | トヨタ自動車株式会社 | スイッチング素子の製造方法 |
JP2019062160A (ja) | 2017-09-28 | 2019-04-18 | 豊田合成株式会社 | 半導体装置 |
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