JP6783992B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP6783992B2 JP6783992B2 JP2017189645A JP2017189645A JP6783992B2 JP 6783992 B2 JP6783992 B2 JP 6783992B2 JP 2017189645 A JP2017189645 A JP 2017189645A JP 2017189645 A JP2017189645 A JP 2017189645A JP 6783992 B2 JP6783992 B2 JP 6783992B2
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- 239000004065 semiconductor Substances 0.000 title claims description 218
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 155
- 229910052757 nitrogen Inorganic materials 0.000 claims description 78
- 238000000034 method Methods 0.000 claims description 40
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 39
- 150000004767 nitrides Chemical class 0.000 claims description 39
- 239000013078 crystal Substances 0.000 claims description 33
- 238000005546 reactive sputtering Methods 0.000 claims description 24
- 238000004519 manufacturing process Methods 0.000 claims description 23
- 238000012545 processing Methods 0.000 claims description 19
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 5
- 239000000758 substrate Substances 0.000 description 16
- 238000005259 measurement Methods 0.000 description 15
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 10
- 229910052581 Si3N4 Inorganic materials 0.000 description 8
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 8
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 6
- 229910052733 gallium Inorganic materials 0.000 description 6
- 229910002601 GaN Inorganic materials 0.000 description 5
- 238000000231 atomic layer deposition Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 229910052738 indium Inorganic materials 0.000 description 3
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 3
- 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
- RNQKDQAVIXDKAG-UHFFFAOYSA-N aluminum gallium Chemical compound [Al].[Ga] RNQKDQAVIXDKAG-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- -1 titanium nitrides Chemical class 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- AJNVQOSZGJRYEI-UHFFFAOYSA-N digallium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Ga+3] AJNVQOSZGJRYEI-UHFFFAOYSA-N 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 229910001195 gallium oxide Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000001552 radio frequency sputter deposition Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28264—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being a III-V compound
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/02227—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process
- H01L21/0223—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate
- H01L21/02233—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer
- H01L21/02241—III-V semiconductor
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
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- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
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- 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
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- 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
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
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- 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
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/49—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET
- H01L29/4966—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET the conductor material next to the insulator being a composite material, e.g. organic material, TiN, MoSi2
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- H01L29/78—Field effect transistors with field effect produced by an insulated gate
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- 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
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
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- H01L29/49—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET
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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- Electrodes Of Semiconductors (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
Description
図1は、半導体装置100の構成を模式的に示す断面図である。図1には、相互に直交するX軸、Y軸およびZ軸が図示されている。X軸は、図1の左から右に延びる軸である。Y軸は、図1の紙面の手前から奥に延びる軸である。Z軸は、図1の下から上に延びる軸である。なお、本明細書において、+Z軸方向側を便宜的に「上」と呼ぶことがある。この「上」という呼称は、半導体装置100の配置(向き)を限定するものではない。すなわち、半導体装置100は、任意の向きに配置しうる。
第2実施形態における半導体装置は、ゲート電極170とは異なるゲート電極を備える点を除き、第1実施形態における半導体装置100と同じ構成である。第2実施形態ゲート電極は、結晶配向に(200)配向および(220)を含む窒化タンタルから形成されている。
図15は、第3実施形態における半導体装置200の構成を模式的に示す断面図である。半導体装置200は、いわゆる縦型MOSFETである。半導体装置200は、基板210と、n型半導体層220と、p型半導体層230と、n型半導体層240と、ソース電極252と、ドレイン電極254と、ゲート絶縁膜260と、ゲート電極270とを備える。
上述した各実施形態では、ゲート電極の結晶配向は、処理チャンバ内の窒素分圧を高くすることによって(200)配向が形成されるよう調整されていたが、本発明はこれに限られない。例えば、ゲート電極の結晶配向は、RFスパッタ法において高周波電力を印加する、もしくは、基板バイアス印加を行うことで調整されてもよい。また、ゲート電極の結晶配向は、処理チャンバに流すガスに含まれる窒素量の割合を増加させることによって(200)配向が形成されるよう調整されてもよい。
100a…半導体装置
110…基板
120…i型半導体層
130…p型半導体層
135…改質層
142…n型半導体領域
144…n型半導体領域
152…ソース電極
154…ドレイン電極
160…ゲート絶縁膜
170…ゲート電極
200…半導体装置
210…基板
220…n型半導体層
230…p型半導体層
240…n型半導体層
252…ソース電極
254…ドレイン電極
260…ゲート絶縁膜
265…トレンチ
270…ゲート電極
Claims (6)
- 半導体装置であって、
窒化物半導体層と、
前記窒化物半導体層に接して形成された酸化物絶縁膜と、
前記酸化物絶縁膜に接して形成され、結晶配向に(200)配向と(220)配向とのうち少なくとも一方を含む窒化金属から形成されるゲート電極と、を備える、半導体装置。 - 請求項1に記載の半導体装置であって、
前記ゲート電極は、窒化チタンもしくは窒化タンタルから形成される、半導体装置。 - 請求項1または請求項2に記載の半導体装置であって、
前記酸化物絶縁膜は、酸化シリコンから形成される、半導体装置。 - 請求項1から請求項3までのいずれか一項に記載の半導体装置であって前記ゲート電極が窒化チタンから形成される前記半導体装置を製造する製造方法であって、
前記ゲート電極は、処理チャンバ内の窒素分圧が0.270Pa以上である条件下において反応性スパッタ法によって形成される、半導体装置を製造する製造方法。 - 請求項1から請求項3までのいずれか一項に記載の半導体装置であって前記ゲート電極が窒化タンタルから形成される前記半導体装置を製造する製造方法であって、
前記ゲート電極は、処理チャンバ内の窒素分圧が0.252Pa以上である条件下において反応性スパッタ法によって形成される、半導体装置を製造する製造方法。 - 請求項4または請求項5に記載の前記半導体装置を製造する製造方法であって、
前記ゲート電極は、前記反応性スパッタ法で形成された後、加熱処理が施される、製造方法。
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JP3540613B2 (ja) * | 1998-07-24 | 2004-07-07 | 株式会社東芝 | 半導体装置 |
JP5468301B2 (ja) * | 2009-05-18 | 2014-04-09 | シャープ株式会社 | 窒化物半導体装置および窒化物半導体装置製造方法 |
JP2012104735A (ja) | 2010-11-12 | 2012-05-31 | Panasonic Corp | 半導体装置及びその製造方法 |
JP2015032744A (ja) * | 2013-08-05 | 2015-02-16 | 株式会社東芝 | 半導体装置および半導体装置の製造方法 |
JP2015056486A (ja) * | 2013-09-11 | 2015-03-23 | 株式会社東芝 | 半導体装置およびその製造方法 |
JP2016054250A (ja) * | 2014-09-04 | 2016-04-14 | 豊田合成株式会社 | 半導体装置、製造方法、方法 |
JP6656692B2 (ja) * | 2015-10-16 | 2020-03-04 | 富士電機株式会社 | 半導体装置の評価方法および半導体装置の評価装置 |
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US10229833B2 (en) * | 2016-11-01 | 2019-03-12 | Asm Ip Holding B.V. | Methods for forming a transition metal nitride film on a substrate by atomic layer deposition and related semiconductor device structures |
US10032673B1 (en) * | 2017-05-30 | 2018-07-24 | Vanguard International Semiconductor Corporation | Semiconductor devices and methods for manufacturing the same |
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