JP7205929B2 - 低容量相互接続用のエアギャップを備えた半導体デバイスを形成する方法 - Google Patents
低容量相互接続用のエアギャップを備えた半導体デバイスを形成する方法 Download PDFInfo
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- JP7205929B2 JP7205929B2 JP2020555174A JP2020555174A JP7205929B2 JP 7205929 B2 JP7205929 B2 JP 7205929B2 JP 2020555174 A JP2020555174 A JP 2020555174A JP 2020555174 A JP2020555174 A JP 2020555174A JP 7205929 B2 JP7205929 B2 JP 7205929B2
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- silanol
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- 238000000034 method Methods 0.000 title claims description 45
- 239000004065 semiconductor Substances 0.000 title description 7
- 239000002243 precursor Substances 0.000 claims description 110
- 239000000758 substrate Substances 0.000 claims description 76
- 239000000463 material Substances 0.000 claims description 41
- 239000010936 titanium Substances 0.000 claims description 40
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 claims description 10
- 229910052719 titanium Inorganic materials 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 229910052736 halogen Inorganic materials 0.000 claims description 8
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052681 coesite Inorganic materials 0.000 claims description 7
- 229910052906 cristobalite Inorganic materials 0.000 claims description 7
- 150000002367 halogens Chemical class 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 235000012239 silicon dioxide Nutrition 0.000 claims description 7
- 229910052682 stishovite Inorganic materials 0.000 claims description 7
- 229910052905 tridymite Inorganic materials 0.000 claims description 7
- ORJFXWYTRPGGRK-UHFFFAOYSA-N hydroxy-tris(2-methylbutan-2-yloxy)silane Chemical compound CCC(C)(C)O[Si](O)(OC(C)(C)CC)OC(C)(C)CC ORJFXWYTRPGGRK-UHFFFAOYSA-N 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910017083 AlN Inorganic materials 0.000 claims description 3
- 229910017109 AlON Inorganic materials 0.000 claims description 3
- 229910018565 CuAl Inorganic materials 0.000 claims description 3
- 229910004491 TaAlN Inorganic materials 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 229910010041 TiAlC Inorganic materials 0.000 claims description 3
- 229910010037 TiAlN Inorganic materials 0.000 claims description 3
- 229910010282 TiON Inorganic materials 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 230000003301 hydrolyzing effect Effects 0.000 claims description 3
- MBMITMZVBNZJTQ-UHFFFAOYSA-N hydroxy-bis[(2-methylpropan-2-yl)oxy]-propan-2-yloxysilane Chemical compound CC(C)O[Si](O)(OC(C)(C)C)OC(C)(C)C MBMITMZVBNZJTQ-UHFFFAOYSA-N 0.000 claims description 3
- HLDBBQREZCVBMA-UHFFFAOYSA-N hydroxy-tris[(2-methylpropan-2-yl)oxy]silane Chemical compound CC(C)(C)O[Si](O)(OC(C)(C)C)OC(C)(C)C HLDBBQREZCVBMA-UHFFFAOYSA-N 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- 229910015844 BCl3 Inorganic materials 0.000 claims description 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 claims description 2
- 229910003074 TiCl4 Inorganic materials 0.000 claims description 2
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims description 2
- FAQYAMRNWDIXMY-UHFFFAOYSA-N trichloroborane Chemical compound ClB(Cl)Cl FAQYAMRNWDIXMY-UHFFFAOYSA-N 0.000 claims description 2
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 claims description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims 4
- 238000003672 processing method Methods 0.000 claims 2
- 239000007789 gas Substances 0.000 description 42
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000000151 deposition Methods 0.000 description 5
- 239000003989 dielectric material Substances 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000003446 ligand Substances 0.000 description 4
- 238000001878 scanning electron micrograph Methods 0.000 description 4
- -1 aryloxides Chemical class 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 238000000231 atomic layer deposition Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910004541 SiN Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 229910011208 Ti—N Inorganic materials 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- PQLAYKMGZDUDLQ-UHFFFAOYSA-K aluminium bromide Chemical compound Br[Al](Br)Br PQLAYKMGZDUDLQ-UHFFFAOYSA-K 0.000 description 1
- CECABOMBVQNBEC-UHFFFAOYSA-K aluminium iodide Chemical compound I[Al](I)I CECABOMBVQNBEC-UHFFFAOYSA-K 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 150000003983 crown ethers Chemical class 0.000 description 1
- 125000000058 cyclopentadienyl group Chemical group C1(=CC=CC1)* 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 150000002240 furans Chemical class 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 125000001181 organosilyl group Chemical group [SiH3]* 0.000 description 1
- 150000003222 pyridines Chemical class 0.000 description 1
- 150000003233 pyrroles Chemical class 0.000 description 1
- 150000003235 pyrrolidines Chemical class 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- MNWRORMXBIWXCI-UHFFFAOYSA-N tetrakis(dimethylamido)titanium Chemical compound CN(C)[Ti](N(C)C)(N(C)C)N(C)C MNWRORMXBIWXCI-UHFFFAOYSA-N 0.000 description 1
- VOITXYVAKOUIBA-UHFFFAOYSA-N triethylaluminium Chemical compound CC[Al](CC)CC VOITXYVAKOUIBA-UHFFFAOYSA-N 0.000 description 1
- 229910006400 μ-Cl Inorganic materials 0.000 description 1
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- 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
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76838—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
- H01L21/76877—Filling of holes, grooves or trenches, e.g. vias, with conductive material
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- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/7682—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing the dielectric comprising air gaps
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- 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
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/285—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
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- H01L21/28512—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table
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- 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
- H01L21/324—Thermal treatment for modifying the properties of semiconductor bodies, e.g. annealing, sintering
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- 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
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
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- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
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Description
本出願は、2018年4月9日に出願された米国仮特許出願第62/654,760号に関連し、その優先権を主張するものであり、その内容全体が参照により本明細書に援用される。
Claims (20)
- 基板処理方法であって、
隆起フィーチャを含有する基板に、頂部領域及び側壁、並びに前記隆起フィーチャ間の底部領域を提供するステップと、
前記基板をガスパルスシーケンスに曝露して、前記隆起フィーチャ間にエアギャップを形成する材料を堆積させるステップと、
を含み、
前記ガスパルスシーケンスは、任意の順序で、
a)連続して、第1に、前記基板を第1の前駆体ガスに曝露して、前記側壁の下部及び前記底部領域ではなく、前記頂部領域及び前記側壁の上部に、第1の前駆体層を非コンフォーマルに形成し、第2に、前記基板を前記第1の前駆体層と反応する第2の前駆体ガスに曝露して、前記基板上に前記材料の第1の層を形成するステップと、
b)連続して、第1に、前記基板を前記第1の前駆体ガスに曝露して、前記頂部領域、前記側壁、及び前記底部領域に、第2の前駆体層をコンフォーマルに形成し、第2に、前記基板を前記第2の前駆体層と反応する前記第2の前駆体ガスに曝露して、前記基板上に前記材料の第2の層を形成するステップと、
を含む、方法。 - 前記エアギャップが形成されるまで、ステップa)、b)、又はa)及びb)を少なくとも1回繰り返すステップを更に含む、請求項1に記載の方法。
- 前記第1の前駆体ガスは、金属含有前駆体を含有する、請求項1に記載の方法。
- 前記第1の前駆体ガスは、アルミニウム、チタン、又はそれらの組み合わせを含有する、請求項1に記載の方法。
- 前記第1及び第2の前駆体層は、Al、Al2O3、AlN、AlON、Al含有前駆体、Al合金、CuAl、TiAlN、TaAlN、Ti、TiAlC、TiO2、TiON、TiN、Ti含有前駆体、Ti合金、及びそれらの組み合わせからなる群から選択される、請求項3に記載の方法。
- 前記材料の前記第1の層及び第2の層は、SiO2を含有する、請求項1に記載の方法。
- 前記第2の前駆体ガスは、シラノールガスを含む、請求項1に記載の方法。
- 前記シラノールガスは、トリス(tert-ペントキシ)シラノール、トリス(tert-ブトキシ)シラノール、及びビス(tert-ブトキシ)(イソプロポキシ)シラノールからなる群から選択される、請求項7に記載の方法。
- 第1の前駆体ガスはAlMe3を含有し、前記第2の前駆体ガスはトリス(tert-ペントキシ)シラノールを含有する、請求項1に記載の方法。
- 前記基板を前記第2の前駆体ガスに曝露するステップは、
いかなる酸化剤及び加水分解剤も存在しない場合、前記基板を、約150℃以下の基板温度で、シラノールを含有するプロセスガスに曝露するステップを含む、請求項1に記載の方法。 - 基板処理方法であって、
隆起フィーチャを含有する基板に、頂部領域及び側壁、並びに前記隆起フィーチャ間の底部領域を提供するステップと、
前記基板をガスパルスシーケンスに曝露して、前記隆起フィーチャ間にエアギャップを形成する材料を堆積させるステップと、
を含み、
前記ガスパルスシーケンスは、任意の順序で、
a)連続して、第1に、前記基板を第1の前駆体ガスに曝露して、前記頂部領域、前記側壁、及び前記底部領域に、第1の前駆体層をコンフォーマルに形成し、第2に、前記基板をプラズマ励起ハロゲン含有ガスに曝露して、前記頂部領域及び前記底部領域の前記第1の前駆体層を不活性化するか、又は少なくとも部分的に除去し、第3に、前記基板を前記第1の前駆体層と反応する第2の前駆体ガスに曝露して、前記側壁に前記材料の第1の層を形成するステップと、
b)連続して、第1に、前記基板を前記第1の前駆体ガスに曝露して、前記頂部領域、前記側壁、及び前記底部領域に、第2の前駆体層をコンフォーマルに形成し、第2に、前記基板を前記第2の前駆体層と反応する前記第2の前駆体ガスに曝露して、前記基板上に前記材料の第2の層を形成するステップと、
を含む、方法。 - 前記エアギャップが形成されるまで、ステップa)、b)、又はa)及びb)を少なくとも1回繰り返すことを更に含む、請求項11に記載の方法。
- 前記第1の前駆体ガスは、金属含有前駆体を含有する、請求項11に記載の方法。
- 前記第1の前駆体ガスは、アルミニウム、チタン、又はそれらの組み合わせを含有する、請求項11に記載の方法。
- 前記第1及び第2の前駆体層は、Al、Al2O3、AlN、AlON、Al含有前駆体、Al合金、CuAl、TiAlN、TaAlN、Ti、TiAlC、TiO2、TiON、TiN、Ti含有前駆体、Ti合金、及びそれらの組み合わせからなる群から選択される、請求項14に記載の方法。
- 前記材料の前記第1の層及び第2の層は、SiO2を含有する、請求項11に記載の方法。
- 前記第2の前駆体ガスは、シラノールガスを含む、請求項11に記載の方法。
- 前記シラノールガスは、トリス(tert-ペントキシ)シラノール、トリス(tert-ブトキシ)シラノール、及びビス(tert-ブトキシ)(イソプロポキシ)シラノールからなる群から選択される、請求項17に記載の方法。
- 前記基板を前記第2の前駆体ガスに前記曝露するステップは、
いかなる酸化剤及び加水分解剤も存在しない場合、前記基板を、約150℃以下の基板温度で、シラノールを含有するプロセスガスに曝露するステップを含む、請求項11に記載の方法。 - 前記プラズマ励起ハロゲン含有ガスは、Cl2、BCl3、CCl4、HCl、HBr、若しくはTiCl4、又はそれらの組み合わせを含む、請求項11に記載の方法。
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PCT/US2019/026590 WO2019199834A1 (en) | 2018-04-09 | 2019-04-09 | Method of forming a semiconductor device with air gaps for low capacitance interconnects |
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US20120040534A1 (en) | 2008-07-17 | 2012-02-16 | Micron Technology, Inc. | Gap processing |
US9520284B1 (en) | 2015-11-13 | 2016-12-13 | Varian Semiconductor Equipment Associates, Inc. | Ion beam activated directional deposition |
US20170229337A1 (en) | 2016-02-05 | 2017-08-10 | Lam Research Corporation | Systems and methods for creating airgap seals using atomic layer deposition and high density plasma chemical vapor deposition |
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