JP6356029B2 - メタルハードマスクおよびその製造方法 - Google Patents
メタルハードマスクおよびその製造方法 Download PDFInfo
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- 229910052751 metal Inorganic materials 0.000 title claims description 80
- 239000002184 metal Substances 0.000 title claims description 74
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000010408 film Substances 0.000 claims description 171
- 238000005530 etching Methods 0.000 claims description 42
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 31
- 239000013078 crystal Substances 0.000 claims description 20
- 239000011229 interlayer Substances 0.000 claims description 20
- 229910045601 alloy Inorganic materials 0.000 claims description 17
- 239000000956 alloy Substances 0.000 claims description 17
- 239000010409 thin film Substances 0.000 claims description 11
- 238000005240 physical vapour deposition Methods 0.000 claims description 9
- 229910052721 tungsten Inorganic materials 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 229910008332 Si-Ti Inorganic materials 0.000 claims description 5
- 229910006749 Si—Ti Inorganic materials 0.000 claims description 5
- 229910007729 Zr W Inorganic materials 0.000 claims description 5
- 238000004544 sputter deposition Methods 0.000 claims description 5
- 229910052726 zirconium Inorganic materials 0.000 claims description 5
- 229910018125 Al-Si Inorganic materials 0.000 claims description 4
- 229910018520 Al—Si Inorganic materials 0.000 claims description 4
- 238000000059 patterning Methods 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 17
- 238000012545 processing Methods 0.000 description 14
- 238000011156 evaluation Methods 0.000 description 13
- 238000002441 X-ray diffraction Methods 0.000 description 11
- 238000001228 spectrum Methods 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 7
- 238000001755 magnetron sputter deposition Methods 0.000 description 6
- 238000001020 plasma etching Methods 0.000 description 6
- 239000012528 membrane Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 3
- 125000001475 halogen functional group Chemical group 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- WMFYOYKPJLRMJI-UHFFFAOYSA-N Lercanidipine hydrochloride Chemical compound Cl.COC(=O)C1=C(C)NC(C)=C(C(=O)OC(C)(C)CN(C)CCC(C=2C=CC=CC=2)C=2C=CC=CC=2)C1C1=CC=CC([N+]([O-])=O)=C1 WMFYOYKPJLRMJI-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000007261 regionalization Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
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- H—ELECTRICITY
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- 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
- H01L21/02—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
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/3065—Plasma etching; Reactive-ion etching
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- 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
- H01L21/02—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
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31144—Etching the insulating layers by chemical or physical means using masks
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/18—Metallic material, boron or silicon on other inorganic substrates
- C23C14/185—Metallic material, boron or silicon on other inorganic substrates by cathodic sputtering
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02612—Formation types
- H01L21/02617—Deposition types
- H01L21/02631—Physical deposition at reduced pressure, e.g. MBE, sputtering, evaporation
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/033—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers
- H01L21/0334—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/0337—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane characterised by the process involved to create the mask, e.g. lift-off masks, sidewalls, or to modify the mask, e.g. pre-treatment, post-treatment
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- 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
- H01L21/71—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
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- 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
- H01L21/02—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
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
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- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Plasma & Fusion (AREA)
- Drying Of Semiconductors (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Physical Vapour Deposition (AREA)
Description
<メタルハードマスクの適用例>
図1は本発明の一実施形態に係るメタルハードマスクの適用例を示す断面図である。
メタルハードマスク103は、パターン化されたアモルファス合金膜からなる。メタルハードマスク103は、薄膜形成技術により膜形成した後、適宜の方法でパターン化することにより形成される。パターン化の手法としては、例えば、フォトリソグラフィーによりパターンが形成されたフォトレジストをマスクとしてプラズマエッチングすることを挙げることができる。
Al−Si(fccと他のcubicとの組み合わせ)
Si−Ti(他のcubicとhcpとの組み合わせ)
Nb−Ni(bccとfccとの組み合わせ)
Ta−Zr(bcc+tetragonalとhcpとの組み合わせ)
Ti−W(hcpとbccとの組み合わせ)
Zr−W(hcpとbccとの組み合わせ)
メタルハードマスク103を構成するアモルファス合金膜を形成するためには薄膜形成技術を用いるが、成膜時に加熱すると結晶化しやすいため、加熱しない成膜法を用いることが好ましく、そのような観点から物理蒸着法(PVD法)を好適に用いることができる。PVD法としては、スパッタリング、真空蒸着、イオンプレーティング等があるが、スパッタリング、例えばマグネトロンスパッタリングを好適に用いることができる。
このようにメタルハードマスクとして、薄膜形成技術、好適にはPVD法により成膜されたアモルファス合金膜を用いることにより、TiN膜のような結晶性の膜を用いた場合に比較して膜ストレスを著しく低くすることができる。具体的には、TiN膜では膜ストレスの絶対値が300MPa〜3GPa程度であったものを、100MPa以下に低減することができる。このため、被エッチング対象膜としてポーラスLow−k膜のような強度の低いものを用いた場合でも、配線のゆがみ(wiggling)を低減することができる。
次に、実験例について説明する。
ここでは、図5に示すように、Si基体上にSiO2膜を100nmの厚さで形成し、その上に評価金属膜を所定の厚さで形成した試料を用いて実験した。評価金属膜としては、PVD−Al20Si80、PVD−Si15Ti85、PVD−Ta50Zr50、PVD−Nb45Ni55、PVD−TiNの5種類を用いた。
最初に、各評価金属膜のうち、PVD−Al20Si80、PVD−Si15Ti85、PVD−Ta50Zr50、PVD−Nb45Ni55についてX線回折(XRD)により結晶性を評価した。ここでは、CuKα線によるout−of−plane測定とin−Plane測定を行った。各膜のXRDスペクトルを図6〜9に示す。
次に、各評価金属膜の膜ストレスを測定した。その結果を図10に示す。図10の縦軸は膜ストレスであり、プラス方向が圧縮ストレス、マイナス方向が引張ストレスであって、絶対値(ゼロからの距離)が膜ストレスの大きさである。また、各評価金属膜の値は、2つの試料の平均値である。
次に、各試料について、平行平板型プラズマエッチング装置を用いて評価合金膜をエッチングした。エッチングは、一般的な、トレンチエッチング条件(圧力:30Pa、高周波電力:HFのみ400W、直流電圧:50V、エッチングガス:C4F8、Ar、N2、O2、エッチング時間:60sec)、およびライナーエッチング条件(圧力:30Pa、高周波電力:HF100W、LF50W、直流電圧:50V、エッチングガス:C4F8、Ar、N2、O2、エッチング時間:60sec)を用いて行った。その結果を図11に示す。図11において(a)はトレンチエッチング条件の結果であり、(b)はライナーエッチング条件の結果である。
なお、本発明は、上記実施形態に限定されることなく種々変形可能である。例えば、上記実施形態では、層間絶縁膜をエッチングするためのメタルハードマスクを例にとって説明したが、これに限るものではない。
2;載置台
3;ターゲット
6;直流電源
7;マグネット
9;ガス導入ノズル
10;ガス供給配管
11;Arガス供給源
12;排気配管
13;真空ポンプ
102;層間絶縁膜
103;メタルハードマスク
104;トレンチ
W;半導体ウエハ
Claims (10)
- 被処理体に存在するエッチング対象膜としての層間絶縁膜であるポーラスLow−k膜をエッチングするためのメタルハードマスクであって、
薄膜形成技術で形成された膜ストレスの絶対値が100MPa以下のアモルファス合金膜からなることを特徴とするメタルハードマスク。 - 前記薄膜形成技術は、物理蒸着法であることを特徴とする請求項1に記載のメタルハードマスク。
- 物理蒸着法としてスパッタリングを用いることを特徴とする請求項2に記載のメタルハードマスク。
- 前記アモルファス合金膜は、二種類の金属元素からなり、各金属元素単独で得られる結晶構造どうしが異なる組み合わせであることを特徴とする請求項1から請求項3のいずれか1項に記載のメタルハードマスク。
- 前記アモルファス合金膜は、Al−Si、Si−Ti、Nb−Ni、Ta−Zr、Ti−W、およびZr−Wからなる群から選択される合金からなることを特徴とする請求項4に記載のメタルハードマスク。
- 被処理体に存在するエッチング対象膜としての層間絶縁膜であるポーラスLow−k膜をエッチングするためのメタルハードマスクの製造方法であって、
エッチング対象膜の上に薄膜形成技術により膜ストレスの絶対値が100MPa以下のアモルファス合金膜を成膜することと、
前記低膜ストレスのアモルファス合金膜をパターン化してメタルハードマスクを得ることと
を含むメタルハードマスクの製造方法。 - 前記薄膜形成技術は、物理蒸着法であることを特徴とする請求項6に記載のメタルハードマスクの製造方法。
- 物理蒸着法としてスパッタリングを用いることを特徴とする請求項7に記載のメタルハードマスクの製造方法。
- 前記アモルファス合金膜は、二種類の金属元素からなり、各金属元素単独で得られる結晶構造どうしが異なる組み合わせであることを特徴とする請求項6から請求項8のいずれか1項に記載のメタルハードマスクの製造方法。
- 前記アモルファス合金膜は、Al−Si、Si−Ti、Nb−Ni、Ta−Zr、Ti−W、およびZr−Wからなる群から選択される合金からなることを特徴とする請求項9に記載のメタルハードマスクの製造方法。
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JP2014194963A JP6356029B2 (ja) | 2014-09-25 | 2014-09-25 | メタルハードマスクおよびその製造方法 |
KR1020177010914A KR101923841B1 (ko) | 2014-09-25 | 2015-07-10 | 메탈 하드 마스크 및 그 제조 방법 |
PCT/JP2015/069900 WO2016047245A1 (ja) | 2014-09-25 | 2015-07-10 | メタルハードマスクおよびその製造方法 |
US15/513,718 US20170287727A1 (en) | 2014-09-25 | 2015-07-10 | Metal hard mask and method of manufacturing same |
TW104130606A TWI669756B (zh) | 2014-09-25 | 2015-09-16 | Metal hard mask and manufacturing method thereof |
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JP6356029B2 true JP6356029B2 (ja) | 2018-07-11 |
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KR102272778B1 (ko) * | 2016-11-07 | 2021-07-02 | 도쿄엘렉트론가부시키가이샤 | 하드 마스크 및 하드 마스크를 제조하는 방법 |
US10163633B2 (en) | 2017-03-13 | 2018-12-25 | Globalfoundries Inc. | Non-mandrel cut formation |
KR102549542B1 (ko) | 2017-09-12 | 2023-06-29 | 삼성전자주식회사 | 금속 하드마스크 및 반도체 소자의 제조 방법 |
JP7045954B2 (ja) | 2018-07-25 | 2022-04-01 | 東京エレクトロン株式会社 | ハードマスク用膜を形成する方法および装置、ならびに半導体装置の製造方法 |
US12037673B2 (en) * | 2018-09-27 | 2024-07-16 | Nippon Steel Chemical & Material Co., Ltd. | Metal mask material, method for manufacturing same, and metal mask |
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JP4128509B2 (ja) * | 2003-09-26 | 2008-07-30 | Tdk株式会社 | 情報記録媒体製造方法 |
JP2005317835A (ja) * | 2004-04-30 | 2005-11-10 | Semiconductor Leading Edge Technologies Inc | 半導体装置 |
JP2014078579A (ja) * | 2012-10-10 | 2014-05-01 | Renesas Electronics Corp | 半導体装置の製造方法 |
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KR101923841B1 (ko) | 2018-11-29 |
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US20170287727A1 (en) | 2017-10-05 |
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