JP4823386B2 - 透明導電膜製造用の酸化物焼結体 - Google Patents
透明導電膜製造用の酸化物焼結体 Download PDFInfo
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- JP4823386B2 JP4823386B2 JP2010530836A JP2010530836A JP4823386B2 JP 4823386 B2 JP4823386 B2 JP 4823386B2 JP 2010530836 A JP2010530836 A JP 2010530836A JP 2010530836 A JP2010530836 A JP 2010530836A JP 4823386 B2 JP4823386 B2 JP 4823386B2
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- film
- oxide
- tin
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- sintered body
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- 238000004519 manufacturing process Methods 0.000 title claims description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 35
- 229910003437 indium oxide Inorganic materials 0.000 claims description 31
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 claims description 31
- 229910052718 tin Inorganic materials 0.000 claims description 28
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 27
- 239000000654 additive Substances 0.000 claims description 27
- 230000000996 additive effect Effects 0.000 claims description 27
- 229910052759 nickel Inorganic materials 0.000 claims description 17
- 239000000758 substrate Substances 0.000 claims description 16
- 229910052738 indium Inorganic materials 0.000 claims description 13
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 13
- 238000005477 sputtering target Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000005530 etching Methods 0.000 description 30
- 238000004544 sputter deposition Methods 0.000 description 25
- 230000015572 biosynthetic process Effects 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 12
- 239000002019 doping agent Substances 0.000 description 12
- 239000000843 powder Substances 0.000 description 12
- 239000002994 raw material Substances 0.000 description 11
- 239000002245 particle Substances 0.000 description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 8
- 239000011572 manganese Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 229910052732 germanium Inorganic materials 0.000 description 7
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 6
- 238000002425 crystallisation Methods 0.000 description 6
- 230000008025 crystallization Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 6
- 229910052748 manganese Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000011812 mixed powder Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- RHZWSUVWRRXEJF-UHFFFAOYSA-N indium tin Chemical compound [In].[Sn] RHZWSUVWRRXEJF-UHFFFAOYSA-N 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229910000480 nickel oxide Inorganic materials 0.000 description 4
- 235000006408 oxalic acid Nutrition 0.000 description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 4
- 229910001887 tin oxide Inorganic materials 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000001755 magnetron sputter deposition Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000846 In alloy Inorganic materials 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000005280 amorphization Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001803 electron scattering Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- YBMRDBCBODYGJE-UHFFFAOYSA-N germanium dioxide Chemical compound O=[Ge]=O YBMRDBCBODYGJE-UHFFFAOYSA-N 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 150000002472 indium compounds Chemical class 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000002681 magnesium compounds Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000000896 monocarboxylic acid group Chemical group 0.000 description 1
- 150000002816 nickel compounds Chemical class 0.000 description 1
- GEVPUGOOGXGPIO-UHFFFAOYSA-N oxalic acid;dihydrate Chemical compound O.O.OC(=O)C(O)=O GEVPUGOOGXGPIO-UHFFFAOYSA-N 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
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- C04B35/453—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zinc, tin, or bismuth oxides or solid solutions thereof with other oxides, e.g. zincates, stannates or bismuthates
- C04B35/457—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zinc, tin, or bismuth oxides or solid solutions thereof with other oxides, e.g. zincates, stannates or bismuthates based on tin oxides or stannates
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- C04B35/62695—Granulation or pelletising
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- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
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Description
この様にITO膜の一部に結晶化した部分が生じると、その部分はエッチング速度が、非晶質の部分より、約2桁程小さいため、その後のエッチングの際に、いわゆる、エッチング残渣として残ってしまい、配線ショート等の問題を引き起こしてしまう。
しかし、水添加でのスパッタによって非晶質の膜を得ようとする方法には、数々の問題点がある。まず、スパッタ膜にパーティクルが発生してしまう場合が多い。パーティクルはスパッタ膜の平坦性や結晶性に悪影響を及ぼす。また、水を添加しなければパーティクルは発生しないことから、パーティクル発生の問題は水添加が原因である。
しかし、一方で、確実に非晶質のスパッタ膜を得るために、添加する水分濃度を高くしてしまうと、その後のアニールで膜が結晶化する際の結晶化温度が、非常に高くなり、得られる膜の抵抗率が、非常に高くなってしまうという問題が生じてしまう。
つまり、スパッタ膜全部を非晶質とするために、水添加でのスパッタによると、常に、チャンバー内の水濃度を把握、制御する必要があるが、それは非常に困難であるとともに、大変な手間と労力を要してしまうのである。
以下に酸化物焼結体の製造方法について説明する。
本発明の酸化物焼結体を製造するためには、まず、原料である酸化インジウム粉末、第一添加元素の酸化物粉末及び必要に応じて酸化スズ粉末を、所定の割合で秤量し、混合する。混合が不充分であると、製造したターゲットに第一添加元素の偏析により高抵抗率領域と低抵抗率領域が存在して、スパッタ成膜時に高抵抗率領域での帯電によるアーキング等の異常放電が起き易くなってしまう。原料として酸化物の形態以外のものを使用しても良いが、取り扱いの観点からは酸化物が好ましい。
昇温速度が4℃/分より小さいと、所定温度になるまでに不必要に時間を要してしまい、昇温速度が6℃/分より大きいと、炉内の温度分布が均一に上昇せずに、むらが生じてしまう。この様にして得られた焼結体の密度は、相対密度で98〜100%、例えば約99.9%、バルク抵抗は0.1〜3.0mΩcm、例えば約0.13mΩcm程度となる。
以下にスパッタリングターゲットの製造方法について説明する。
上記の様な製造条件によって得られた酸化物焼結体の外周の円筒研削、面側の平面研削をすることによって厚さ4〜6mm程度、直径はスパッタ装置に対応したサイズに加工し、銅製のバッキングプレートに、インジウム系合金などをボンディングメタルとして、貼り合わせることでスパッタリングターゲットとすることができる。
本発明の透明導電膜は、本発明のスパッタリングターゲットを用いて、アルゴンガス圧を0.4〜0.8Pa、ターゲットと基板間隔を50〜110mm、ガラスなどを基板として無加熱で、スパッタパワーを、例えば、ターゲットサイズが8インチの場合は、200〜900Wでスパッタ成膜することで得ることができる。スパッタ方式は直流マグネトロンスパッタとするのが好ましい。
以下に膜の特性評価方法について説明する。
上記の様にして得られた透明導電膜の結晶性の判定は、膜のX線回折測定(XRD測定)で結晶性の膜が示すようなピークの有無、シュウ酸による膜のエッチングで結晶性の膜が示すようなエッチング残渣が生じるかどうかから確認することができる。つまり、X線回折測定で酸化インジウムまたはITO結晶に起因する特有のピークがなく、エッチング残渣がない場合にその膜はアモルファスであると判定できる。
原料である酸化インジウム(In2O3)粉末及び酸化ニッケル(NiO)粉末を、原子数比でIn:Ni=98:2となるように秤量し、大気雰囲気中でスーパーミキサーにより、毎分3000回転、3分の混合を行った。
次に、混合粉に水を加えて、固形分50%のスラリーとして、直径1mmのジルコニアビーズで2時間の微粉砕を行い、混合粉の平均粒径(D50)を0.6μm以下とした。その後、PVA(ポリビニルアルコール)をスラリー1kgあたり125ccの割合で混合して、造粒機入口温度220℃、出口温度120℃、ディスク回転数9000rpmの条件で造粒した。
上記条件で得られた酸化物焼結体の外周の円筒研削、面側の平面研削をして、厚さ5mm程度、直径8インチとし、銅製のバッキングプレートに、インジウムをボンディングメタルとして、貼り合わせることでスパッタリングターゲットとした。
また、膜をシュウ酸:純水=5:95の重量比率で混合した液をエッチャントとして、エッチングを行ったが、エッチング残渣は認められなかった。
実施例1の焼結体組成を、各々表1の様に変化させて、その他の条件は、実施例1と同じ条件で行ったものが、実施例2〜30である。これら全ての場合について、成膜後の膜は非晶質で透明であり、エッチング残渣はなかった。ただし、Mn供給源は酸化マンガン(Mn2O3)、Al供給源は酸化アルミニウム(Al2O3)、ゲルマニウム供給源は酸化ゲルマニウム(GeO2)をそれぞれ使用した。
一方、膜のエッチングレートは、各種ドーパントの添加量の増加につれて、単調に増加した。
実施例1の焼結体組成を、各々表2の様に変化させて、その他の条件は、実施例1と同じ条件で行ったものが、実施例31〜60である。実施例1〜30は、酸化インジウムに各種ドーパントを添加した場合であったが、実施例31〜60はスズドープ酸化インジウムへ各種ドーパントを添加した場合の実施例である。Sn供給源としては酸化スズ(SnO2)を使用した。
さらに、スズを添加した場合は、添加しない場合と比較して、膜の抵抗率が更に低下した。そして、これらの膜の抵抗率は充分低く、ITO膜の抵抗率にも匹敵するほどの低さであり、透明導電膜として適切なものであった。
一方、膜のエッチングレートは、各種ドーパントの添加量の増加につれて、単調に増加した。
実施例1の焼結体組成を、各々表3の様に変化させて、その他の条件は、実施例1と同じ条件で行ったものが、比較例1〜12である。
Claims (3)
- 酸化インジウムを主成分とし、第一添加元素としてニッケル、マンガン、およびアルミニウムから選択される1種以上を含み、第一添加元素の含有量の合計が、インジウムと第一添加元素の合計量に対して、2〜12原子%であることを特徴とする非晶質膜。
- 酸化インジウムを主成分とし、第一添加元素としてニッケル、マンガン、およびアルミニウムから選択される1種以上を含み、第二添加元素としてスズを含み、第一添加元素の含有量の合計が、インジウムと第一添加元素とスズとの合計量に対して、2〜12原子%であり、スズの含有量が、インジウムとスズとの合計量に対して、2〜15原子%であることを特徴とする非晶質膜。
- 請求項1又は請求項2に記載の非晶質膜と同じ組成を有する酸化物焼結体をスパッタリングターゲットとして用い、基板を無加熱でスパッタすることを特徴とする非晶質膜の製造方法。
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JP5337016B2 (ja) * | 2009-12-25 | 2013-11-06 | Jx日鉱日石金属株式会社 | 焼結体スパッタリングターゲット、光記録媒体用薄膜の製造方法及び光記録媒体用薄膜 |
JP4935962B2 (ja) * | 2010-05-06 | 2012-05-23 | 東洋紡績株式会社 | 透明導電性フィルム及びその製造方法 |
CN108962724A (zh) | 2013-07-16 | 2018-12-07 | 住友金属矿山株式会社 | 氧化物半导体薄膜和薄膜晶体管 |
WO2020100692A1 (ja) * | 2018-11-13 | 2020-05-22 | 日東電工株式会社 | 光透過性積層体、タッチセンサおよび画像表示装置 |
TWI740216B (zh) * | 2019-09-24 | 2021-09-21 | 光洋應用材料科技股份有限公司 | 銦錫鎳氧化物靶材及其製造方法 |
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JPWO2010035716A1 (ja) | 2012-02-23 |
KR20110053388A (ko) | 2011-05-20 |
KR101099414B1 (ko) | 2011-12-27 |
WO2010035716A1 (ja) | 2010-04-01 |
KR101214422B1 (ko) | 2012-12-21 |
EP2327673A4 (en) | 2012-05-23 |
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Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |