JP2008052913A - 透明導電膜およびその製造方法 - Google Patents
透明導電膜およびその製造方法 Download PDFInfo
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- JP2008052913A JP2008052913A JP2006225056A JP2006225056A JP2008052913A JP 2008052913 A JP2008052913 A JP 2008052913A JP 2006225056 A JP2006225056 A JP 2006225056A JP 2006225056 A JP2006225056 A JP 2006225056A JP 2008052913 A JP2008052913 A JP 2008052913A
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- transparent conductive
- conductive film
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- titanium
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Abstract
【解決手段】Ga、TiおよびOから実質的になる透明導電膜。GaおよびTiの合計量(モル)に対し、Tiの量(モル)が0.02以上0.98以下である前記の透明導電膜。Ga、TiおよびOから実質的になる焼結体。GaおよびTiの合計量(モル)に対し、Tiの量(モル)が0.02以上0.98以下である前記の焼結体。チタンを含有する粉末と、ガリウムを含有する粉末とを混合して得られる混合物を成形して成形体を得、該成形体を焼結することにより得られる前記の焼結体。前記の焼結体をターゲットとして、パルス・レーザー蒸着法、スパッタリング法、イオンプレーティング法およびEB蒸着法から選ばれる方法により成膜する透明導電膜の製造方法。
【選択図】図1
Description
すなわち本発明は、下記の<1>〜<11>の発明を提供するものである。
<1>Ga、TiおよびOから実質的になる透明導電膜。
<2>GaおよびTiの合計量(モル)に対し、Tiの量(モル)が0.02以上0.98以下である前記<1>記載の透明導電膜。
<3>Ga、TiおよびOから実質的になる焼結体。
<4>GaおよびTiの合計量(モル)に対し、Tiの量(モル)が0.02以上0.98以下である前記<3>記載の焼結体。
<5>チタンを含有する粉末と、ガリウムを含有する粉末とを混合して得られる混合物を成形して成形体を得、該成形体を焼結することにより得られる前記<3>記載の焼結体。
<6>チタンを含有する粉末が、金属チタン粉末および酸化チタン粉末である前記<5>記載の焼結体。
<7>GaおよびTiの合計量(モル)に対し、Tiの量(モル)が0.02以上0.98以下である前記<5>または<6>記載の焼結体。
<8>チタンを含有する粉末と、ガリウムを含有する粉末とを混合して得られる混合物を成形して成形体を得、該成形体を焼結する前記<3>記載の焼結体の製造方法。
<9>チタンを含有する粉末が、金属チタン粉末および酸化チタン粉末である前記<8>記載の焼結体の製造方法。
<10>前記<3>〜<7>のいずれかに記載の焼結体または前記<8>もしくは<9>記載の製造方法により得られた焼結体をターゲットとして、パルス・レーザー蒸着法、スパッタリング法、イオンプレーティング法およびEB蒸着法から選ばれる方法により成膜する透明導電膜の製造方法。
<11>成膜時の雰囲気の酸素分圧が1Pa未満である前記<10>記載の透明導電膜の製造方法。
本発明の透明導電膜は、次のようにして製造される。すなわち、Ga、TiおよびOから実質的になる焼結体をターゲットとして、パルス・レーザー蒸着法、スパッタリング法、イオンプレーティング法およびEB蒸着法から選ばれる方法により成膜することにより製造される。該焼結体は、GaおよびTiの合計量(モル)に対し、Tiの量(モル)が0.02以上0.98以下であることが好ましく、より好ましくは、0.10以上0.95以下である。
酸化チタン粉末(TiO2、和光純薬製、特級)、金属チタン粉末(Ti、株式会社高純度化学製、純度99.99%)および酸化ガリウム粉末(Ga2O3、多摩化学製)をモル比でTiO2:Ti:Ga2O3=1:1:1(Ti:Gaのモル比は1:1である。)となるように秤量し混合した。得られた混合物について、金型を用いて一軸プレスにより500kg/cm2の圧力で円板状に成形した後、冷間静水圧プレスにより1800kg/cm2の圧力で加圧して成形体を得た。得られた成形体を窒素ガス雰囲気中において常圧で1400℃で48時間保持して焼結し、焼結体を得た。該焼結体を加工し、20mmφのターゲットとして、パルス・レーザー蒸着装置(誠南工業株式会社製PS−2000)内に設置した。基板としてサファイア基板を用い、パルス・レーザー蒸着装置内で、ターゲットに対向させて設置し、ヒーターによって800℃に加熱した。KrFエキシマレーザー光(ラムダ・フィジクス(株)社製レーザー発光装置 Comex205型)をターゲットに照射し、サファイア基板上に透明導電膜を成膜させ、透明導電膜1を得た。この成膜時のパルス・レーザー蒸着の条件は、成膜時間60分間、圧力10-3Pa、基板温度800℃、レーザーの出力150mJ、パルス周波数20Hzとした。
抵抗率(Ωcm)=表面抵抗(Ω/□)×膜厚(cm) (1)
また、透明導電膜1を成膜したサファイア基板について、光透過率を可視分光光度計(大塚電子株式会社、MCPD-1000)を用いて、JIS R 1635に規定された方法により測定したところ、透明導電膜1を成膜したサファイア基板の380nm〜780nmの波長における光透過率は60%であった。また、サファイア基板の380nm〜780nmの波長における平均の光透過率は87%であった。
パルス・レーザー蒸着の条件を、成膜時間30分間、圧力10-3Pa、基板温度800℃、レーザーの出力150mJ、パルス周波数20Hzとした以外は、実施例1と同様にして、透明導電膜2を得た。
実施例1と同様にして得られた焼結体を50mmφのターゲットとしてスパッタ装置(キャンノンアネルバエンジニアリング株式会社製E−200S)内に設置した。基板としてサファイア基板を用い、スパッタ装置内で、ターゲットに対向させて設置し、ランプヒーターによって800℃に加熱した。スパッタの条件を、スパッタ成膜時間55分間、Ar雰囲気圧力0.5Pa、基板温度800℃、RFスパッタで投入電力50Wとし、サファイア基板上に透明導電膜を成膜させ、透明導電膜3を得た。
酸化チタン粉末(TiO2、和光純薬製、特級)、酸化ガリウム粉末(Ga2O3、多摩化学製)をモル比でTiO2:Ga2O3=2:1(Ti:Gaのモル比は1:1である。)となるように秤量し混合した。得られた混合物について、金型を用いて一軸プレスにより500kg/cm2の圧力で円板状に成形した後、冷間静水圧プレスにより1800kg/cm2の圧力で加圧して成形体を得た。得られた成形体を窒素ガス雰囲気中において常圧で1400℃で3時間保持して焼結し、焼結体を得た。該焼結体をターゲットとしてスパッタ装置(キャンノンアネルバエンジニアリング株式会社製E−200S)内に設置した。基板としてサファイア基板を用い、スパッタ装置内で、ターゲットに対向させて設置し、ランプヒーターによって800℃に加熱した。スパッタの条件を、スパッタ成膜時間50分間、Ar雰囲気圧力0.5Pa、基板温度800℃、RFスパッタで投入電力50Wとし、サファイア基板上に透明導電膜を成膜させ、透明導電膜4を得た。
酸化ガリウム粉末(Ga2O3、多摩化学製)、酸化スズ粉末(SnO2、○○製、○特級)をモル比でGa2O3:SnO2=47.5:5(Ga:Snのモル比は95:5である。)となるように秤量し混合した。得られた混合物について、金型を用いて一軸プレスにより500kg/cm2の圧力で円板状に成形した後、冷間静水圧プレスにより1800kg/cm2の圧力で加圧して成形体を得た。得られた成形体を酸素ガス雰囲気中において常圧で1600℃で3時間保持して焼結し、焼結体を得た。該焼結体を加工し、φ20mmのターゲットとして、パルス・レーザー蒸着装置(誠南工業株式会社製PS−2000)内に設置した。基板としてサファイア基板を用い、パルス・レーザー蒸着装置内で、ターゲットに対向させて設置し、ヒーターによって800℃に加熱した。KrFエキシマレーザー光(ラムダ・フィジクス(株)社製レーザー発光装置 Comex205型)をターゲットに照射し、サファイア基板上に膜を成膜させ、膜5を得た。この成膜時のパルス・レーザー蒸着の条件は、成膜時間60分間、圧力10Pa、基板温度800℃、レーザーの出力150mJ、パルス周波数20Hzとした。
Claims (11)
- Ga、TiおよびOから実質的になる透明導電膜。
- GaおよびTiの合計量(モル)に対し、Tiの量(モル)が0.02以上0.98以下である請求項1記載の透明導電膜。
- Ga、TiおよびOから実質的になる焼結体。
- GaおよびTiの合計量(モル)に対し、Tiの量(モル)が0.02以上0.98以下である請求項3記載の焼結体。
- チタンを含有する粉末と、ガリウムを含有する粉末とを混合して得られる混合物を成形して成形体を得、該成形体を焼結することにより得られる請求項3記載の焼結体。
- チタンを含有する粉末が、金属チタン粉末および酸化チタン粉末である請求項5記載の焼結体。
- GaおよびTiの合計量(モル)に対し、Tiの量(モル)が0.02以上0.98以下である請求項5または6記載の焼結体。
- チタンを含有する粉末と、ガリウムを含有する粉末とを混合して得られる混合物を成形して成形体を得、該成形体を焼結する請求項3記載の焼結体の製造方法。
- チタンを含有する粉末が、金属チタン粉末および酸化チタン粉末である請求項8記載の焼結体の製造方法。
- 請求項3〜7のいずれかに記載の焼結体または請求項8もしくは9記載の製造方法により得られた焼結体をターゲットとして、パルス・レーザー蒸着法、スパッタリング法、イオンプレーティング法およびEB蒸着法から選ばれる方法により成膜する透明導電膜の製造方法。
- 成膜時の雰囲気の酸素分圧が1Pa未満である請求項10記載の透明導電膜の製造方法。
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JP2006225056A JP2008052913A (ja) | 2006-08-22 | 2006-08-22 | 透明導電膜およびその製造方法 |
PCT/JP2007/066066 WO2008023651A1 (fr) | 2006-08-22 | 2007-08-13 | Pellicule transparente conductrice, corps fritté et leurs procédés de production |
KR1020097003090A KR20090042254A (ko) | 2006-08-22 | 2007-08-13 | 투명 도전막, 소결체 및 그들의 제조 방법 |
US12/376,154 US7901597B2 (en) | 2006-08-22 | 2007-08-13 | Transparent conductive film, sintered body, and their production methods |
CNA2007800309884A CN101506908A (zh) | 2006-08-22 | 2007-08-13 | 透明导电膜、烧结体及它们的制造方法 |
TW096130287A TW200816237A (en) | 2006-08-22 | 2007-08-16 | Transparent conductive film, sintered object and manufacturing methods thereof |
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WO2000055091A1 (fr) | 1999-03-12 | 2000-09-21 | Nagase Chemtex Corporation | Compositions de formation de couches minces d'oxyde metallique |
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