JP6192646B2 - 高性能な電気的に安定した半導電性の金属酸化物層の製造法、当該方法により製造された層および当該層の使用 - Google Patents
高性能な電気的に安定した半導電性の金属酸化物層の製造法、当該方法により製造された層および当該層の使用 Download PDFInfo
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- JP6192646B2 JP6192646B2 JP2014533817A JP2014533817A JP6192646B2 JP 6192646 B2 JP6192646 B2 JP 6192646B2 JP 2014533817 A JP2014533817 A JP 2014533817A JP 2014533817 A JP2014533817 A JP 2014533817A JP 6192646 B2 JP6192646 B2 JP 6192646B2
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- metal oxide
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- metal
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- 239000012702 metal oxide precursor Substances 0.000 claims description 48
- 230000015572 biosynthetic process Effects 0.000 claims description 40
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- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 29
- 239000000758 substrate Substances 0.000 claims description 29
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- 229910001195 gallium oxide Inorganic materials 0.000 claims description 24
- 239000011787 zinc oxide Substances 0.000 claims description 24
- 239000012298 atmosphere Substances 0.000 claims description 23
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Description
本発明は、第1の金属酸化物層および第2の金属酸化物層および誘電体層を含む半導体積層物の製造法に関し、その際に第1の金属酸化物層は、第2の金属酸化物層と誘電体層との間に配置されている。第1の金属酸化物層および第2の金属酸化物層は、相応して第1の液相および第2の液相から形成される。同様に、本発明は、当該法により得られた半導体積層物ならびに当該半導体積層物を含む電子構造部品に関する。
半導電性金属酸化物、例えばZnO、In2O3およびSnO2は、文献においてよく知られている。前記半導電性金属酸化物は、高い電荷キャリア移動度と同時に光透過性を提供する。商業的利用において、半導電性金属酸化物は、現在、スパッタリングまたは別の析出法を用いて気相から施される。
本発明は、第1の金属酸化物層、第2の金属酸化物層および誘電体層を含む半導体積層物の製造法であって、その際に第1の金属酸化物層は、第2の金属酸化物層と誘電体層との間に配置されている、前記方法に関し、当該方法は、
(i)第1の液相からの、酸化インジウム、酸化ガリウム、酸化亜鉛、酸化錫またはこれらの混合物からなる群から選択された、少なくとも1つの金属酸化物を含有する第1の金属酸化物層の形成と、
この場合、第1の金属酸化物層は、20nm以下の層厚を有し、および第1の液相は、少なくとも1つの金属酸化物または少なくとも1つの金属酸化物前駆体を含有し、当該金属酸化物は、酸化インジウム、酸化ガリウム、酸化亜鉛、酸化錫またはこれらの混合物からなる群から選択され、
(ii)第2の液相からの、酸化ガリウム、酸化亜鉛、酸化錫、酸化ハフニウム、酸化ケイ素、酸化アルミニウム、酸化チタン、アルカリ金属酸化物、アルカリ土類金属酸化物またはこれらの混合物からなる群から選択された、少なくとも1つの金属酸化物を含有する第2の金属酸化物層の形成とを含み、
この場合、第2の液相は、少なくとも1つの金属酸化物または少なくとも1つの金属酸化物前駆体を含有し、当該金属酸化物は、酸化ガリウム、酸化亜鉛、酸化錫、酸化ハフニウム、酸化ケイ素、酸化アルミニウム、酸化チタン、アルカリ金属酸化物、アルカリ土類金属酸化物またはこれらの混合物からなる群から選択され、
その際に第1の層の少なくとも1つの金属酸化物と第2の層の少なくとも1つの金属酸化物とは、同じでない。
図1は、例示的に、公知技術水準から公知の半導体素子(10)の略示された構造を示す。前記素子は、基板(20)、ゲート電極(30)、誘電体層(40)、活性の半導電性の金属酸化物層(50)および接点電極位置(60)を含む。前記半導体構造素子(10)のそれぞれの構造は、誘電体層(40)および基板(20)に対する半導体層(50)の相対的配置の点で、ならびに接点電極位置(60)のポジションの点で異なる。前記構造素子は、これらの構造に相応して、以下のように、a)ボトムゲートトップコンタクト(BGTC)、b)ボトムゲートボトムコンタクト(BGBC)、c)トップゲートトップコンタクト(TGTC)およびトップゲートボトムコンタクト(TGBC)と呼ばれる。
冒頭の記載と同様に、半導体製造の方法は、気相成長のせいで費用が掛かりかつ高価である。したがって、現在の半導体研究の目的は、適した半導体を製造する液相法を開発することである。それというのも、当該法は、技術的に簡単に実現されるべきであり、かつより安価になるからである。これまで、当該法の使用は、前記方法を用いて、不足した電気的安定性を有する半導体だけが製造されうることによって制限されている。
(i)第1の液相からの、酸化インジウム、酸化ガリウム、酸化亜鉛、酸化錫またはこれらの混合物からなる群から選択された、少なくとも1つの金属酸化物を含有する第1の金属酸化物層の形成と、
この場合、第1の金属酸化物層は、20nm以下の層厚を有し、および第1の液相は、少なくとも1つの金属酸化物または少なくとも1つの金属酸化物前駆体を含有し、当該金属酸化物は、酸化インジウム、酸化ガリウム、酸化亜鉛、酸化錫またはこれらの混合物からなる群から選択され、
(ii)第2の液相からの、酸化ガリウム、酸化亜鉛、酸化錫、酸化ハフニウム、酸化ケイ素、酸化アルミニウム、酸化チタン、アルカリ金属酸化物、アルカリ土類金属酸化物またはこれらの混合物からなる群から選択された、少なくとも1つの金属酸化物を含有する第2の金属酸化物層の形成とを含み、
この場合、第2の液相は、少なくとも1つの金属酸化物または少なくとも1つの金属酸化物前駆体を含有し、当該金属酸化物は、酸化ガリウム、酸化亜鉛、酸化錫、酸化ハフニウム、酸化ケイ素、酸化アルミニウム、酸化チタン、アルカリ金属酸化物、アルカリ土類金属酸化物またはこれらの混合物からなる群から選択され、
その際に第1の層の少なくとも1つの金属酸化物と第2の層の少なくとも1つの金属酸化物とは、同じでない。
例1:半導体積層物の製造
約15mmの辺長を有しかつ約200nmの厚さの酸化ケイ素被覆およびITO/金からなるフィンガー構造を有する、ドープされたシリコン基板を使用した。
a.UV架橋(10分間のUV処理)、続いて
b.熱処理(空気中で350℃で1時間)により
行なった。
c.UV架橋(10分間のUV処理)、続いて
d.熱処理(空気中で350℃で1時間)により
行なった。
この比較例を例1と同様に実施したが、今度は、第2の金属酸化物層が第1の金属酸化物層上に形成されることはなかった。その代わりに、インジウム前駆体を含有する第1の液相に様々な量の亜鉛前駆体を混和した。1つの金属酸化物層だけを有する半導体の電荷キャリア移動度を試験した。第1の液相中の既に数パーセントの亜鉛前駆体は、電荷キャリア移動度の激しい低下をまねくことが判明した(図3参照)。
Claims (20)
- 第1の金属酸化物層、第2の金属酸化物層および誘電体層を含む半導体積層物を製造する方法であって、その際に第1の金属酸化物層は、第2の金属酸化物層と誘電体層との間に配置されている、前記方法において、
当該方法は、
第1の液相からの、酸化インジウム、酸化ガリウム、酸化亜鉛、酸化錫またはこれらの混合物からなる群から選択された、少なくとも1つの金属酸化物を含有する第1の金属酸化物層の形成と、
この場合、第1の金属酸化物層は、20nm以下の層厚を有し、および第1の液相は、少なくとも1つの金属酸化物または少なくとも1つの金属酸化物前駆体を含有し、当該金属酸化物は、酸化インジウム、酸化ガリウム、酸化亜鉛、酸化錫またはこれらの混合物からなる群から選択され、
第2の液相からの、ZnO、Ga 2 O 3 、HfO 2 、シリコンガリウムオキサイドまたはシリコンハフニウムオキサイドからなる群から選択された、少なくとも1つの金属酸化物からなる第2の金属酸化物層の形成とを含み、
この場合、第2の液相は、少なくとも1つの金属酸化物または少なくとも1つの金属酸化物前駆体を含有し、当該金属酸化物は、ZnO、Ga 2 O 3 、HfO 2 、シリコンガリウムオキサイドまたはシリコンハフニウムオキサイドからなる群から選択され、
その際に第1の層の少なくとも1つの金属酸化物と第2の層の少なくとも1つの金属酸化物とは、同じでなく、
第1の金属酸化物層および/または第2の金属酸化物層の形成は、さらに第1の液相および/または第2の液相の熱処理を含み、且つ
第1の金属酸化物層および/または第2の金属酸化物層の形成は、電磁線での第1の液相および/または第2の液相の照射を含む、
前記方法。 - 第1の金属酸化物層は、0.5〜20nmの層厚を有する、請求項1記載の方法。
- 第2の金属酸化物層は、少なくとも第1の金属酸化物層の層厚を有する、請求項1または2記載の方法。
- 第2の金属酸化物層は、第1の金属酸化物層内に含まれていない、少なくとも1つの金属酸化物を含む、請求項1から3までのいずれか1項に記載の方法。
- 第2の金属酸化物層は、少なくとも2つの金属酸化物を含む、請求項1から4までのいずれか1項に記載の方法。
- 第1の金属酸化物層は、少なくとも2つの金属酸化物を含む、請求項1から5までのいずれか1項に記載の方法。
- 第1の金属酸化物層は、酸化インジウム(In2O3)またはインジウムガリウムオキサイドからなる、請求項1から6までのいずれか1項に記載の方法。
- 第1の金属酸化物層の形成は、
第1の金属酸化物層を誘電体層上に形成させるために、
誘電体層上への第1の液相の施与および
誘電体層上での第1の液相の少なくとも1つの金属酸化物または少なくとも1つの金属酸化物前駆体の析出を含み、および
第2の金属酸化物層の形成は、
第2の金属酸化物層を第1の金属酸化物層上に形成させるために、
第1の金属酸化物層上への第2の液相の施与および
第1の金属酸化物層上での第2の液相の少なくとも1つの金属酸化物または少なくとも1つの金属酸化物前駆体の析出を含む、請求項1から7までのいずれか1項に記載の方法。 - 第2の金属酸化物層の形成は、
第2の金属酸化物層を基板上に形成させるために、
前記基板上での第2の液相の施与および
前記基板上での第2の液相の少なくとも1つの金属酸化物または少なくとも1つの金属酸化物前駆体の析出を含み、および
第1の金属酸化物層の形成は、
第1の金属酸化物層を第2の金属酸化物層上に形成させるための、第2の金属酸化物層上への第1の液相の施与および
第2の金属酸化物層上での第1の液相の少なくとも1つの金属酸化物または少なくとも1つの金属酸化物前駆体の析出ならびに
第1の金属酸化物層上への誘電体層の施与を含む、請求項1から8までのいずれか1項に記載の方法。 - 第1の液相および/または第2の液相は、印刷法、噴霧法、回転被覆法、浸漬法およびスロットダイコーティングからなる群から選択される方法によって施与される、請求項1から9までのいずれか1項に記載の方法。
- 第1の液相および/または第2の液相の少なくとも1つの金属酸化物前駆体は、金属アルコキシドおよび/または金属オキソアルコキシドの種類に由来する、請求項1から10までのいずれか1項に記載の方法。
- 第1の液相および/または第2の液相は、少なくとも1つの有機溶剤を含む、請求項11記載の方法。
- 前記有機溶剤は、水を最大500ppm有する、請求項12記載の方法。
- 第1の液相および/または第2の液相は、金属酸化物粒子のタイプの少なくとも1つの金属酸化物を含む、請求項1から10までのいずれか1項に記載の方法。
- 第1の液相および/または第2の液相は、水相を含む、請求項1から11までのいずれか1項または請求項14に記載の方法。
- 第1の金属酸化物層および/または第2の金属酸化物層を、酸素含有雰囲気下で形成させる、請求項1から15までのいずれか1項に記載の方法。
- 第1の金属酸化物層および/または第2の金属酸化物層を、100〜450℃の温度で熱処理する、請求項1から16までのいずれか1項に記載の方法。
- 第1の金属酸化物層は、0.5〜10nmの層厚を有する、請求項1から17までのいずれか1項に記載の方法。
- 電子構造部品を製造するための、請求項1から18までのいずれか1項に記載の方法。
- 前記電子構造部品がトランジスタ、薄膜トランジスタ、ダイオード、ソーラーセル、センサー、RFIDタグまたはディスプレイ用のTFTバックパネルである、請求項19記載の方法。
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DE102010043668B4 (de) | 2010-11-10 | 2012-06-21 | Evonik Degussa Gmbh | Verfahren zur Herstellung von Indiumoxid-haltigen Schichten, nach dem Verfahren hergestellte Indiumoxid-haltige Schichten und ihre Verwendung |
JP6150038B2 (ja) * | 2013-03-13 | 2017-06-21 | セイコーエプソン株式会社 | 液体噴射ヘッド、液体噴射装置、圧電素子、超音波トランスデューサー及び超音波デバイス |
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2011
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- 2012-09-12 IN IN3328CHN2014 patent/IN2014CN03328A/en unknown
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Also Published As
Publication number | Publication date |
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TW201334070A (zh) | 2013-08-16 |
IN2014CN03328A (ja) | 2015-07-03 |
TWI555088B (zh) | 2016-10-21 |
EP2748857B1 (de) | 2018-06-13 |
RU2601210C2 (ru) | 2016-10-27 |
JP2015501529A (ja) | 2015-01-15 |
US9059299B2 (en) | 2015-06-16 |
WO2013050221A1 (de) | 2013-04-11 |
RU2014118033A (ru) | 2015-11-27 |
CN103959478A (zh) | 2014-07-30 |
KR20140072148A (ko) | 2014-06-12 |
KR102060492B1 (ko) | 2020-02-11 |
DE102011084145A1 (de) | 2013-04-11 |
CN103959478B (zh) | 2016-10-26 |
EP2748857A1 (de) | 2014-07-02 |
US20150053966A1 (en) | 2015-02-26 |
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