JP4505683B2 - ナノチューブリボンを利用した電気機械式メモリアレイ及びその製造方法 - Google Patents
ナノチューブリボンを利用した電気機械式メモリアレイ及びその製造方法 Download PDFInfo
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Description
本発明は電子装置のメモリ保存装置として使用する非揮発性メモリ装置に関し、特に、それらの個々のメモリセルとして電気機械式要素を使用した非揮発性メモリアレイに関する。
電子装置のメモリセルの重要な特徴は安価、非揮発性、高密度、低消費電力及び高速である。従来のメモリソリューションはROM、PROM、EPROM、EEPROM、DRAM及びSRAM等である。
本発明はメモリセル等の電気機械式回路とその製造方法を提供する。この回路は導電トレースと基板表面から延び出るサポート及び導電トレースを横断するサポートで懸垂されたナノチューブリボンを有した構造を含んでいる。それぞれのリボンはナノチューブを含んでいる。
本発明の好適実施例は新規な電気機械式メモリアレイとその製造方法を提供する。特に、電気機械式メモリセルはWO01/03208で開示されているNTWCM装置と同様に動作する。しかし、そのNTWCM装置とは異なり、本発明の好適実施例はNTWCM装置で使用される懸垂ナノチューブワイヤをナノチューブのマット化層またはナノチューブの不織布で成る新規なリボンで置換している。これら新規な装置をナノチューブリボンクロスバーメモリ(NTRCM)と呼称することにする。この新規なナノチューブベルト構造は望む集積程度とサイズにてさらに容易に製造でき、その形状はさらに容易に制御できる。
他の実施例
カーボンナノチューブ以外にも電気機械スイッチ機能に適した電気機械特性を備えた物質でも利用できる。それら物質はカーボンナノチューブと類似した特性を有するであろうが、異なり、減少した引っ張り強度のものであろう。その場合、その物質の引っ張り歪みと接着エネルギーは下落してジャンクションの双安定性と電気機械スイッチ特性を許容範囲内で存在させなければならない。
Claims (46)
- 電気機械式回路要素の製造方法であって、
導電トレースと、基板表面から延び出るサポートとを有した構造体を提供するステップと、
該サポート上にナノチューブ層を提供するステップと、
該ナノチューブ層の部分を選択的に剥離させ、前記導電トレースを横断し、該サポートにより懸垂される、それぞれ1または複数のナノチューブを含んだ複数のナノチューブリボンを形成させるステップと、を含んで構成されることを特徴とする方法。 - 構造体を提供するステップは導電トレースがドープされたシリコントレースである構造体を提供することを特徴とする請求項1記載の方法。
- 構造体を提供するステップはサポートが物質の列で形成され、導電トレースは該列に実質的に平行である構造体を提供することを特徴とする請求項1記載の方法。
- 導電トレースはサポートとは分離されていることを特徴とする請求項3記載の方法。
- 導電トレースはサポートと接触することを特徴とする請求項3記載の方法。
- 導電トレースはサポートとは分離されていることを特徴とする請求項1記載の方法。
- 導電トレースはサポートと接触することを特徴とする請求項1記載の方法。
- 構造体を提供するステップはサポートが窒化ケイ素製である構造体を提供することを特徴とする請求項1記載の方法。
- 構造体を提供するステップは導電トレースが絶縁材料層上に提供され、導電トレースを互いに絶縁させている構造体を提供することを特徴とする請求項1記載の方法。
- 構造体を提供するステップは導電トレースがそれぞれ絶縁材料層上に提供され、導電トレースを互いに絶縁させている構造体を提供することを特徴とする請求項1記載の方法。
- ナノチューブ層を提供するステップはナノチューブの不織布を提供することを特徴とする請求項1記載の方法。
- 不織布は構造体上で成長することを特徴とする請求項11記載の方法。
- 構造体は導電トレース上に除去可能な犠牲層を含んでおり、前記ナノチューブの不織布を該犠牲層上で成長させた後、前記犠牲層が除去されることを特徴とする請求項11記載の方法。
- 構造体は触媒で処理され、不織布の成長が促進されることを特徴とする請求項12記載の方法。
- 犠牲層の上面は触媒で処理され、不織布の成長が促進されることを特徴とする請求項13記載の方法。
- 選択的に剥離させるステップはナノチューブ層をパターン処理してエッチング処理するステップを含んでいることを特徴とする請求項1記載の方法。
- 選択的に剥離させるステップはナノチューブの不織布をパターン処理及びエッチング処理してリボンを形成するステップを含んでいることを特徴とする請求項11記載の方法。
- ナノチューブは、構造体の表面上で、該構造体のX軸方向及びY軸方向に抑制されずに成長することを特徴とする請求項12記載の方法。
- パターン処理とエッチング処理は不織布を介して拡散するエチャントを使用することを特徴とする請求項16記載の方法。
- ナノチューブ層は実質的に単層であることを特徴とする請求項1記載の方法。
- 回路要素の製造方法であって、
所定の方向性で少なくとも1つの導電トレースを有した構造体を提供するステップと、
ナノチューブ層を提供するステップと、
該ナノチューブ層の部分を選択的に剥離させ、前記導電トレースを離れた状態で横断し、複数のサポートにより懸垂される、ナノチューブリボンを形成させるステップと、
を含んで構成されることを特徴とする方法。 - 選択的に剥離させるステップはナノチューブ層をパターン処理してエッチング処理し、リボンを形成させるステップを含んでいることを特徴とする請求項21記載の方法。
- 回路要素の製造方法であって、
所定の方向性で少なくとも1つの導電トレースを有した構造体を提供するステップと、
ナノチューブの布を提供するステップと、
所定のパターンに従って該ナノチューブ布の部分を選択的に剥離させ、リボンが導電トレースを離れた状態で横断するように、複数のサポートにより懸垂される、少なくとも1つのナノチューブを有したリボンを形成させるステップと、
を含んで構成されることを特徴とする方法。 - 選択的に剥離させるステップはナノチューブ布をパターン処理してエッチング処理し、リボンを形成させるステップを含んでいることを特徴とする請求項23記載の方法。
- システムであって、
導電トレースを有した構造体と、
電気接触状態の複数のナノチューブを有し、該導電トレースから離れて横断するように提供され、複数のサポートにより懸垂されるナノチューブリボンと、
を含んで構成されていることを特徴とするシステム。 - システムであって、
導電トレースを有した構造体と、
複数のナノチューブを有し、所定の形状であり、前記導電トレースから離れて横断するように提供され、複数のサポートにより懸垂されるナノチューブリボンと、
を含んで構成されていることを特徴とするシステム。 - 電気機械的回路であって、
導電トレースと、基板の表面から延び出るサポートとを有した構造体と、
前記サポートにより懸垂される複数のナノチューブを有し、該導電トレースを横断し、該サポートによって懸垂される、それぞれ平坦である複数のナノチューブリボンと、
を含んで構成されていることを特徴とする回路。 - 導電トレースがドープされたシリコントレースであることを特徴とする請求項27記載の回路。
- サポートが物質の列で形成され、導電トレースは該列に実質的に平行であることを特徴とする請求項27記載の回路。
- 導電トレースはサポートとは分離されていることを特徴とする請求項27記載の回路。
- トレースはサポートと接触することを特徴とする請求項27記載の回路。
- サポートが窒化ケイ素製であることを特徴とする請求項27記載の回路。
- 導電トレースが絶縁材料層上に提供され、導電トレースを互いに絶縁させていることを特徴とする請求項27記載の回路。
- 導電トレースがそれぞれ絶縁材料層上に提供され、導電トレースを互いに絶縁させていることを特徴とする請求項27記載の回路。
- リボンがナノチューブの不織布であることを特徴とする請求項27記載の回路。
- リボンが実質的にナノチューブの単層であることを特徴とする請求項27記載の回路。
- 電気機械式回路であって、
導電トレースと、基板表面から延び出るサポートとを有した構造体と、
該導電トレースを横断し、該サポートで懸垂されたナノチューブリボンと、
を含んで構成され、それぞれのリボンは複数のナノチューブを含んでいることを特徴とする回路。 - 導電トレースがドープされたシリコントレースであることを特徴とする請求項37記載の回路。
- サポートが物質の列で形成され、導電トレースは該列に実質的に平行であることを特徴とする請求項37記載の回路。
- 導電トレースはサポートとは分離されていることを特徴とする請求項37記載の回路。
- トレースはサポートと接触することを特徴とする請求項37記載の回路。
- サポートが窒化ケイ素製であることを特徴とする請求項37記載の回路。
- 導電トレースが絶縁材料層上に提供され、導電トレースを互いに絶縁させていることを特徴とする請求項37記載の回路。
- 導電トレースがそれぞれ絶縁材料層上に提供され、導電トレースを互いに絶縁させていることを特徴とする請求項37記載の回路。
- リボンがナノチューブの不織布であることを特徴とする請求項37記載の回路。
- リボンが実質的にナノチューブの単層であることを特徴とする請求項37記載の回路。
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PCT/US2002/023859 WO2003021613A2 (en) | 2001-07-25 | 2002-07-25 | Electromechanical memory array using nanotube ribbons and method for making same |
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JP2005502201A (ja) | 2005-01-20 |
US6919592B2 (en) | 2005-07-19 |
US7056758B2 (en) | 2006-06-06 |
CA2454834A1 (en) | 2003-03-13 |
EP1410429A2 (en) | 2004-04-21 |
US7719067B2 (en) | 2010-05-18 |
KR20080007682A (ko) | 2008-01-22 |
TW200412685A (en) | 2004-07-16 |
CN100466181C (zh) | 2009-03-04 |
US20030021966A1 (en) | 2003-01-30 |
US20090283803A1 (en) | 2009-11-19 |
US8400053B2 (en) | 2013-03-19 |
CN1557016A (zh) | 2004-12-22 |
WO2003021613A2 (en) | 2003-03-13 |
US20080067553A1 (en) | 2008-03-20 |
US7511318B2 (en) | 2009-03-31 |
US20100012927A1 (en) | 2010-01-21 |
US8058089B2 (en) | 2011-11-15 |
KR100945403B1 (ko) | 2010-03-04 |
US20040214367A1 (en) | 2004-10-28 |
WO2003021613A3 (en) | 2003-08-28 |
KR100838206B1 (ko) | 2008-06-13 |
US20040214366A1 (en) | 2004-10-28 |
AU2002353770A1 (en) | 2003-03-18 |
US20090087630A1 (en) | 2009-04-02 |
EP1410429A4 (en) | 2007-06-06 |
TWI246788B (en) | 2006-01-01 |
US7298016B2 (en) | 2007-11-20 |
KR20040035691A (ko) | 2004-04-29 |
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