JP2010503194A - 抵抗スイッチングデバイスの製造方法および該方法で得られるデバイス - Google Patents
抵抗スイッチングデバイスの製造方法および該方法で得られるデバイス Download PDFInfo
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Abstract
Description
本発明の一つの実施形態においては、ボトム電極と、トップ電極と、該ボトム電極およびトップ電極と接触した抵抗スイッチング材料の層とを具える抵抗スイッチングデバイスを製造する方法が記載され、この方法は、前記ボトム電極を具える基板を用意するステップと、前記ボトム電極を露出させる開口部を具える誘電体層を設けるステップと、前記開口部内に抵抗層を形成するステップとを具える。
-非特許文献4が、特に金属銅とアセトニトリルに溶解されたTCNQとの反応によるCuTCNQの形成について
-特許文献1が、特にAl2O3層上でのCuとTCNQの熱同時体積によるCuTCNQの成長について、
-非特許文献5が、特に減圧下でのTCNQ蒸気による銅基板の腐食によるCuTCNQの成長について、
-非特許文献6が、Agとアセトニトリルに溶解されたTCNQとの反応による、または蒸気雰囲気内におけるAgとTCNQの合成による、AgTCNQの成長について、
開示している。
(i)所謂「安定」ガラスにおけるスレショルドスイッチング;これは負の差分抵抗および双安定動作を示し、高導電状態を維持するために最小の「保持」電圧を必要とする。代表的な材料は3次元交差結合カルコゲニド合金ガラスである。
(ii)「構造リバーシブルフィルム」におけるメモリスイッチング;これは結晶質の導電パスを構成し得る。典型的な組成は、Ge−Te2元共晶混合物に近いTe81Ge15X4であり、ここでXはV又はVI俗の元素、例えばSbである。後者の材料はスレショルドスイッチングも示し、ガラス状態において高導電状態を開始し、続いてアモルファス相から結晶相への遷移が生じ、高導電状態を安定化する。
-非特許文献4が、特に金属銅とアセトニトリルに溶解されたTCNQとの反応によるCuTCNQの形成について
-特許文献1が、特にAl2O3層上でのCuとTCNQの熱同時体積によるCuTCNQの成長について、
-非特許文献5が、特に減圧下でのTCNQ蒸気による銅基板の腐食によるCuTCNQの成長について、
-非特許文献6が、Agとアセトニトリルに溶解されたTCNQとの反応による、または蒸気雰囲気内におけるAgとTCNQの合成による、AgTCNQの成長について、
開示している。
Claims (24)
- ボトム電極、トップ電極、および前記ボトム電極および前記トップ電極と接触した抵抗スイッチング材料の層を具える抵抗スイッチングデバイスを製造する方法において、該方法は、
前記ボトム電極を具える基板を用意するステップと、
前記ボトム電極を露出させる開口部を具える誘電体層を設けるステップと、
前記開口部内に抵抗層を形成するステップと,
を具えることを特徴とする抵抗スイッチングデバイスの製造方法。 - 前記誘電体層を設けるステップは、誘電体層を堆積し、該誘電体層にトレンチを形成し、該トレンチに前記ボトム電極を露出させる孔を形成することを特徴とする請求項1記載の方法。
- 前記抵抗層を形成するステップは、前記開口部を前記抵抗スイッチング材料で少なくとも部分的に充填し、次に前記少なくとも部分的に充填された開口部内に前記トップ電極を形成することを特徴とする請求項1記載の方法。
- 前記誘電体層を設けるステップおよび前記抵抗層を形成するステップは、前記ボトム電極を露出させる開口部を有する第1誘電体層を形成し、前記開口部内に抵抗層を形成し、更に前記抵抗層を露出させるトレンチを具える第2誘電体層を形成し、前記トレンチ内に前記トップ電極を形成することを特徴とする請求項1記載の方法。
- 前記抵抗層を形成するステップは、前記開口部を前記抵抗スイッチング材料で少なくとも部分的に充填することを特徴とする請求項4記載の方法。
- 前記基板が第1金属パターンを具え、前記ボトム電極が該第1金属パターン内に設けられていることを特徴とする請求項1記載の方法。
- 前記基板が第1金属パターンを具え、前記ボトム電極が該第1金属パターン内に設けられている請求項1記載の方法において、前記トップ電極を第2金属パターン内に形成するステップを更に具えることを特徴とする請求項1記載の方法。
- 前記抵抗スイッチング材料は、電子ドナーおよび電子アクセプタを含む電荷移動錯体であることを特徴とする請求項1に記載の方法。
- 前記抵抗スイッチング材料はパイ電子系を持つ有機化合物であることを特徴とする請求項8記載の方法。
- 前記有機化合物はTCNQまたはTCNQの誘導体により供与されることを特徴とする請求項9記載の方法。
- 前記電子ドナーは前記ボトム電極の金属により供給され、該金属はCu,AgおよびKからなる群から選ばれることを特徴とする請求項10記載の方法。
- 前記抵抗スイッチング材料は二元金属酸化物であることを特徴とする請求項1記載の方法。
- 前記ボトム電極は銅を具え、前記二元金属酸化物は銅金属酸化物であることを特徴とする請求項12記載の方法。
- 前記トップ電極を形成するステップを更に具え、該ステップは金属層を前記基板上に形成し、前記開口部の余分の金属を除去することを特徴とする請求項1記載の方法。
- 前記抵抗スイッチングデバイスは不揮発性メモリデバイスであることを特徴とする請求項1記載の方法。
- ボトム電極と、
トップ電極と、
前記ボトムおよび前記トップ電極と接触した抵抗スイッチング材料の層とを具え、
前記トップ電極および前記抵抗層が誘電体層に形成された開口部に含まれていることを特徴とする抵抗スイッチングデバイス。 - 前記ボトム電極が第1金属パターン内に形成され、
前記トップ電極が第2金属パターン内に形成され、
前記誘電体層が少なくとも第1の層と第2の層を具え、第1の層が前記第1金属パターンと前記第2金属パターンとを分離するとともに、前記第1金属パターンと前記第2金属パターンとの間の接続をもたらす開口部を含み、
前記抵抗層が前記開口部に含まれていることを特徴とする請求項16記載のデバイス。 - 前記抵抗スイッチング材料は、電子ドナーおよび電子アクセプタを含む電荷移動錯体であることを特徴とする請求項16記載のデバイス。
- 前記抵抗スイッチング材料はパイ電子系を持つ有機化合物であることを特徴とする請求項18記載のデバイス。
- 前記有機化合物はTCNQまたはTCNQの誘導体により供与されることを特徴とする請求項19記載のデバイス。
- 前記電子ドナーは前記ボトム電極の金属により供給され、該金属はCu,AgおよびKからなる群から選ばれることを特徴とする請求項20記載のデバイス。
- 前記抵抗スイッチング材料は二元金属酸化物であることを特徴とする請求項16記載のデバイス。
- 前記ボトム電極は銅を具え、前記二元金属酸化物は銅金属酸化物であることを特徴とする請求項22記載のデバイス。
- 前記ボトム電極および前記トップ電極は同じ材料からなることことを特徴とする請求項16記載のデバイス。
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PCT/IB2007/004248 WO2008026081A2 (en) | 2006-08-31 | 2007-08-31 | Method for manufacturing a resistive switching device and devices obtained thereof |
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EP (1) | EP2062306A2 (ja) |
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