JP5252827B2 - 記憶素子 - Google Patents
記憶素子 Download PDFInfo
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- JP5252827B2 JP5252827B2 JP2007108004A JP2007108004A JP5252827B2 JP 5252827 B2 JP5252827 B2 JP 5252827B2 JP 2007108004 A JP2007108004 A JP 2007108004A JP 2007108004 A JP2007108004 A JP 2007108004A JP 5252827 B2 JP5252827 B2 JP 5252827B2
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- Prior art keywords
- layer
- conductive layer
- memory element
- conductive
- transistor
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Description
S.Moller他4名、NATURE、Vol426、p166−p199(2003)
本発明の記憶素子の一例について、図1、図2を用いて説明する。本発明の記憶素子は、一対の導電層間に有機化合物を含む層(以下、有機化合物層ともいう)と、有機化合物層に接する液晶性を示す化合物を含む層(以下、液晶層ともいう)を有する構造とする。
本発明の記憶素子及び当該記憶素子を有する半導体装置、代表的には記憶装置の例について、図3〜図5を用いて説明する。具体的には、パッシブマトリクス型の記憶装置の例について説明する。
本発明の記憶素子及び当該記憶素子を有する半導体装置、代表的には記憶装置の例について、図6〜図9を用いて説明する。具体的には、アクティブマトリクス型の記憶装置の例について説明する。
本実施の形態では、本発明の記憶素子、当該記憶素子を有する半導体装置及びその作製方法、又は当該半導体装置の適用例について、図10〜図16を用いて説明する。
102 第1の導電層
104 液晶層
106 有機化合物層
108 第2の導電層
110 記憶素子
114 液晶層
122 第1の導電層
124 混合物領域
Claims (5)
- 第1の導電層と、
第2の導電層と、
前記第1の導電層と前記第2の導電層とに挟持される液晶性を示す化合物を含む層と、
前記第1の導電層と前記第2の導電層とに挟持され、前記液晶性を示す化合物を含む層に接する有機化合物を含む層と、を有し、
前記第1の導電層及び前記第2の導電層の間に電圧を印加することにより、前記第1の導電層及び前記第2の導電層の間の電気抵抗が変化する記憶素子であって、
前記液晶性を示す化合物を含む層は前記第1の導電層に接して形成されており、少なくとも温度変化によって第1の相から第2の相へ相転移する層であり、
前記第1の導電層及び前記第2の導電層の間に電圧を印加する前には、前記液晶性を示す化合物を含む層は、固体状態であり、
前記第1の導電層及び前記第2の導電層の間に電圧を印加する前には、前記液晶性を示す化合物を含む層及び有機化合物を含む層は、絶縁体であり、
前記第1の導電層及び前記第2の導電層の間に電圧を印加することにより、前記液晶性を示す化合物を含む層と前記第1の導電層とで混合物が形成され、前記混合物は導電性を示すことを特徴とする記憶素子。 - 請求項1において、
前記液晶性を示す化合物を含む層の前記第1の相は固体状態であり、前記第2の相は液晶状態又は液体状態であることを特徴とする記憶素子。 - 請求項1又は請求項2において、
前記第1の導電層及び前記第2の導電層の間に電圧を印加することにより、前記液晶性を示す化合物を含む層は前記第1の相から前記第2の相へ相転移することを特徴とする記憶素子。 - 請求項1乃至3のいずれか一において、
前記第1の導電層及び前記第2の導電層の間に電圧を印加することにより、前記有機化合物を含む層の形状が変化し、前記第1の導電層と前記第2の導電層が短絡することを特徴とする記憶素子。 - 請求項1乃至4のいずれか一において、
前記有機化合物を含む層は、有機樹脂を含む層、正孔輸送性を有する有機化合物を含む層又は電子輸送性を有する有機化合物を含む層であることを特徴とする記憶素子。
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