JP6181196B2 - トランジスタ、メモリセルおよび半導体構造 - Google Patents
トランジスタ、メモリセルおよび半導体構造 Download PDFInfo
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- JP6181196B2 JP6181196B2 JP2015543051A JP2015543051A JP6181196B2 JP 6181196 B2 JP6181196 B2 JP 6181196B2 JP 2015543051 A JP2015543051 A JP 2015543051A JP 2015543051 A JP2015543051 A JP 2015543051A JP 6181196 B2 JP6181196 B2 JP 6181196B2
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Description
Claims (18)
- 半導体ベースと、
前記半導体ベースへと伸びるゲートであって、前記ゲートに隣接する前記ベースの第一領域は、導電性を有するようにドープされたソース領域であり、前記ゲートに隣接し、かつ、前記第一領域から間隔をあけられた前記ベースの第二領域は、導電性を有するようにドープされたドレイン領域である、ゲートと、
前記ソース領域および前記ゲートの間の第一断片と、前記ドレイン領域および前記ゲートの間の第二断片と、前記第一断片および第二断片の間の第三断片と、を含むゲート誘電体と、
を含み、
前記ゲート誘電体の少なくとも一部は強誘電性材料を含み、
前記強誘電性材料は、前記第一断片内にあり、
前記ゲート誘電体の前記第二断片および前記第三断片の全体は、非強誘電性材料からなる、
ことを特徴とする半導体構造。 - 前記強誘電性材料は、前記第一断片の全体を構成する、
ことを特徴とする請求項1に記載の半導体構造。 - 前記第一断片は、前記半導体ベースに直接接する非強誘電性材料をさらに含み、前記強誘電性材料は、前記第一断片の前記非強誘電性材料と前記ゲートとの間に配置される、
ことを特徴とする請求項1に記載の半導体構造。 - 前記第一、第二および第三断片の前記非強誘電性材料は、二酸化シリコンもしくは窒化シリコンから成る、
ことを特徴とする請求項3に記載の半導体構造。 - 前記ソース領域は、前記ソース領域内の比較的浅い位置と比較して、前記ソース領域内の比較的深い位置においてドーパント濃度がより低い、ドーパント勾配を含む、
ことを特徴とする請求項1に記載の半導体構造。 - 前記ドレイン領域は、前記ソース領域の少なくとも一部よりも、より高濃度にドープされる、
ことを特徴とする請求項1に記載の半導体構造。 - 前記ドレイン領域の全体は、前記ソース領域のいかなる部分よりも、より高濃度にドープされる、
ことを特徴とする請求項1に記載の半導体構造。 - 前記ドレイン領域に電気的に結合された電荷格納デバイスをさらに含む、
ことを特徴とする請求項1に記載の半導体構造。 - 前記非強誘電性材料は、前記第一の断片に沿うよりも、前記第二および第三断片に沿ってより厚く、前記ドレイン領域は、前記ソース領域よりもより高濃度にドープされる、
ことを特徴とする請求項3に記載の半導体構造。 - ゲートと、
ソース領域と、
ドレイン領域と、
前記ソースおよびドレイン領域の間のチャネル領域と、
前記ゲートと、前記ソース、ドレインおよびチャネル領域と、の間のゲート誘電体と、を含み、
前記ゲート誘電体は、前記ソース領域と前記ゲートとの間の第一断片と、前記ドレイン領域と前記ゲートとの間の第二断片と、前記第一断片と前記第二断片との間の第三断片と、を含み、
前記第二断片および前記第三断片の全体は非強誘電性材料から成り、前記第一断片は少なくとも強誘電性材料を含む、
ことを特徴とするトランジスタ。 - 前記強誘電性材料は、前記第一断片の全体を構成する、
ことを特徴とする請求項10に記載のトランジスタ。 - 前記第一断片は、半導体ベースに直接接する非強誘電性材料をさらに含み、前記強誘電性材料は、前記第一断片の前記非強誘電性材料と前記ゲートとの間に配置される、
ことを特徴とする請求項10に記載のトランジスタ。 - 前記第一、第二および第三断片の前記非強誘電性材料は、二酸化シリコンもしくは窒化シリコンから成る、
ことを特徴とする請求項12に記載のトランジスタ。 - 前記強誘電性材料は、Hf、Zr、およびTiのうちの一つを含んで構成される酸化物材料である、
ことを特徴とする請求項10に記載のトランジスタ。 - 前記ゲートおよびゲート誘電体は、半導体材料内に埋め込まれ、
前記ソースおよびドレイン領域は、前記半導体材料の導電性を有するようにドープされた領域に対応する、
ことを特徴とする請求項10に記載のトランジスタ。 - ゲートと、
ソース領域と、
ドレイン領域と、
前記ソースおよびドレイン領域の間のチャネル領域と、
前記ゲートと、前記ソース、ドレインおよびチャネル領域と、の間のゲート誘電体と、
を含むトランジスタと、
前記トランジスタの前記ドレイン領域に電気的に結合された電荷格納デバイスと、
を有するメモリセルであって、
前記ゲート誘電体は、前記ソース領域と前記ゲートとの間の第一断片と、前記ドレイン領域と前記ゲートとの間の第二断片と、前記第一断片と前記第二断片との間の第三断片と、を含み、前記第二断片および前記第三断片の全体は非強誘電性材料から成り、前記第一断片は少なくとも強誘電性材料を含む、
ことを特徴とするメモリセル。 - 前記第一断片は、半導体ベースに直接接する非強誘電性材料をさらに含み、前記強誘電性材料は、前記第一断片に位置する非強誘電性材料と前記ゲートとの間に配置される、
ことを特徴とする請求項16に記載のメモリセル。 - 前記電荷格納デバイスはキャパシタである、
ことを特徴とする請求項16に記載のメモリセル。
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US8796751B2 (en) | 2014-08-05 |
US20140138753A1 (en) | 2014-05-22 |
US20140332750A1 (en) | 2014-11-13 |
US20170133478A1 (en) | 2017-05-11 |
CN108054213A (zh) | 2018-05-18 |
CN104798200B (zh) | 2018-02-02 |
EP2923378A1 (en) | 2015-09-30 |
US9882016B2 (en) | 2018-01-30 |
TW201428971A (zh) | 2014-07-16 |
TWI512992B (zh) | 2015-12-11 |
CN108054213B (zh) | 2021-07-09 |
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US20160133717A1 (en) | 2016-05-12 |
EP3651198A1 (en) | 2020-05-13 |
US11594611B2 (en) | 2023-02-28 |
US10943986B2 (en) | 2021-03-09 |
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US9590066B2 (en) | 2017-03-07 |
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