JP5661992B2 - 積層されたnand型抵抗性メモリセルストリングを含む不揮発性メモリ素子及びその製造方法 - Google Patents
積層されたnand型抵抗性メモリセルストリングを含む不揮発性メモリ素子及びその製造方法 Download PDFInfo
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- JP5661992B2 JP5661992B2 JP2008194064A JP2008194064A JP5661992B2 JP 5661992 B2 JP5661992 B2 JP 5661992B2 JP 2008194064 A JP2008194064 A JP 2008194064A JP 2008194064 A JP2008194064 A JP 2008194064A JP 5661992 B2 JP5661992 B2 JP 5661992B2
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- H10B61/20—Magnetic memory devices, e.g. magnetoresistive RAM [MRAM] devices comprising components having three or more electrodes, e.g. transistors
- H10B61/22—Magnetic memory devices, e.g. magnetoresistive RAM [MRAM] devices comprising components having three or more electrodes, e.g. transistors of the field-effect transistor [FET] type
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- H10B63/30—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices comprising selection components having three or more electrodes, e.g. transistors
- H10B63/34—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices comprising selection components having three or more electrodes, e.g. transistors of the vertical channel field-effect transistor type
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- H10B63/80—Arrangements comprising multiple bistable or multi-stable switching components of the same type on a plane parallel to the substrate, e.g. cross-point arrays
- H10B63/84—Arrangements comprising multiple bistable or multi-stable switching components of the same type on a plane parallel to the substrate, e.g. cross-point arrays arranged in a direction perpendicular to the substrate, e.g. 3D cell arrays
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- H10N70/882—Compounds of sulfur, selenium or tellurium, e.g. chalcogenides
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- H10N70/801—Constructional details of multistable switching devices
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- H10N70/883—Oxides or nitrides
- H10N70/8836—Complex metal oxides, e.g. perovskites, spinels
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- G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
- G11C13/0002—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using resistive RAM [RRAM] elements
- G11C13/0004—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using resistive RAM [RRAM] elements comprising amorphous/crystalline phase transition cells
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- G11C—STATIC STORES
- G11C2213/00—Indexing scheme relating to G11C13/00 for features not covered by this group
- G11C2213/30—Resistive cell, memory material aspects
- G11C2213/31—Material having complex metal oxide, e.g. perovskite structure
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- G11C—STATIC STORES
- G11C2213/00—Indexing scheme relating to G11C13/00 for features not covered by this group
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- G11C2213/32—Material having simple binary metal oxide structure
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- G11C2213/00—Indexing scheme relating to G11C13/00 for features not covered by this group
- G11C2213/70—Resistive array aspects
- G11C2213/71—Three dimensional array
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- G11C2213/00—Indexing scheme relating to G11C13/00 for features not covered by this group
- G11C2213/70—Resistive array aspects
- G11C2213/75—Array having a NAND structure comprising, for example, memory cells in series or memory elements in series, a memory element being a memory cell in parallel with an access transistor
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- H10N70/8413—Electrodes adapted for resistive heating
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Description
3 素子分離層
3a 活性領域
7a、7b メインゲート電極
9s メインソース
9d メインドレイン
11 下部絶縁層
11s ソースコンタクトホール
11d ドレインコンタクトホール
13s 共通ソースライン
13d ドレインパッド
15 第1絶縁層
17b 第1ボディパターン
17s 第1ソース
17c 第1チャネル
17d 第1ドレイン
23 第1ゲート電極
27 第1下部電極
29 第1相変化物質パターン
29v 第1相変化領域
31 第1上部電極
33 第2絶縁層
35b 第2ボディパターン
35s 第2ソース
35c 第2チャネル
35d 第2ドレイン
39 第2下部電極
41 第2相変化物質パターン
43 第2上部電極
45 第3絶縁層
47b 第3ボディパターン
47s 第3ソース
47c 第3チャネル
47d 第3ドレイン
51 第3下部電極
53 第3相変化物質パターン
55 第3上部電極
57 上部絶縁層
59 ビットラインコンタクトプラグ
61 ビットライン
Claims (12)
- 基板と、
前記基板上の絶縁層と、
前記絶縁層内に積層され、直列接続された複数個の抵抗性メモリセルと、
前記直列接続された複数個の抵抗性メモリセルのうちの第1番目の抵抗性メモリセルが前記絶縁層内に形成され、第2番目の抵抗性メモリセルが前記第1番目の抵抗性メモリセル上に形成されてNAND型抵抗性メモリセルストリングを定義し、
前記絶縁層上に形成され、前記複数個の抵抗性メモリセルの最後の一つと電気的に接続したビットラインと、を含み、
前記第1番目及び第2番目の抵抗性メモリセルが、
前記絶縁層内に積層されたソース領域、チャネル領域及びドレイン領域を含むボディパターンと、前記ボディパターンの側壁上に形成されたゲート電極を含むスイッチング素子と、
前記スイッチング素子と並列に接続されたデータ保存要素と、を含み、
前記データ保存要素は、
前記スイッチング素子の前記ボディパターンと離隔された下部電極と、
前記下部電極上の可変抵抗体と、
前記可変抵抗体上の上部電極と、を含み、
前記第1番目の抵抗性メモリセルの上部電極は、前記第2番目の抵抗性メモリセルの下部電極と前記第2番目の抵抗性メモリセルのボディパターンに接して形成されている
ことを特徴とする不揮発性メモリ素子。 - 前記複数個の抵抗性メモリセルのうち最後の抵抗性メモリセルが、
前記絶縁層上に積層されたソース領域、チャネル領域及びドレイン領域を含むボディパターンと、前記ボディパターンの側壁上に形成されたゲート電極を含むスイッチング素子と、
前記スイッチング素子と並列に接続されたデータ保存要素と、を含み、
前記データ保存要素は、
前記スイッチング素子の前記ボディパターンと離隔された下部電極と、
前記下部電極上の可変抵抗体と、
前記可変抵抗体上の上部電極と、を含み、
前記最後の抵抗性メモリセルの上部電極上に形成されたビットラインコンタクトプラグをさらに含み、
前記ビットラインは前記ビットラインコンタクトプラグにより前記複数個の抵抗性メモリセルの最後の抵抗性メモリセルの上部電極と直接接続する
ことを特徴とする請求項1に記載の不揮発性メモリ素子。 - 前記スイッチング素子のゲート電極は前記絶縁層内に前記ビットラインと直交して延長されたワードラインを含む
ことを特徴とする請求項1に記載の不揮発性メモリ素子。 - 前記可変抵抗体は、前記下部電極を介して加えられる熱によって非晶質状態と結晶質状態との間を変化する相変化物質層を含む
ことを特徴とする請求項1に記載の不揮発性メモリ素子。 - 前記基板上のメインスイッチング素子をさらに含み、前記メインスイッチング素子は前記複数個の抵抗性メモリセルの第1番目の抵抗性メモリセルと電気的に接続する
ことを特徴とする請求項1に記載の不揮発性メモリ素子。 - 前記メインスイッチング素子は、
前記基板内のメインソース領域及びメインドレイン領域と、
前記メインソース領域と前記メインドレイン領域との間において前記基板上に形成されたメインゲート電極と、を含み、
前記メインドレイン領域は前記複数個の抵抗性メモリセルのうち第1番目の抵抗性メモリセルの前記下部電極及び前記ボディパターンと電気的に接続された
ことを特徴とする請求項5に記載の不揮発性メモリ素子。 - 前記スイッチング素子の前記ゲート電極は、前記ボディパターンに対向する側壁上に形成されている
ことを特徴とする請求項1に記載の不揮発性メモリ素子。 - 前記可変抵抗体と前記下部電極は、前記絶縁層内のコンタクトホール内に限定されて形成された
ことを特徴とする請求項7に記載の不揮発性メモリ素子。 - 前記コンタクトホールと前記可変抵抗体の側壁間に形成された絶縁性スペーサをさらに含む
ことを特徴とする請求項8に記載の不揮発性メモリ素子。 - 前記複数個の抵抗性メモリセルの前記第1番目の抵抗性メモリセルの上部電極は、前記可変抵抗体及び前記複数個の抵抗性メモリセルの第1番目の抵抗性メモリセルのドレイン領域と、前記複数個の抵抗性メモリセルの前記第2番目の抵抗性メモリセルのソース領域と電気的に接続された
ことを特徴とする請求項8に記載の不揮発性メモリ素子。 - 前記可変抵抗体はプラセオジムカルシウムマンガン酸化層(PCMO層)または遷移金属酸化層のうち一つを含む
ことを特徴とする請求項10に記載の不揮発性メモリ素子。 - 前記可変抵抗体は、順に積層された固定層、トンネリング絶縁層及び自由層を含む磁気トンネル接合を含む
ことを特徴とする請求項10に記載の不揮発性メモリ素子。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2007-0075044 | 2007-07-26 | ||
| KR1020070075044A KR101258268B1 (ko) | 2007-07-26 | 2007-07-26 | 비휘발성 메모리 소자의 낸드형 저항성 메모리 셀 스트링들및 그 제조방법들 |
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| Publication Number | Publication Date |
|---|---|
| JP2009033177A JP2009033177A (ja) | 2009-02-12 |
| JP2009033177A5 JP2009033177A5 (ja) | 2011-08-25 |
| JP5661992B2 true JP5661992B2 (ja) | 2015-01-28 |
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| JP2008194064A Active JP5661992B2 (ja) | 2007-07-26 | 2008-07-28 | 積層されたnand型抵抗性メモリセルストリングを含む不揮発性メモリ素子及びその製造方法 |
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| Country | Link |
|---|---|
| US (2) | US7843718B2 (ja) |
| JP (1) | JP5661992B2 (ja) |
| KR (1) | KR101258268B1 (ja) |
| CN (1) | CN101354917B (ja) |
| DE (1) | DE102008034003B4 (ja) |
| TW (1) | TWI517359B (ja) |
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