JP7250141B2 - マルチスタック3次元メモリデバイスおよびそれらを形成するための方法 - Google Patents
マルチスタック3次元メモリデバイスおよびそれらを形成するための方法 Download PDFInfo
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- JP7250141B2 JP7250141B2 JP2021535859A JP2021535859A JP7250141B2 JP 7250141 B2 JP7250141 B2 JP 7250141B2 JP 2021535859 A JP2021535859 A JP 2021535859A JP 2021535859 A JP2021535859 A JP 2021535859A JP 7250141 B2 JP7250141 B2 JP 7250141B2
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- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W80/00—Direct bonding of chips, wafers or substrates
- H10W80/701—Direct bonding of chips, wafers or substrates characterised by the pads after the direct bonding
- H10W80/743—Direct bonding of chips, wafers or substrates characterised by the pads after the direct bonding having disposition changed during the connecting
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- H10W90/732—Package configurations characterised by the relative positions of pads or connectors relative to package parts of die-attach connectors between stacked chips
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Description
本出願は、2018年12月18日に出願された中国特許出願第201811547690.7号の優先権を主張し、その全体が参照により本明細書に組み込まれる。
102 基板
103 メモリアレイデバイス構造
104 周辺デバイス層
105 単結晶シリコン層
106 トランジスタ
107 メモリスタック
108 周辺相互接続層
109 チャネル構造
110 第1のメモリアレイデバイス構造
111 アレイ相互接続層
112 第2のメモリアレイデバイス構造
113 ビットライン
114 第3のメモリアレイデバイス構造
115 周辺デバイス層
116 第1のボンディング界面
117 トランジスタ
118 第1の単結晶シリコン層
119 ビアコンタクト
120 第1のメモリスタック
122 第1のチャネル構造
123 第1のボンディング界面
124 メモリ膜
125 第2のボンディング界面
126 半導体チャネル
128 上側プラグ
130 下側プラグ
132 スリット構造
134 アレイ貫通コンタクト(TAC)
136 ビットラインコンタクト
138 ワードラインコンタクト
140 第1のアレイ相互接続層
142 第1のビットライン
144 パッシベーション層
145 シリコン貫通ビア(TSV)
146 第2のボンディング界面
148 第2の単結晶シリコン層
150 第2のメモリスタック
152 第2のチャネル構造
154 下側プラグ
156 第2のアレイ相互接続層
158 第2のビットライン
160 シリコン貫通ビア(TSV)
162 第3のボンディング界面
164 第3の単結晶シリコン層
166 第3のメモリスタック
168 第3のチャネル構造
170 下側プラグ
172 第3のアレイ相互接続層
174 第3のビットライン
175 シリコン貫通ビア(TSV)
176 第1のメモリアレイデバイス構造
178 第1のアレイ相互接続層
180 第1のビットライン
182 第1のボンディング界面
184 第2のメモリアレイデバイス構造
188 第2のアレイ相互接続層
190 第2のビットライン
191 第2のボンディング界面
192 第3のメモリアレイデバイス構造
193 第3のアレイ相互接続層
194 第3のビットライン
195 第3のボンディング界面
196 単結晶シリコン層
197 周辺デバイス層
198 周辺相互接続層
200 マルチスタック3Dメモリデバイス
202 基板
210 第1のメモリスタック
212 第1のチャネル構造
214 メモリ膜
216 半導体チャネル
218 上側プラグ
220 下側プラグ
222 スリット構造
224 アレイ貫通コンタクト(TAC)
226 ワードラインコンタクト
228 ビットラインコンタクト
230 第1のボンディング界面
232 第1のアレイ相互接続層
234 第1のビットライン
236 第1の単結晶シリコン層
238 第2のメモリスタック
240 第2のチャネル構造
242 下側プラグ
246 スリット構造
248 アレイ貫通コンタクト(TAC)
250 第2のボンディング界面
252 第2のアレイ相互接続層
254 第2のビットライン
256 第2の単結晶シリコン層
300 マルチデッキ3Dメモリデバイス
302 基板
304 第1のメモリデッキ
306 第2のメモリデッキ
308 第3のメモリデッキ
310 第1のチャネル構造
312 メモリ膜
314 半導体チャネル
316 上側プラグ
318 下側プラグ
320 第1のデッキ間プラグ
322 誘電体
324 第1のボンディング界面
326 第2のチャネル構造
328 メモリ膜
330 半導体チャネル
332 上側プラグ
334 第2のデッキ間プラグ
336 誘電体
338 第2のボンディング界面
340 第3のチャネル構造
342 メモリ膜
344 半導体チャネル
346 上側プラグ
348 スリット構造
350 アレイ貫通コンタクト(TAC)
352 ビットラインコンタクト
354 ワードラインコンタクト
356 アレイ相互接続層
358 ビットライン
360 シリコン貫通ビア(TSV)
402 第1のシリコン基板
404 第1の誘電体デッキ
406 犠牲層
408 第2の誘電体層
410 第1のチャネル構造
412 メモリ膜
414 半導体チャネル
416 上側プラグ
418 下側プラグ
420 第2のシリコン基板
422 第1の単結晶シリコン層
424 不均一界面
426 第1のボンディング界面
428 第1のデッキ間プラグ
430 誘電体
432 第2の誘電体デッキ
434 犠牲層
436 誘電体層
438 第2のチャネル構造
440 メモリ膜
442 半導体チャネル
444 上側プラグ
446 スリット構造
448 第1のメモリデッキ
449 導体層
450 第2のメモリデッキ
452 アレイ貫通コンタクト(TAC)
454 アレイ相互接続層
502 第1のシリコン基板
504 周辺デバイス層
506 トランジスタ
508 周辺相互接続層
510 第2のシリコン基板
511 第1のボンディング界面
512 第1の単結晶シリコン層
513 不均一界面
514 第1のメモリスタック
516 第1のチャネル構造
518 メモリ膜
520 半導体チャネル
522 上側プラグ
524 下側プラグ
526 スリット構造
528 アレイ貫通コンタクト(TAC)
532 第2の単結晶シリコン層
533 不均一界面
534 アレイ相互接続層
536 ビットライン
538 第2のボンディング界面
542 メモリスタック
544 チャネル構造
545 下側プラグ
546 スリット構造
548 アレイ貫通コンタクト(TAC)
552 第3のボンディング界面
554 アレイ相互接続層
556 ビットライン
558 第3の単結晶シリコン層
602 第1のシリコン基板
604 周辺デバイス層
606 周辺相互接続層
608 第1のボンディング界面
610 第1の単結晶シリコン層
612 メモリスタック
614 チャネル構造
616 アレイ相互接続層
618 ビットライン
619 パッシベーション層
620 第2のボンディング界面
622 第2のシリコン基板
624 第2の単結晶シリコン層
626 メモリスタック
628 アレイ相互接続層
630 ビットライン
632 チャネル構造
Claims (17)
- 3次元(3D)メモリデバイスであって、
基板と、
前記基板の上方の第1の単結晶シリコン層と、
前記第1の単結晶シリコン層の上方の、第1の複数の交互配置された導体層および誘電体層を備える第1のメモリスタックと、
前記第1のメモリスタックを通って垂直に延在する第1のチャネル構造であって、前記第1の単結晶シリコン層の中まで延在し、単結晶シリコンを備える、第1の下側プラグを備える、第1のチャネル構造と、
前記第1のメモリスタックの上方の、前記第1のチャネル構造に電気的に接続された第1のビットラインを備える第1の相互接続層と
を備え、
前記基板と前記第1の単結晶シリコン層との間で垂直な、前記第1のビットラインに電気的に接続された周辺デバイス層をさらに備える3次元(3D)メモリデバイス。 - 前記第1の単結晶シリコン層の厚さが、約1μmと約100μmとの間にある、請求項1に記載の3Dメモリデバイス。
- 前記第1の単結晶シリコン層が、前記第1のメモリスタックの少なくとも幅に沿って横方向に延在する、請求項1に記載の3Dメモリデバイス。
- 前記基板と前記第1の単結晶シリコン層との間の第1のボンディング界面をさらに備える、請求項1に記載の3Dメモリデバイス。
- 前記第1のチャネル構造が、ポリシリコンを備える第1の上側プラグ、ならびに前記第1のチャネル構造の側壁に沿った第1のメモリ膜および第1の半導体チャネルを備え、
前記第1の半導体チャネルが、それぞれ、前記第1の上側プラグと前記第1の下側プラグとの間にあり、前記第1の上側プラグおよび前記第1の下側プラグと接触している、
請求項1に記載の3Dメモリデバイス。 - 前記第1のメモリスタックを通って前記第1の単結晶シリコン層まで垂直に延在するスリット構造をさらに備える、請求項1に記載の3Dメモリデバイス。
- 前記第1のメモリスタックを通って垂直に延在し、前記周辺デバイス層に電気的に接続された、アレイ貫通コンタクト(TAC)をさらに備える、請求項1に記載の3Dメモリデバイス。
- 前記第1の相互接続層の上方の、前記第1のビットラインに電気的に接続された周辺デバイス層をさらに備える、請求項1に記載の3Dメモリデバイス。
- 前記第1の単結晶シリコン層の上かつ前記第1のメモリスタックの横の、前記第1のビットラインに電気的に接続された周辺デバイス層をさらに備える、請求項1に記載の3Dメモリデバイス。
- 前記第1の相互接続層の上方の第2の単結晶シリコン層と、
前記第2の単結晶シリコン層の上方の、第2の複数の交互配置された導体層および誘電体層を備える第2のメモリスタックと、
前記第2のメモリスタックを通って垂直に延在する第2のチャネル構造であって、前記第2の単結晶シリコン層の中まで延在し、単結晶シリコンを備える、第2の下側プラグを備える、第2のチャネル構造と、
前記第2のメモリスタックの上方の、前記第2のチャネル構造に電気的に接続された第2のビットラインを備える第2の相互接続層と
をさらに備える、請求項1に記載の3Dメモリデバイス。 - 前記第1の相互接続層と前記第2の単結晶シリコン層との間の第2のボンディング界面をさらに備える、請求項10に記載の3Dメモリデバイス。
- 前記第2の単結晶シリコン層が、前記第1のビットラインの直上に配設される、請求項10に記載の3Dメモリデバイス。
- 前記第2の単結晶シリコン層が、前記第1の相互接続層と前記第2のメモリスタックとの間にウェルを備える、請求項12に記載の3Dメモリデバイス。
- 3次元(3D)メモリデバイスを形成するための方法であって、
第1の基板の上に第1の半導体デバイスを形成するステップと、
第1の単結晶シリコン層を第2の基板から前記第1の基板の上の前記第1の半導体デバイスの上に転写するステップと、
交互配置された犠牲層および誘電体層を備える誘電体スタックを前記第1の単結晶シリコン層の上に形成するステップと、
前記誘電体スタックを通って垂直に延在するチャネル構造を形成するステップであって、前記チャネル構造が、前記第1の単結晶シリコン層の中まで延在し、単結晶シリコンを備える、下側プラグを備える、ステップと、
前記誘電体スタックの前記犠牲層を導体層と置き換えることによって、交互配置された前記導体層および前記誘電体層を備えるメモリスタックを形成するステップと、
前記メモリスタックの上方の、前記チャネル構造に電気的に接続されたビットラインを備える相互接続層を形成するステップと
を備える方法。 - 前記第1の単結晶シリコン層を前記第2の基板から転写するステップが、
前記第2の基板に不均一界面を形成するステップと、
前記第2の基板および前記第1の基板を、向かい合わせてボンディングするステップと、
前記第1の単結晶シリコン層を、前記第1の単結晶シリコン層を残すように前記第2の基板の前記不均一界面に沿って前記第2の基板から分割するステップとを備える、
請求項14に記載の方法。 - 前記ボンディングがシリコン誘電体ボンディングを備える、請求項15に記載の方法。
- 第2の単結晶シリコン層を前記第2の基板から前記第1の基板の上方の前記相互接続層の上に転写するステップと、
第2の半導体デバイスを前記第2の単結晶シリコン層の上方に形成するステップと
をさらに備える、請求項14に記載の方法。
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