JP2019080062A - トランジスタ、半導体素子及びメモリ素子の形成方法 - Google Patents
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Abstract
【解決手段】複数のソース/ドレイン領域及びチャンネル領域を有し、チャンネル領域がこれらのソース/ドレイン領域の間に位置する基板と、ゲートと、ゲートと基板との間に位置するゲート誘電体層と、を含み、また、上面図において、基板がゲート誘電体層から離れる方向へ次第に小さくなるトランジスタ。上記の構造により、トランジスタの構造密度は改善される。
【選択図】図1B
Description
(発明の効果)
10、202 基板
20 誘電体層
100 メモリユニットアレイ
120 メモリユニットストリング
140 メモリユニットブロック
200 不揮発性メモリ素子
220、350 垂直チャンネル
222 ゲート誘電体層
226 ライナー層
228、230 隔離層
232 埋め込み部
234 接続部
236 凸面
238 凹面
240、242 側
310 アース線
319 第1のポリシリコン層
320 第2のポリシリコン層
322 第1のゲート誘電体層
324 グラウンド選択ライン
326 第1のライナー層
328、330 シャロートレンチ隔離層
332、432、532 窒化シリコン層
334、434、534 第3のポリシリコン層
335 ハードシールド層
336 第2のライナー層
338 第1のディープトレンチ隔離層
346 第2のディープトレンチ隔離層
340、440、540 第4のポリシリコン層
342 第2のゲート誘電体層
344、444、544 導電層
345 キャラクターライン
351 側壁
351p ピーク
351t ボトム
353 基板注入領域
355 ソース/ドレイン領域
357 チャンネル領域
360 ファン構造電界効果トランジスタユニット
370 第1のユニット
380 第2のユニット
602、604 隔離層
T0、T1、T2 トレンチ
R1 ノッチ
S/D ソース/ドレイン領域
C チャンネル領域
G ゲート
M1〜Mn メモリユニット
WL、W1〜Wn、w0〜w5 キャラクターライン
BL、B1〜Bm、b1〜B12 ビットライン
SGL、s1〜s4 選択ゲート線
CR ユニット領域
M1、M2 金属層
PR1、PR2 周辺領域
MCS メモリユニットストリング
SST ストリング選択トランジスタ
GST グラウンド選択トランジスタ
CSL 共通ソースライン
SSL ストリング選択ライン
GSL グラウンド選択ライン
CCV カスケードコンタクトビア
Claims (20)
- 複数のソース/ドレイン領域及びチャンネル領域を有し、前記チャンネル領域が前記ソース/ドレイン領域の間に位置する基板と、
ゲートと、
前記ゲートと前記基板との間に位置するゲート誘電体層と、
を含み、
また、上面図において、前記基板が前記ゲート誘電体層から離れる方向へ次第に小さくなる、トランジスタ。 - 前記ゲート誘電体層、前記基板及び前記ゲートは、上面図において半楕円形の輪郭を形成する、請求項1に記載のトランジスタ。
- 前記ゲートは、前記ゲート誘電体層内に嵌設される、請求項1又は2に記載のトランジスタ。
- 前記ゲート誘電体層は、前記基板内に嵌設される、請求項1〜3の何れか1項に記載のトランジスタ。
- 前記ゲートは、前記ゲート誘電体層と接触する凸面を含む、請求項1〜4の何れか1項に記載のトランジスタ。
- 前記基板は、前記ゲート誘電体層と接触する凹面を含む、請求項1〜5の何れか1項に記載のトランジスタ。
- 前記ゲート及び前記基板は、それぞれ凸面及び凹面を含み、且つ前記ゲート誘電体層が前記凸面及び前記凹面の間に位置する、請求項1〜4の何れか1項に記載のトランジスタ。
- 第1の隔離層を更に含み、前記基板が前記第1の隔離層内に嵌設され、前記第1の隔離層が上面図において蛇行状形状を有する、請求項1〜7の何れか1項に記載のトランジスタ。
- 第2の隔離層を更に含み、前記ゲートが前記第2の隔離層及び前記ゲート誘電体層の間に位置し、且つ上面図において、前記第2の隔離層が前記第1の隔離層と異なる形を有する、請求項8に記載のトランジスタ。
- 前記第2の隔離層は、上面図においてストリップ形状を有する、請求項9に記載のトランジスタ。
- 複数の第1の側と複数の第2の側を有し、且つ前記第1の側及び前記第2の側が上面図において非対称となる第1の隔離層と、
それぞれ前記第1の隔離層における非対称となる前記第1の側及び前記第2の側に嵌設され、各々が水平に順に配列されるゲート、ゲート誘電体層及びドープトシリコン基板を含む複数のトランジスタと、
を備える、半導体素子。 - 前記第1の隔離層は、上面図において蛇行状形状を有する、請求項11に記載の半導体素子。
- 複数の第2の隔離層を更に含み、上面図において、前記第1の隔離層が前記第2の隔離層の間に位置し、且つ前記第2の隔離層が上面図において前記第1の隔離層と異なる形を有する、請求項11又は12に記載の半導体素子。
- 前記第2の隔離層の各々は、上面図においてストリップ形状を有する、請求項13に記載の半導体素子。
- 前記トランジスタの各々は、上面図において半楕円形状を有する、請求項11〜14の何れか1項に記載の半導体素子。
- 前記第1の隔離層の前記第1の側に複数の第1のノッチを有し、前記トランジスタの第1組が前記第1のノッチに位置し、前記第1の隔離層の前記第2の側に複数の第2のノッチを有し、前記トランジスタの第2組が前記第2のノッチに位置し、且つ上面図において、前記第1のノッチと前記第2のノッチが非対称となるように配列される、請求項11〜15の何れか1項に記載の半導体素子。
- 前記トランジスタの各々の前記ドープトシリコン基板は、複数のソース/ドレイン領域を含み且つ垂直に配列される、請求項11〜16の何れか1項に記載の半導体素子。
- 複数の窒化シリコン層及び複数のポリシリコン層が交互に配置されたスタックを形成することと、
前記窒化シリコン層及び前記ポリシリコン層の前記スタックに位置する蛇行状トレンチをエッチングすることと、
前記蛇行状トレンチに第1の隔離層を形成することと、
前記窒化シリコン層の1層を取り除いて、前記ポリシリコン層の隣接する両層にノッチを形成することと、
前記ノッチに順にドープトポリシリコン層、ゲート誘電体層及び導電層を形成することと、
を含む、メモリ素子の形成方法。 - 前記窒化シリコン層及び前記ポリシリコン層の前記スタックに位置するストリップ形トレンチをエッチングすることと、
前記ドープトシリコン層、前記ゲート誘電体層及び前記導電層を形成した後で、第2の隔離層を前記ストリップ形トレンチに形成することと、
を更に含む、請求項18に記載のメモリ素子の形成方法。 - 上面図において、前記導電層の第1の部分及び前記導電層の第2の部分が前記ドープトシリコン層を囲むように前記導電層が形成され、且つ前記第1の隔離層が前記導電層の前記第1の部分及び前記第2の部分の間に位置する、請求項18又は19に記載のメモリ素子の形成方法。
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| US201762574758P | 2017-10-20 | 2017-10-20 | |
| US62/574,758 | 2017-10-20 | ||
| US16/053,823 | 2018-08-03 | ||
| US16/053,823 US10644024B2 (en) | 2017-10-20 | 2018-08-03 | Transistor, semiconductor device, memory device and fabrication the same |
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| US11018151B2 (en) * | 2018-09-26 | 2021-05-25 | Sandisk Technologies Llc | Three-dimensional flat NAND memory device including wavy word lines and method of making the same |
| US10770472B2 (en) * | 2018-10-31 | 2020-09-08 | Micron Technology, Inc. | Memory arrays, and methods of forming memory arrays |
| US10937798B2 (en) | 2018-11-02 | 2021-03-02 | Micron Technology, Inc. | Memory array and a method used in forming a memory array |
| US11183511B2 (en) * | 2019-01-25 | 2021-11-23 | Macronix International Co., Ltd. | Memory device and manufacturing method for the same |
| TWI737114B (zh) | 2019-02-27 | 2021-08-21 | 王振志 | 電晶體、包含該電晶體之三維記憶體元件及製造該記憶體元件之方法 |
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| TWI713154B (zh) * | 2019-08-14 | 2020-12-11 | 旺宏電子股份有限公司 | 記憶體裝置 |
| TWI713155B (zh) * | 2019-10-23 | 2020-12-11 | 旺宏電子股份有限公司 | 記憶體裝置 |
| US11056504B2 (en) | 2019-10-23 | 2021-07-06 | Macronix International Co., Ltd. | Memory device |
| KR102801636B1 (ko) * | 2019-10-29 | 2025-05-02 | 삼성전자주식회사 | 3차원 반도체 메모리 소자 |
| US11121223B2 (en) * | 2019-11-15 | 2021-09-14 | Micron Technology, Inc. | Control gate structures for field-effect transistors |
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| KR102104568B1 (ko) | 2020-04-27 |
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| US10644024B2 (en) | 2020-05-05 |
| KR102244664B1 (ko) | 2021-04-28 |
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| CN109698200A (zh) | 2019-04-30 |
| CN109698200B (zh) | 2021-02-23 |
| US10886298B2 (en) | 2021-01-05 |
| JP6808701B2 (ja) | 2021-01-06 |
| TW201917829A (zh) | 2019-05-01 |
| KR20190044537A (ko) | 2019-04-30 |
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