JP2020188281A - メモリデバイス及びそれを形成する方法 - Google Patents
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Abstract
Description
本願は、「CONDUCTIVE STRUCTURES, SYSTEMS AND DEVICES INCLUDING CONDUCTIVE STRUCTURES AND RELATED METHODS」と題して2016年3月11日に出願された米国特許出願第15/068,329号に基づく出願日の利益を請求する。
本開示の実施形態は、導電性構造(例えば、細長い階段状導電性構造)であって導電性構造の少なくとも一部を通って延びる複数の接点(コンタクト)を有するもの、このような導電性構造を含む装置、このような導電性構造を含むシステム、このような導電性構造を製造する方法、および細長い階段状導電性構造のための電気接続を形成する方法に関する。
例えば、金属材料(例えば、W、Ni、窒化タンタル(TaN)、Pt、窒化タングステン(WN)、Au、窒化チタン(TiN)、または窒化チタンアルミニウム(TiAlN))、ポリシリコン、他の導電性材料またはこれらの組み合わせの材料から作られ得る。
いくつかの実施形態においては、内側スタックスロット要素238は、階段状構造206、208、210のサブブロック(例えば、副段、副階層、サブプレート)を画定するよう機能してもよい。
101 制御装置
102 半導体デバイス
103 導電性材料
104 基板
105 絶縁性材料
106、107、108、109、110、111 階段状構造
112 ランディング
114、116、118、120、122 段(ステップ)
126 コンタクトホール
128 導電性接点(導電性コンタクト)
130 制御部
132 アクセス線
136 選択ゲート
200 導電性構造
202 半導体デバイス
206、207、208、209、210 211 階段状構造
212 ランディング
238、240 スタックスロット要素
300 材料の積層
302 基板
304 絶縁性材料
306 犠牲材料
308 スロット
310 導電性材料
312 スロット
314 絶縁性材料
Claims (20)
- 3次元(3D)不揮発性メモリデバイス(NAND)であって、
前記メモリデバイスに沿って配置された複数の階段状構造であって、各階段状構造は少なくとも2つの導電性ステップを含み、前記少なくとも2つの導電性ステップのうちの各導電性ステップは、絶縁性材料によって、前記少なくとも2つの導電性ステップのうちの隣接する導電性ステップから少なくとも部分的に分離されている、複数の階段状構造と、
前記メモリデバイスを通って延びる少なくとも1つのビアを含む少なくとも1つのランディングであって、前記少なくとも1つのランディングは、前記複数の階段状構造のうちの第1の階段状構造と前記複数の階段状構造のうちの第2の階段状構造との間に配置され、且つ、前記第1の階段状構造と前記第2の階段状構造とを分離し、前記第1の階段状構造と前記第2の階段状構造の各々は、前記少なくとも1つのランディングの互いに反対側で前記少なくとも1つのランディングに隣接している、少なくとも1つのランディングと、
複数のアクセス線であって、各アクセス線が、前記階段状構造の前記少なくとも2つの導電性ステップのうちの1つの導電性ステップの導電性部分から前記少なくとも1つのビアまで延びている、複数のアクセス線と、
前記階段状構造又は前記少なくとも1つのランディングのうちの少なくとも一方に近接して配置された少なくとも1つの制御部であって、前記少なくとも1つのビアに動作可能に結合された少なくとも1つの制御部と、
を備えるメモリデバイス。 - 前記少なくとも1つの制御部は、ストリングドライバ回路、パスゲート、ゲートを選択するための回路、前記アクセス線を選択するための回路、信号を増幅するための回路、又は信号を検知するための回路、のうちの少なくとも1つを含む、請求項1に記載のメモリデバイス。
- 前記少なくとも1つの制御部は、前記導電性ステップのうちの所望の1つを選択するための、前記アクセス線に電気的に結合されたパスゲートを含む、請求項1に記載のメモリデバイス。
- 前記複数の階段状構造のうちの少なくとも幾つかはワード線プレート構造を含む、請求項1に記載のメモリデバイス。
- 前記ワード線プレート構造はワード線チャージポンプに結合されている、請求項4に記載のメモリデバイス。
- 前記ワード線プレート構造は、タングステンを含有する材料を含む、請求項4に記載のメモリデバイス。
- 前記ワード線プレート構造に電気的に接続されたワード線ドライバを更に備える、請求項4に記載のメモリデバイス。
- 前記複数の階段状構造のうちの1つの階段状構造はドレイン選択ゲート(SGD)構造を含む、請求項1に記載のメモリデバイス。
- 各階段状構造の前記少なくとも2つの導電性ステップは金属材料を含む、請求項1に記載のメモリデバイス。
- 前記少なくとも1つのビアは複数のビアを含み、各アクセス線が、前記階段状構造の少なくとも2つの導電性ステップのうちの1つの導電性ステップの導電性部分から、前記複数のビアのうちの1つのビアまで延びている、請求項1に記載のメモリデバイス。
- 前記複数の階段状構造のうちの少なくとも1つを通って延びる半導体ピラーを更に備える、請求項1に記載のメモリデバイス。
- メモリデバイスであって、
前記メモリデバイスに沿って配置された複数の階層状構造であって、各階層状構造が、導電性部分を有する少なくとも2つの階層を含み、前記少なくとも2つの階層の各導電性部分が、絶縁性材料によって、前記少なくとも2つの階層の隣接する導電性部分から少なくとも部分的に分離されている、複数の階層状構造と、
前記メモリデバイスを通って延びるビアを含むランディングであって、前記複数の階層状構造のうちの第1の階層状構造と、前記複数の階層状構造のうちの前記第1の階層状構造に隣接して配置された第2の階層状構造との間に配置されたランディングと、
前記ランディングに近接して配置され、且つ、前記ランディング内の前記ビアのうちの少なくとも1つに結合された少なくとも1つの制御部と、
を備えるメモリデバイス。 - 前記階層状構造を通って延び、且つ、前記導電性部分に電子的に結合された半導体ピラーを更に備える、請求項12に記載のメモリデバイス。
- 前記少なくとも2つの階層の前記導電性部分は、それぞれ、ワード線プレートを含む、請求項13に記載のメモリデバイス。
- 前記ワード線プレートの各々はタングステンを含む、請求項14に記載のメモリデバイス。
- 前記少なくとも1つの制御部はワード線ドライバを含む、請求項15に記載のメモリデバイス。
- 前記階層状構造に沿って延びるスタックスロット要素を更に備える、請求項12に記載のメモリデバイス。
- 前記スタックスロット要素は、置換ゲート工程において堆積された導電性材料上に配置された絶縁性材料を含む、請求項17に記載のメモリデバイス。
- メモリデバイスであって、
複数のピラーの状態に配列されたメモリセルのアレイと、
前記アレイのメモリセルと電気的に通じているワード線プレートを含む複数の階段状構造と、
前記アレイのメモリセルを選択するための少なくとも1つの制御デバイスと、
ビアを含む少なくとも1つのランディングであって、前記ビアは、前記少なくとも1つのランディングを通って前記少なくとも1つの制御デバイスまで延びており、前記少なくとも1つのランディングは、前記複数の階段状構造のうちの第1の階段状構造と、前記複数の階段状構造のうちの第2の階段状構造との間に配置されている、少なくとも1つのランディングと、
前記階段状構造のワード線プレートと前記ビアの第1の端部との間に結合されたアクセス線であって、前記ビアの第2の端部が前記少なくとも1つの制御デバイスに電気的に結合されている、アクセス線と、
を備えるメモリデバイス。 - 3次元(3D)不揮発性メモリデバイス(NAND)を形成する方法であって、
2つの階段状構造の間に画定された前記メモリデバイスのランディングにおける材料の積層を通る開口を形成することであって、前記2つの階段状構造は、半導体ピラーの一方の側に配置され、且つ、前記半導体ピラーと電気的に通じている、ことと、
前記ランディングにおける前記材料の積層内の前記開口中にコンタクトを画定することと、
前記階段状構造の少なくとも1つのステップの導電性部分を、前記ランディングにおける前記材料の積層内の前記コンタクトのうちの少なくとも1つのコンタクトを介して制御部に電気的に結合することと、
を含む方法。
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