JP7547514B2 - 半導体デバイス用パッド構造 - Google Patents
半導体デバイス用パッド構造 Download PDFInfo
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Description
101 CMOSダイ
102 アレイダイ
103 基板
104 基板
105 半導体部
106 絶縁部
111 バルク部
112 酸化シリコン層
113 窒化シリコン層
115 コア領域
116 階段領域
117 絶縁領域
120 金属膜
121 接続構造
122 パッド構造
123 パッド構造
126 チタン層
127 ケイ化チタン層
128 アルミニウム層
131 ボンディング構造
134 ボンディング構造
150 ワード線接続構造
151 ワード線コンタクトプラグ
152 ビア構造
153 金属ワイヤ
162 ビア
163 金属ワイヤ
164 ボンディング構造
170 コンタクト構造
171 コンタクトプラグ
172 ビア構造
173 金属ワイヤ
174 ボンディング構造
175 端部
180 メモリセルストリング
181 チャネル構造
182 ブロッキング絶縁層
183 電荷蓄積層
184 トンネル絶縁層
185 半導体層
186 絶縁層
189 共通ソース層
190 層
194 絶縁層
195 ゲート層
Claims (18)
- 対面接合された第1のダイと第2のダイであって、前記第1のダイは、半導体部内で前記第1のダイの表側に形成された第1のトランジスタと、少なくとも、前記半導体部の外側の絶縁部に配置されたコンタクト構造とを含み、前記第2のダイは、基板と、前記第2のダイの表側に形成された第2のトランジスタとを含む、第1のダイと第2のダイ;
前記第1のダイの裏側に配置されて、前記コンタクト構造と導電結合されている、第1のパッド構造であって、前記コンタクト構造の端部が絶縁部から第1のパッド構造中に突出している、第1のパッド構造;および
前記第1のダイの裏側に配置されて、前記半導体部と導電接続されている、接続構造
を備え、
前記半導体部と前記絶縁部とは、前記第1のダイの主表面に垂直な方向に重なり合っておらず、
前記第1のパッド構造は前記絶縁部の上方にあり、前記接続構造は前記半導体部の上方にある、半導体デバイス。 - 前記接続構造と前記半導体部の間の界面が、前記半導体部の上で実質的に平坦である、請求項1に記載の半導体デバイス。
- 前記半導体部上の前記接続構造の下端面と上端面が、ほぼ同じサイズである、請求項1に記載の半導体デバイス。
- 前記コンタクト構造は、少なくとも、前記第1のパッド構造内の第2の金属材料と異なる第1の金属材料を含む、請求項1に記載の半導体デバイス。
- 前記第1の金属材料はタングステンを含み、前記第2の金属材料はアルミニウムを含む、請求項4に記載の半導体デバイス。
- 前記絶縁部との界面を形成する、前記第1のパッド構造の下端面が、前記コンタクト構造の端部に対応する、凹部を有する、請求項1に記載の半導体デバイス。
- 前記第1のダイは、少なくとも、前記半導体部内に形成されたメモリセルアレイを備え、前記第2のダイは、前記メモリセルアレイのための周辺回路を備える、請求項1に記載の半導体デバイス。
- 前記第1のダイ上の前記コンタクト構造は、ボンディング構造を介して前記第2のダイ上の入/出力回路に電気結合されている、請求項7に記載の半導体デバイス。
- 前記第1のダイは、前記コンタクト構造に電気結合された入/出力回路を備える、請求項1に記載の半導体デバイス。
- 半導体デバイスを製造する方法であって、
第1のダイと第2のダイを対面接合するステップであって、前記第1のダイは、第1の基板、前記第1の基板の表側の半導体部内に形成された第1のトランジスタ、および前記半導体部の外側の絶縁部内に配置されたコンタクト構造を備え、前記第2のダイは、第2の基板の表側に形成された第2のトランジスタを有する、前記第2の基板を備える、ステップと、
前記第1のダイの裏側から前記第1の基板を除去するステップであって、前記第1の基板の除去によって、前記第1のダイの裏側の前記コンタクト構造の端部を露出させる、ステップと、
前記第1のダイの裏側に、前記コンタクト構造と導電接続された第1のパッド構造を形成するステップであって、前記コンタクト構造の端部は、前記絶縁部から前記第1のパッド構造の内側に突出している、ステップと
前記第1のダイの裏側に、前記半導体部と導電接続されている接続構造を形成するステップと、
を含み、
前記半導体部と前記絶縁部とは、前記第1のダイの主表面に垂直な方向に重なり合っておらず、
前記第1のパッド構造は前記絶縁部の上方にあり、前記接続構造は前記半導体部の上方にある、方法。 - 前記第1の基板の除去は、前記第1のダイの裏側から前記半導体部を露出させ、前記方法は、
前記接続構造を形成するための層を堆積させるステップであって、前記半導体部に対する前記層の界面が、前記半導体部の上で実質的に平坦である、ステップを含む、請求項10に記載の方法。 - 前記接続構造を形成するための前記層をパターン形成するステップであって、前記半導体部上の前記接続構造の下端面と上端面がほぼ同じサイズである、ステップをさらに含む、請求項11に記載の方法。
- 少なくとも第1の金属材料を含む前記コンタクト構造上に、前記第1の金属材料と異なる第2の金属材料を堆積させるステップであって、前記第1のパッド構造は少なくとも前記第2の金属材料を含む、ステップをさらに含む、請求項10に記載の方法。
- 前記第1の金属材料はタングステンを含み、前記第2の金属材料はアルミニウムを含む、請求項13に記載の方法。
- 前記第1のパッド構造を形成するステップが、
前記絶縁部上に前記第1のパッド構造を形成するための1つまたは複数の層を堆積させるステップであって、前記コンタクト構造の端部は前記絶縁部から突出しており、前記絶縁部と界面を形成する1つまたは複数の層の下端面は、前記コンタクト構造の端部に対応する凹部を有する、ステップをさらに含む、請求項10に記載の方法。 - 前記第1のダイは、少なくとも、前記半導体部内に形成されたメモリセルアレイを備え、前記第2のダイは、前記メモリセルアレイのための周辺回路を備える、請求項10に記載の方法。
- 前記第1のダイと前記第2のダイを対面接合するステップが、
前記第1のダイ上の第1のボンディング構造を、前記第2のダイ上の第2のボンディング構造と接合するステップであって、前記第1のボンディング構造は前記第1のダイ上の前記コンタクト構造と導電結合されており、前記第2のボンディング構造は、前記第2のダイ上の入/出力回路と導電結合されている、ステップをさらに含む、請求項16に記載の方法。 - 前記第1のダイは、前記コンタクト構造に電気結合された入/出力回路を備える、請求項10に記載の方法。
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