JP2021507507A - 基板上に論理デバイスおよびパワー・デバイスを形成する方法ならびに基板上の論理デバイスおよびパワー・デバイス - Google Patents
基板上に論理デバイスおよびパワー・デバイスを形成する方法ならびに基板上の論理デバイスおよびパワー・デバイス Download PDFInfo
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Abstract
Description
Claims (14)
- 基板上に論理デバイスおよびパワー・デバイスを形成する方法であって、前記方法が、
前記基板の第1の領域上に第1の垂直フィンを形成し、前記基板の第2の領域上に第2の垂直フィンを形成すること
を含み、分離領域が前記第1の領域を前記第2の領域から分離し、前記方法がさらに、
前記第2の垂直フィン上に誘電性下層セグメントを形成すること、ならびに
前記誘電性下層セグメント上および前記第2の垂直フィン上に第1のゲート構造体を形成すること
を含む方法。 - 前記誘電性下層セグメントが5nmから10nmの範囲の厚さを有する、請求項1に記載の方法。
- 前記誘電性下層セグメントが、酸化シリコン(SiO)、酸化窒化シリコン(SiON)、ホウ素化炭化窒化シリコン(SiBCN)、酸化炭化窒化シリコン(SiOCN)およびこれらの組合せからなるグループから選択された材料でできた、請求項1に記載の方法。
- 前記第1のゲート構造体が、前記誘電性下層セグメント上のゲート誘電体層、前記ゲート誘電体層上の仕事関数層、および前記仕事関数層上の導電性ゲート充填材を含む、請求項1に記載の方法。
- 前記第1の垂直フィン上に第2のゲート構造体を形成することをさらに含み、前記ゲート構造体が、前記第1の垂直フィン上の第2のゲート誘電体層、前記ゲート誘電体層上の第2の仕事関数層、および前記第2の仕事関数層上の第2の導電性ゲート充填材を含む、請求項1に記載の方法。
- 前記第1の垂直フィン上の前記第2のゲート構造体および前記第2の垂直フィン上の前記第1のゲート構造体がそれぞれ逆T字形のゲート構造体であり、前記第2の領域上の導電性領域が逆T字形の形状を有する、請求項5に記載の方法。
- 前記第1の垂直フィンの下の前記基板内に下ソース/ドレイン領域を形成すること、および前記第2の垂直フィンの下の前記基板内にドープされたウェルを形成することをさらに含み、前記下ソース/ドレイン領域が、前記ドープされたウェルのドーパント濃度の少なくとも5倍のドーパント濃度を有する、請求項1に記載の方法。
- 前記第1の垂直フィン上に上ソース/ドレインを形成し、前記第2の垂直フィン上に上ソース/ドレインを形成することをさらに含む、請求項7に記載の方法。
- 前記上ソース/ドレイン上、前記ドープされたウェル上および前記下ソース/ドレイン領域上にコンタクト層を形成することをさらに含む、請求項8に記載の方法。
- 基板上の論理デバイスおよびパワー・デバイスであって、
前記基板の第1の領域上の第1の垂直フィンおよび前記基板の第2の領域上の第2の垂直フィンであり、分離領域が前記第1の領域を前記第2の領域から分離した、前記第1の垂直フィンおよび前記第2の垂直フィンと、
前記第1の垂直フィンの下方の前記基板内のドープされた第1のウェルおよび下ソース/ドレイン領域と、
前記第2の垂直フィンの下方の前記基板内のドープされた第2のウェルと、
前記下ソース/ドレイン領域上および前記ドープされた第2のウェル上の下スペーサ層と、
前記下スペーサ層上および前記第2の垂直フィン上の誘電性下層セグメントと、
前記誘電性下層セグメント上の第1のゲート誘電体層と
を備える、基板上の論理デバイスおよびパワー・デバイス。 - 前記第1の領域上の前記下スペーサ層上および前記第1の垂直フィン上の第2のゲート誘電体層をさらに備える、請求項16に記載の論理デバイスおよびパワー・デバイス。
- 前記ドープされた第1のウェルをp型にドープされたウェルとし、前記ドープされた第2のウェルをn型にドープされたウェルとすることができ、前記n型にドープされたウェルが、1×1017原子/cm3から1×1019原子/cm3の範囲のドーパント濃度を有し、前記下ソース/ドレイン領域が、1×1018原子/cm3から1×1021原子/cm3の範囲のドーパント濃度を有する、請求項17に記載の論理デバイスおよびパワー・デバイス。
- 前記n型にドープされたウェル上に形成されたコンタクト層をさらに備え、前記コンタクト層と前記垂直フィンとの間の横方向距離が20nmから200nmの範囲にある、請求項18に記載の論理デバイスおよびパワー・デバイス。
- 前記下ソース/ドレイン領域が、前記ドープされたウェルのドーパント濃度の少なくとも5倍の前記ドーパント濃度を有し、前記n型にドープされたウェルが30nmから150nmの範囲の深さを有する、請求項19に記載の論理デバイスおよびパワー・デバイス。
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DE112018005623T5 (de) | 2020-07-23 |
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