JP7304115B2 - 半導体デバイス、半導体装置および半導体デバイス形成方法 - Google Patents
半導体デバイス、半導体装置および半導体デバイス形成方法 Download PDFInfo
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- JP7304115B2 JP7304115B2 JP2020521345A JP2020521345A JP7304115B2 JP 7304115 B2 JP7304115 B2 JP 7304115B2 JP 2020521345 A JP2020521345 A JP 2020521345A JP 2020521345 A JP2020521345 A JP 2020521345A JP 7304115 B2 JP7304115 B2 JP 7304115B2
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Description
Claims (19)
- 半導体デバイスであって、
トランジスタ構造内に形成されたソース領域およびドレイン領域と、
前記ソース領域と前記ドレイン領域との間に配置されたチャネル領域と、
前記チャネル領域上に形成され、半導体材料を含むクラッド層と、
前記クラッド層内に形成された散乱中心と、
前記クラッド層上に形成されたゲート構造のゲート誘電体と
を含む半導体デバイス。 - 前記クラッド層は、前記ソース領域および前記ドレイン領域のドーパント導電性と反対のドーパント導電性を備えるドープされた材料を含む、請求項1に記載の半導体デバイス。
- 前記クラッド層は、5×1018原子/cm3から5×1019原子/cm3までの間のドーパント濃度を含むドープされた材料を含む、請求項1または2に記載の半導体デバイス。
- 前記クラッド層は、2nmから15nmまでの間の厚さを備える、請求項1ないし3のいずれかに記載の半導体デバイス。
- 前記ゲート構造の側壁に形成され、前記クラッド層の側面を被覆するスペーサをさらに含む、請求項1ないし4のいずれかに記載の半導体デバイス。
- 前記半導体デバイスは、前記半導体デバイス上に形成された通常デバイスより低いチャネル電流を有する低電流デバイスを含む、請求項1ないし5のいずれかに記載の半導体デバイス。
- 半導体装置であって、
基板と、
前記基板上に形成され、第1の線と前記第1の線と交差するように形成された第2の線とを含むクロスバー格子と、
前記クロスバー格子の第1の線と第2の線との交差点に形成されたトランジスタであって、通常のトランジスタよりも低いチャネル電流を有する低電流トランジスタを含む前記トランジスタと
を含み、前記低電流トランジスタは、
前記基板に配置されたソース領域およびドレイン領域と、
前記ソース領域と前記ドレイン領域との間に配置されたチャネル領域と、
前記チャネル領域上に形成され、半導体材料を含むクラッド層と、
前記クラッド層上に形成されたゲート構造のゲート誘電体と
を含む、半導体装置。 - 前記クラッド層内に形成された散乱中心をさらに含む、請求項7に記載の半導体装置。
- 半導体デバイスを形成する方法であって、
低電流デバイス領域内のトランジスタ構造上にドープ・クラッド層を形成することと、
前記低電流デバイス領域内の前記ドープ・クラッド層上と通常デバイス領域内のトランジスタ構造上とにゲート構造を形成することと、
通常デバイスより低いチャネル電流を有する前記低電流デバイス領域内の低電流デバイスのための凹部を形成するために、ゲート誘電体の下の前記ドープ・クラッド層を横方向に陥凹させるように前記ドープ・クラッド層を選択的にエッチングすることと、
前記低電流デバイスにおいて前記凹部を満たすスペーサを形成することと、
前記低電流デバイス領域に前記低電流デバイスを形成するためと前記通常デバイス領域に前記通常デバイスを形成するために、前記ゲート構造の両側にソース領域とドレイン領域とを形成することと
を含む方法。 - 前記ドープ・クラッド層を形成することは、前記ドープ・クラッド層をその場ドーピングを使用してエピタキシャル成長させることを含み、前記その場ドーピングは前記ソース領域および前記ドレイン領域のドーパンド導電性とは反対のドーパント導電性を備える、請求項9に記載の方法。
- 前記その場ドーピングする前記ドープ・クラッド層は、5×1018原子/cm3から5×1019原子/cm3までの間のドーパント濃度を含むドープされた材料を含む、請求項10に記載の方法。
- 前記ドープ・クラッド層は2nmから15nmまでの間の厚さを備える、請求項9ないし11のいずれかに記載の方法。
- 前記ドープ・クラッド層内に散乱中心を形成することをさらに含む、請求項9ないし12のいずれかに記載の方法。
- 前記散乱中心を形成することは前記ドープ・クラッド層に希ガス・イオンを照射することを含む、請求項13に記載の方法。
- 前記スペーサは、前記低電流デバイスのチャネル領域内の前記ソース領域と前記ドレイン領域とをアンダーカットする、請求項9ないし14のいずれかに記載の方法。
- 半導体デバイスを形成する方法であって、
基板上にハード・マスク層を形成することと、
前記基板内に前記ハード・マスク層とトランジスタ構造とをパターン形成することと、
低電流デバイス領域内の前記トランジスタ構造上から前記ハード・マスク層を除去することと、
前記低電流デバイス領域内の前記トランジスタ構造上にドープ・クラッド層を成長させることと、
通常デバイス領域から前記ハード・マスク層を除去することと、
前記低電流デバイス領域内の前記ドープ・クラッド層と前記通常デバイス領域内の前記トランジスタ構造上にゲート構造を形成することと、
通常デバイスより低いチャネル電流を有する前記低電流デバイス領域内の低電流デバイスのための凹部を形成するために、ゲート誘電体の下の前記ドープ・クラッド層を横方向に陥凹させるように前記ドープ・クラッド層を選択的にエッチングすることと、
前記低電流デバイスにおいて前記凹部を満たすスペーサを形成することと、
前記低電流デバイス領域に前記低電流デバイスを形成するためと前記通常デバイス領域に前記通常デバイスを形成するために、前記ゲート構造の両側にソース領域とドレイン領域とを形成することと
を含む方法。 - 前記ドープ・クラッド層を形成することは、前記ドープ・クラッド層をその場ドーピングを使用してエピタキシャル成長させることを含み、前記その場ドーピングは前記ソース領域および前記ドレイン領域のドーパンド導電性とは反対のドーパント導電性を備える、請求項16に記載の方法。
- 前記ドープ・クラッド層内に散乱中心を形成することをさらに含む、請求項16または17に記載の方法。
- 前記スペーサは、前記低電流デバイスのチャネル領域内の前記ソース領域と前記ドレイン領域とをアンダーカットする、請求項16ないし18のいずれかに記載の方法。
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