JP6905542B2 - 半導体素子およびその形成方法 - Google Patents
半導体素子およびその形成方法 Download PDFInfo
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- JP6905542B2 JP6905542B2 JP2018564233A JP2018564233A JP6905542B2 JP 6905542 B2 JP6905542 B2 JP 6905542B2 JP 2018564233 A JP2018564233 A JP 2018564233A JP 2018564233 A JP2018564233 A JP 2018564233A JP 6905542 B2 JP6905542 B2 JP 6905542B2
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- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
- H01L21/8232—Field-effect technology
- H01L21/8234—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type
- H01L21/8238—Complementary field-effect transistors, e.g. CMOS
- H01L21/823807—Complementary field-effect transistors, e.g. CMOS with a particular manufacturing method of the channel structures, e.g. channel implants, halo or pocket implants, or channel materials
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- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
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- H01L21/823437—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type with a particular manufacturing method of the gate conductors, e.g. particular materials, shapes
- H01L21/823456—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type with a particular manufacturing method of the gate conductors, e.g. particular materials, shapes gate conductors with different shapes, lengths or dimensions
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
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- H01L21/8234—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type
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- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
- H01L21/8232—Field-effect technology
- H01L21/8234—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type
- H01L21/823468—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type with a particular manufacturing method of the gate sidewall spacers, e.g. double spacers, particular spacer material or shape
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- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
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Description
Claims (17)
- 半導体素子を形成するための方法であって、
半導体基板に第1のソース/ドレイン領域および第2のソース/ドレイン領域を形成することと、
前記基板に第1のチャネル領域および第2のチャネル領域を形成することと、
前記第1のソース/ドレイン領域および前記第2のソース/ドレイン領域に下スペーサを形成することと、
前記第1のチャネル領域の側壁上に第1のゲート・スタックを、前記第2のチャネル領域の側壁上に第2のゲート・スタックを形成することと、
前記下スペーサの露出部上ならびに前記第1のゲート・スタックおよび前記第2のゲート・スタックの周囲にゲート導体層を形成することと、
前記第1のゲート・スタックに隣接した前記ゲート導体層の一部を除去することと、
前記ゲート導体層が前記第1のゲート・スタックに隣接して第1の厚さと前記第2のゲート・スタックに隣接して第2の厚さとを有し、前記第1の厚さが前記第2の厚さ未満であるように、前記第2のゲート・スタックに隣接した前記ゲート導体層の一部を除去することと、
前記第1のゲート・スタックおよび前記第2のゲート・スタックの一部を除去して前記第1のチャネル領域および前記第2のチャネル領域の一部を露出させることと、
前記第1のチャネル領域および前記第2のチャネル領域の露出部上に犠牲スペーサを形成することと、
前記ゲート導体層の露出部を除去して前記下スペーサの一部を露出させることと、
前記第1のゲート・スタックおよび前記第2のゲート・スタック上に上スペーサを付着することと、
前記第1のチャネル領域の露出部を除去して前記上スペーサにキャビティを形成することと、
前記上スペーサおよび層間誘電体層のキャビティに第3のソース/ドレイン領域を形成することと
を含む方法。 - 前記半導体基板に第1のキャビティおよび第2のキャビティを形成することと、
前記第1のキャビティに前記第1のソース/ドレイン領域を、前記第2のキャビティに前記第2のソース/ドレイン領域を形成することと、
前記第1のソース/ドレイン領域および前記第2のソース/ドレイン領域に前記下スペーサを形成することと、
前記下スペーサに、前記第1のソース/ドレイン領域の一部を露出させる第1のキャビティを形成し、かつ前記下スペーサに、前記第2のソース/ドレイン領域の一部を露出させる第2のキャビティを形成することと、
前記下スペーサの前記第1のキャビティに前記第1のチャネル領域を、前記下スペーサの前記第2のキャビティに前記第2のチャネル領域を成長させることと、
をさらに含む、請求項1に記載の方法。 - 前記下スペーサの一部を除去して前記第1のチャネル領域および前記第2のチャネル領域の側壁を露出させること、
をさらに含む、請求項2に記載の方法。 - 前記半導体基板に前記第1のキャビティを形成することおよび前記第2のキャビティを形成することが、
前記半導体基板に第1の領域および第2の領域をもつハードマスクをパターニングすることと、
前記基板の露出部にシャロー・トレンチ・アイソレーション領域を形成することと、
前記ハードマスクの前記第1の領域を除去し、前記基板の露出部に前記第1のキャビティを形成することと、
前記第1のキャビティに第1のソース/ドレイン領域を形成することと、
前記ハードマスクの前記第2の領域を除去し、前記基板の露出部に前記第2のキャビティを形成することと
を含む、請求項2または3に記載の方法。 - 前記ハードマスクの前記第2の領域を除去する前に前記第1のソース/ドレイン領域上に第2のハードマスクを形成することをさらに含む、請求項4に記載の方法。
- 前記上スペーサに前記キャビティを形成する前に前記上スペーサ上に層間誘電体層を形成することをさらに含む、請求項1または3に記載の方法。
- 前記上スペーサに前記キャビティを形成することが、前記層間誘電体層に前記キャビティを形成することを含む、請求項6に記載の方法。
- 前記第3のソース/ドレイン領域がエピタキシャル成長プロセスによって形成される、請求項1または3に記載の方法。
- 前記第2のチャネル領域の露出部を除去して前記上スペーサに別のキャビティを形成することと、
前記上スペーサおよび前記層間誘電体層の前記キャビティに第4のソース/ドレイン領域を形成することと、
をさらに含む、請求項1または3に記載の方法。 - 前記第1のチャネル領域および前記第2のチャネル領域がエピタキシャル成長プロセスによって成長される、請求項1または3に記載の方法。
- 前記第1のゲート・スタックが、
前記第1のチャネル領域および前記下スペーサ上にゲート・スタック材料の層を付着することと、
異方性エッチング・プロセスを行って前記ゲート・スタック材料の層の一部を除去することと
によって形成される、請求項1または3に記載の方法。 - 半導体素子を形成するための方法であって、
基板に第1のソース/ドレイン領域および第2のソース/ドレイン領域を形成することと、
前記第1のソース/ドレイン領域および前記第2のソース/ドレイン領域に第1のスペーサ層を形成することと、
前記第1のスペーサ層に、前記第1のソース/ドレイン領域の一部を露出させる第1のキャビティを形成し、かつ前記第1のスペーサ層に、前記第2のソース/ドレイン領域を露出させる第2のキャビティを形成することと、
前記第1のキャビティに第1のチャネル領域を、前記第2のキャビティに第2のチャネル領域を成長させることと、
前記第1のチャネル領域および前記第2のチャネル領域にゲート・スタック層を形成して、第1のゲート・スタックおよび第2のゲート・スタックを形成することと、
前記第1のゲート・スタックおよび前記第2のゲート・スタックに隣接してゲート導体層を形成することと、
前記第1のチャネル領域に隣接して前記ゲート導体層の一部を凹加工することと、
前記ゲート導体層に第2のスペーサを形成することと、
前記第1のチャネル領域に第3のソース/ドレイン領域を、前記第2のチャネル領域に第4のソース/ドレイン領域を形成することと
を含む方法。 - 前記第1のチャネル領域に隣接して前記ゲート導体層の前記一部を凹加工した後に、前記ゲート・スタック層の露出部を除去する、請求項12に記載の方法。
- 前記第3のソース/ドレイン領域および前記第4のソース/ドレイン領域が前記第2のスペーサに設けられる、請求項12に記載の方法。
- 半導体素子を形成するための方法であって、
半導体基板にトレンチ・アイソレーション領域を形成することと、
前記基板にキャビティを形成することと、
前記キャビティに第1のソース/ドレイン領域を形成することと、
前記第1のソース/ドレイン領域にスペーサ材料の層を形成することと、
前記スペーサ材料の層に、前記第1のソース/ドレイン領域を露出させるキャビティを形成することと、
前記スペーサ材料の層の前記キャビティにチャネル領域を成長させることと、
前記スペーサ材料の層の一部を除去して前記チャネル領域の一部を露出させることと、
前記チャネル領域にゲート・スタックを形成することと、
前記ゲート・スタックにゲート導体層を付着することと、
前記ゲート導体層の一部を除去して前記ゲート・スタックの一部を露出させることと、
前記ゲート・スタックの露出部を除去して前記チャネル領域の一部を露出させることと、
前記チャネル領域上にスペーサ材料の第2の層を付着することと、
前記チャネル領域の一部を除去して前記スペーサ材料の第2の層にキャビティを形成することと、
前記スペーサ材料の第2の層の前記キャビティに第2のソース/ドレイン領域を形成することと
を含む方法。 - 半導体素子であって、
半導体基板に設けられる第1のソース/ドレイン領域と、
前記第1のソース/ドレイン領域の高さ位置で前記半導体基板に設けられる第2のソース/ドレイン領域と、
前記第1のソース/ドレイン領域および前記第2のソース/ドレイン領域に設けられる下スペーサと、
前記高さ位置の前記下スペーサから上方に垂直に前記第1のソース/ドレイン領域に設けられる第1の長さを有する第1のゲート・スタックと、
前記高さ位置の前記下スペーサから上方に垂直に前記第2のソース/ドレイン領域に設けられる第2の長さを有する第2のゲート・スタックであって、前記第1の長さが前記第2の長さより短い、前記第2のゲート・スタックと、
前記第1のゲート・スタックおよび前記第2のゲート・スタックに設けられる上スペーサと、
を備える半導体素子。 - 前記素子が縦型電界効果トランジスタを含む、請求項16に記載の半導体素子。
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US15/197,859 US10424515B2 (en) | 2016-06-30 | 2016-06-30 | Vertical FET devices with multiple channel lengths |
PCT/IB2017/053238 WO2018002742A1 (en) | 2016-06-30 | 2017-06-01 | Vertical fet devices with multiple channel lengths |
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