JP7326447B2 - 接触抵抗が低減された半導体デバイスの作製方法 - Google Patents
接触抵抗が低減された半導体デバイスの作製方法 Download PDFInfo
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- JP7326447B2 JP7326447B2 JP2021534958A JP2021534958A JP7326447B2 JP 7326447 B2 JP7326447 B2 JP 7326447B2 JP 2021534958 A JP2021534958 A JP 2021534958A JP 2021534958 A JP2021534958 A JP 2021534958A JP 7326447 B2 JP7326447 B2 JP 7326447B2
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- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 2
- 238000009616 inductively coupled plasma Methods 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
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- 238000005240 physical vapour deposition Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910005898 GeSn Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
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- 125000004429 atom Chemical group 0.000 description 1
- WYEMLYFITZORAB-UHFFFAOYSA-N boscalid Chemical compound C1=CC(Cl)=CC=C1C1=CC=CC=C1NC(=O)C1=CC=CN=C1Cl WYEMLYFITZORAB-UHFFFAOYSA-N 0.000 description 1
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- 230000006870 function Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- IWTIUUVUEKAHRM-UHFFFAOYSA-N germanium tin Chemical compound [Ge].[Sn] IWTIUUVUEKAHRM-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/285—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
- H01L21/28506—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers
- H01L21/28575—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising AIIIBV compounds
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- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/45—Ohmic electrodes
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
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- H01L29/452—Ohmic electrodes on AIII-BV compounds
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/45—Ohmic electrodes
- H01L29/456—Ohmic electrodes on silicon
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Description
[0002]半導体の設計、製造、及び動作の重要な課題は接触抵抗である。例えば、フィン型電界効果トランジスタ(FinFET)装置のソース及びドレイン領域は、ソース/ドレイン接点トレンチを形成するためのエッチング処理により浸食される可能性があり、これは接触抵抗の増加に繋がる。接触抵抗が増加する結果、トランジスタ及び半導体基板上に形成されるその他の装置構造を含む回路装置の性能が低下する。
Claims (18)
- 接点を形成するための方法であって、
ソース/ドレイン領域を露出させるために誘電体材料内にトレンチを形成することと、
前記ソース/ドレイン領域に前洗浄処理を実施することと、
ドープされた半導体層を前記ソース/ドレイン領域に形成することと、
選択的エピタキシャル堆積処理により、前記ドープされた半導体層上に金属ケイ化物層を形成することと、
前記トレンチをコンダクタで充填することと
を含む方法。 - 前記トレンチを前記コンダクタで充填することに先立ち、前記ドープされた半導体層上に前記金属ケイ化物層を形成することをさらに含む、請求項1に記載の方法。
- 前記金属ケイ化物層上にキャップ層を形成することをさらに含み、前記コンダクタは前記キャップ層上に配置される、請求項2に記載の方法。
- 前記ドープされた半導体層が、ドープされたシリコン、ドープされたゲルマニウム、ドープされたシリコン-ゲルマニウム、又はドープされたIII/V族化合物の半導体を含み、前記ドープされた半導体層が選択的エピタキシャル堆積処理により形成される、請求項3に記載の方法。
- 前記金属ケイ化物層が、ケイ化チタン、ケイ化コバルト、又はケイ化ルテニウムを含む、請求項4に記載の方法。
- 前記キャップ層が、窒化チタン、窒化ケイ素、酸化アルミニウム、酸化ハフニウム、酸化ジルコニウム、又は酸化マンガンを含み、前記キャップ層が原子層堆積処理により形成される、請求項5に記載の方法。
- 前記コンダクタが金属を含む、請求項6に記載の方法。
- 半導体構造から延びるソース/ドレイン領域と、
ソース/ドレイン領域の第1の部分に配置された、ドープされた半導体層と、
前記ドープされた半導体層上に配置された、選択的エピタキシャル堆積処理により形成された金属ケイ化物層と、
前記金属ケイ化物層上に配置されたキャップ層と、
前記キャップ層上に配置されたコンダクタと
を含む半導体デバイス。 - 前記ソース/ドレイン領域が、シリコン、ゲルマニウム、シリコン-ゲルマニウム、又はIII/V族化合物の半導体を含む、請求項8に記載の半導体デバイス。
- 前記半導体構造が、シリコン、ゲルマニウム、シリコン-ゲルマニウム、又はIII/V族化合物の半導体を含む、請求項9に記載の半導体デバイス。
- 前記ドープされた半導体層が、ドープされたシリコン、ドープされたゲルマニウム、ドープされたシリコン-ゲルマニウム、又はドープされたIII/V族化合物の半導体を含み、前記ドープされた半導体層が選択的エピタキシャル堆積処理により形成される、請求項10に記載の半導体デバイス。
- 前記金属ケイ化物層が、ケイ化チタン、ケイ化コバルト、又はケイ化ルテニウムを含む、請求項11に記載の半導体デバイス。
- 前記キャップ層が、窒化チタン、窒化ケイ素、酸化アルミニウム、酸化ハフニウム、酸化ジルコニウム、又は酸化マンガンを含む、請求項12に記載の半導体デバイス。
- 前記ソース/ドレイン領域の第2の部分上に配置された接触エッチング停止層をさらに含む、請求項8に記載の半導体デバイス。
- 前記接触エッチング停止層が、窒化ケイ素、酸窒化ケイ素、炭窒化ケイ素、又はこれらの組み合わせを含む、請求項14に記載の半導体デバイス。
- 前記コンダクタが金属を含む、請求項13に記載の半導体デバイス。
- 第1の移送チャンバ、
前記第1の移送チャンバに連結された複数の処理チャンバ、並びに
命令を記憶する非一過性のコンピュータ可読媒体であって、前記命令は、プロセッサによって実行されると前記処理チャンバのうちの1つ又は複数において方法を実施し、前記方法が:
ソース/ドレイン領域に前洗浄処理を実施すること、
ドープされた半導体層を前記ソース/ドレイン領域に形成すること、
選択的エピタキシャル堆積処理により、前記ドープされた半導体層上に金属ケイ化物層を形成すること、及び
前記ソース/ドレイン領域を露出させるために誘電体材料内に形成されているトレンチを、コンダクタで充填すること
を含む、前記非一過性のコンピュータ可読媒体
を備える基板処理システム。 - 前記方法が、前記第1の移送チャンバに連結された前記複数の処理チャンバのうちの1つにおいてエピタキシャル堆積処理を実施することをさらに含む、請求項17に記載の処理システム。
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