JP4492947B2 - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- JP4492947B2 JP4492947B2 JP2004216152A JP2004216152A JP4492947B2 JP 4492947 B2 JP4492947 B2 JP 4492947B2 JP 2004216152 A JP2004216152 A JP 2004216152A JP 2004216152 A JP2004216152 A JP 2004216152A JP 4492947 B2 JP4492947 B2 JP 4492947B2
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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
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76835—Combinations of two or more different dielectric layers having a low dielectric constant
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- 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
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- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31105—Etching inorganic layers
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- 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
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- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
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- 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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
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- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31144—Etching the insulating layers by chemical or physical means using masks
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- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76802—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics
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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
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76802—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics
- H01L21/76807—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics for dual damascene structures
- H01L21/76811—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics for dual damascene structures involving multiple stacked pre-patterned masks
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- 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
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76802—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics
- H01L21/76807—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics for dual damascene structures
- H01L21/76813—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics for dual damascene structures involving a partial via etch
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- 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
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76829—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers
- H01L21/76831—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers in via holes or trenches, e.g. non-conductive sidewall liners
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- 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
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76829—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers
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- Condensed Matter Physics & Semiconductors (AREA)
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- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Drying Of Semiconductors (AREA)
Description
(実施の形態1)
図1〜4は、本発明の実施の形態1にかかる銅埋め込みのダマシン配線構造体の製造工程別素子断面図である。
次に、本発明の実施の形態2について、図9〜11を参照して以下に説明する。この場合の特徴は、本発明が銅(合金)埋め込みのデュアルダマシン配線に適用されているところである。ここで、図9〜11は、上層配線をビアプラグとダマシン配線とを一体に形成したデュアルダマシン配線構造体の製造工程別素子断面図である。
2 第1層間絶縁膜
2a 第1エッチングストッパー層
2b、22b 第1低誘電率膜
2c 第1キャップ層
3,11 レジストマスク
4,24 ビアホール
5 第1バリアメタル膜
6 第1Cu膜
7 第1バリア層
8 ビアプラグ
9 第2層間絶縁膜
9a 第2エッチングストッパー層
9b、22d 第2低誘電率膜
9c 第2キャップ層
10,25 トレンチ
12 第2バリアメタル膜
13 第2Cu膜
14 第2バリア層
15,29 上層配線
22 層間絶縁膜
22a エッチングストッパー層
22c ミッドストッパー層
22e キャップ層(第1ハードマスク層)
23 第2ハードマスク層
26 バリアメタル膜
27 Cu膜
28 バリア層
Claims (8)
- 半導体基板上に形成した多孔質の絶縁膜を少なくとも一部に有する層間絶縁膜にビアホールあるいは配線用溝を設け前記ビアホールあるいは配線用溝に導電体膜を埋め込んで配線を形成する半導体装置の製造方法において、
(a)素子が形成された半導体基板上に絶縁膜を介して銅を主成分とする導電層を形成する工程、
(b)前記導電層の上部に、炭化シリコン膜又は炭化シリコンに水素、酸素、又は窒素を含有させた膜からなる第1の絶縁膜を形成する工程、
(c)前記第1の絶縁膜上に多孔質の第2の絶縁膜を形成する工程、
(d)前記第2の絶縁膜上に該第2の絶縁膜とは別種の第3の絶縁膜を形成する工程、
(e)前記第3の絶縁膜と前記第2の絶縁膜を順にドライエッチングして、前記第2の絶縁膜と前記第3の絶縁膜にビアホールあるいは配線用溝を形成する工程、
(f)前記第3の絶縁膜をエッチングマスクにし、フッ素化合物ガスと窒素含有ガスと不活性ガスとを含み酸素を含有しない混合ガスをエッチングガスに用い、エッチング処理室における前記混合ガスの圧力を0.1Pa〜6.0Paの範囲に制御したドライエッチングにより、前記第1の絶縁膜の一部を除去し前記ビアホールあるいは配線用溝を前記導電層の表面まで貫通させる工程、
(g)前記ビアホールあるいは配線用溝内に導電体膜を充填する工程、
を含んでなることを特徴とする半導体装置の製造方法。 - 半導体基板上に形成した多孔質の絶縁膜を少なくとも一部に有する層間絶縁膜にビアホールあるいは配線用溝を設け前記ビアホールあるいは配線用溝に導電体膜を埋め込んで配線を形成する半導体装置の製造方法において、
(a)素子が形成された半導体基板上に絶縁膜を介して銅を主成分とする導電層を形成する工程、
(b)前記導電層の上部に、炭化シリコン膜又は炭化シリコンに水素、酸素、又は窒素を含有させた膜からなる第1の絶縁膜を形成する工程、
(c)前記第1の絶縁膜上に多孔質の第2の絶縁膜を形成する工程、
(d)前記第2の絶縁膜上に該第2の絶縁膜とは別種の第3の絶縁膜を形成し、前記第3の絶縁膜上に、炭化シリコン膜又は炭化シリコンに水素、酸素、又は窒素を含有させた膜からなる第4の絶縁膜を形成する工程、
(e)前記第4の膜と前記第3の絶縁膜と前記第2の絶縁膜を順にドライエッチングして、前記第2の絶縁膜と前記第3の絶縁膜と第4の絶縁膜にビアホールあるいは配線用溝を形成する工程、
(f)フッ素化合物ガスと窒素含有ガスと不活性ガスとを含み酸素を含有しない混合ガスをプラズマ励起し前記第3の絶縁膜をエッチングマスクにしたドライエッチングにより、前記第1の絶縁膜の一部をエッチング除去すると共に、前記プラズマ励起で生成するイオンにより前記第1の絶縁膜と共に前記第4の絶縁膜表面をスパッタリングし該スパッタリングで生じる飛散物あるいは反応生成物を前記ビアホールあるいは配線用溝の側壁に付着させて、前記ビアホールあるいは配線用溝を前記導電層の表面まで貫通させると共に、前記ビアホールあるいは配線用溝の側壁に側壁保護層を形成する工程、
(g)前記ビアホールあるいは配線用溝内に導電体膜を充填する工程、
を含んでなることを特徴とする半導体装置の製造方法。 - 請求項1又は2に記載の前記(f)工程において、前記フッ素化合物ガスは、CF4、CHF3、CH2F2、CH3F、SF6、NF3からなる群より選択された少なくとも一種のエッチングガスであることを特徴とする半導体装置の製造方法。
- 請求項1ないし3記載の前記(f)工程において、前記窒素含有ガスは、N2、NH3、N2H4からなる群より選択された少なくとも一種のエッチングガスであることを特徴とする請求項1〜3のいずれか一項に記載の半導体装置の製造方法。
- 請求項1ないし3記載の前記(e)工程において、前記第2の絶縁膜のドライエッチングは、CxHyFzの化学式(x、y、zは、x≧4、y≧0、z≧1を満たす整数)で表されるフルオロカーボンガスからなる群より選択された少なくとも一種のエッチングガスを用いて行われることを特徴とする半導体装置の製造方法。
- 請求項5記載の前記フルオロカーボンガスは、C4F6、C4F8あるいはC5F8ガスであることを特徴とする半導体装置の製造方法。
- 請求項1ないし5記載の前記(e)工程のドライエッチングにおいて、エッチングガスに不活性ガスが添加されることを特徴とする半導体装置の製造方法。
- 請求項1ないし7記載の(f)工程における前記混合ガスは、CHF3/Ar/N2混合ガス、または、CF4/Ar/N2混合ガスである半導体装置の製造方法。
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JP2004216152A JP4492947B2 (ja) | 2004-07-23 | 2004-07-23 | 半導体装置の製造方法 |
US11/183,806 US7799693B2 (en) | 2004-07-23 | 2005-07-19 | Method for manufacturing a semiconductor device |
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KR100698094B1 (ko) * | 2005-07-27 | 2007-03-23 | 동부일렉트로닉스 주식회사 | 반도체 소자의 금속배선 형성방법 |
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KR100703559B1 (ko) * | 2005-12-28 | 2007-04-03 | 동부일렉트로닉스 주식회사 | 듀얼다마신 구조를 가지는 반도체 소자 및 그 제조방법 |
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US20070218698A1 (en) * | 2006-03-16 | 2007-09-20 | Tokyo Electron Limited | Plasma etching method, plasma etching apparatus, and computer-readable storage medium |
JP4684924B2 (ja) * | 2006-03-16 | 2011-05-18 | 東京エレクトロン株式会社 | プラズマエッチング方法、プラズマエッチング装置及びコンピュータ記憶媒体 |
JP2007266460A (ja) | 2006-03-29 | 2007-10-11 | Rohm Co Ltd | 半導体装置およびその製造方法 |
JP2008053507A (ja) * | 2006-08-25 | 2008-03-06 | Matsushita Electric Ind Co Ltd | ドライエッチング方法 |
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