JP4666308B2 - 半導体装置の製造方法 - Google Patents
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Description
(a)複数の半導体素子を形成した半導体基板上方に第1ポーラスシリカ膜を塗布する工程と、
(b)前記第1ポーラスシリカ膜に紫外光を照射するか、または水素プラズマ処理をして機械的強度を増加させる工程と、
(c)前記機械的強度を増加させる工程の後、前記第1ポーラスシリカ膜上方に、第2ポーラスシリカ膜を塗布する工程と、
(d)前記第2ポーラスシリカ膜中に配線パターン、前記第1ポーラスシリカ膜中にビア導電体を有する埋め込み配線を形成する工程と、
を含み、前記第2ポーラスシリカ膜には紫外光の照射および水素プラズマ処理を行わない半導体装置の製造方法
が提供される。
基板温度:350℃
UV光波長:200nm〜300nm、
照射エネルギ:220mW/cm2、
照射時間:600秒、
雰囲気:He、
圧力:1.2torr
であった。UV処理後、ヤング率、硬度、比誘電率を測定した。ヤングと硬度は、ナノインデンテーション法を用いて測定し、比誘電率は、水銀プローブを用いて測定した。ヤング率と硬度は膜の機械的強度を示す特性と考えられる。比誘電率は低誘電率の誘電体の本来の特徴であり、処理により余り増大しないことが望まれる。
ヤング率は10から12に増大し、硬度は0.9から1.1に増大した。層間クラックを防止するのに効果のある機械的強度の増加と考えられる。比誘電率は、2.2から2.3に増加した。
基板温度:400℃、
H2流量:4000sccm、
圧力:2.3torr、
投入電力(13.56MHz):100W(投入電力から反射電力を引いた実効値)、
プラズマ処理時間:80秒、
であった。
複数の半導体素子を有する半導体基板と、
前記半導体基板上方に形成された埋め込み配線であって、下層の導電体と接続するためのビア導電体と、ビア導電体上に接続された配線パターンとを有する埋め込み配線と、
前記埋め込み配線周囲を囲む層間絶縁膜であって、ビア導電体を囲む下層絶縁膜と配線パターンを囲む上層絶縁膜とを含み、前記下層絶縁膜と上層絶縁膜とは同一出発材料から形成され、前記下層絶縁膜は前記上層絶縁膜より高い機械的強度を有する層間絶縁膜と、
を有する半導体装置。
前記下層絶縁膜と前記上層絶縁膜との間に配置され、エッチストッパとして機能する材質の中層絶縁膜をさらに有する付記1記載の半導体装置。
前記中層絶縁膜は、SiCで形成された付記2記載の半導体装置。
前記下層絶縁膜と前記上層絶縁膜は、ポーラス絶縁膜で形成された付記1〜3のいずれか1項記載の半導体装置。
前記ポーラス絶縁膜がポーラスシリカで形成された付記5記載の半導体装置。
前記下層絶縁膜は前記上層絶縁膜より1GPa以上大きいヤング率を有する付記5記載の半導体装置。
前記埋め込み配線は、バリア層と銅層との積層で形成された付記1〜6のいずれか1項記載の半導体装置。
前記下層絶縁膜の下に形成された絶縁性銅拡散防止膜をさらに含む付記7記載の半導体装置。
(a)複数の半導体素子を形成した半導体基板上方に下層絶縁膜を塗布する工程と、
(b)前記下層絶縁膜を処理して機械的強度を増加させる工程と、
(c)前記下層絶縁膜上方に、上層絶縁膜を塗布する工程と、
(d)前記上層絶縁膜中に配線パターン、前記下層絶縁膜中にビア導電体を有する埋め込み配線を形成する工程と、
を含む半導体装置の製造方法。
前記工程(b)は、前記下層絶縁膜内で架橋反応を生じさせる付記9記載の半導体装置の製造方法。
前記工程(b)は、紫外光を照射することを含む付記9または10記載の半導体装置の製造方法。
前記紫外光は、波長200nm〜300nmの成分を含む付記11記載の半導体装置の製造方法。
前記工程(b)は、水素プラズマで処理することを含む付記9または10記載の半導体装置の製造方法。
前記工程(a)と(c)とは、同一ポーラス絶縁材料を塗布する付記9〜13のいずれか1項記載の半導体装置の製造方法。
前記ポーラス絶縁材料はポーラスシリカである付記14記載の半導体装置の製造方法。
前記工程(a)と(c)とは、塗布膜を次第に昇温する複数のベーク温度でベークする工程を含む付記14または15記載の半導体装置の製造方法。
前記工程(b)は、前記下層絶縁膜のベーク後、前記複数のベーク温度の内、最高のベーク温度以上に基板を加熱して行う付記16記載の半導体装置の製造方法。
(e)前記工程(b)と(c)の間に、エッチストッパとして機能する中層絶縁膜を前記下層絶縁膜の上に形成する工程をさらに含み、
前記工程(d)は、前記上層絶縁膜から前記下層絶縁膜まで貫通するビア孔を形成する工程と、前記中層絶縁膜をエッチストッパとして用いて少なくとも前記上層絶縁膜に配線パターン用トレンチを形成する工程と、を含む付記9〜17のいずれか1項記載の半導体装置の製造方法。
(f)前記工程(d)の後、前記埋め込み配線を覆って前記上層絶縁膜の上に絶縁性銅拡散防止膜を形成する工程をさらに含む付記9〜18のいずれか1項記載の半導体装置の製造方法。
2 ポーラスシリカ膜、
21 シリコン基板、
22 素子分離領域(STI)、
23 ゲート絶縁膜、
24 ゲート電極、
25 エクステンション領域、
26 サイドウォールスペーサ、
27 ソース/ドレイン領域、
28 下方層間絶縁膜、
29 導電性プラグ、
NW n型ウェル、
PW p型ウェル、
NMOS nチャネルMOSトランジスタ、
ES エッチストッパ膜、
PS ポーラスシリカ膜、
CL キャップ層、
DB 銅拡散防止膜、
CW 銅配線、
UV 紫外線、
PL プラズマ、
Claims (3)
- (a)複数の半導体素子を形成した半導体基板上方に第1ポーラスシリカ膜を塗布する工程と、
(b)前記第1ポーラスシリカ膜に紫外光を照射するか、または水素プラズマ処理をして機械的強度を増加させる工程と、
(c)前記機械的強度を増加させる工程の後、前記第1ポーラスシリカ膜上方に、第2ポーラスシリカ膜を塗布する工程と、
(d)前記第2ポーラスシリカ膜中に配線パターン、前記第1ポーラスシリカ膜中にビア導電体を有する埋め込み配線を形成する工程と、
を含み、前記第2ポーラスシリカ膜には紫外光の照射および水素プラズマ処理を行わない半導体装置の製造方法。 - 前記工程(a)と(c)とは、同一ポーラスシリカ材料を塗布する請求項1に記載の半導体装置の製造方法。
- (e)前記工程(b)と(c)の間に、エッチストッパとして機能する中層絶縁膜を前記第1ポーラスシリカ膜の上に形成する工程をさらに含み、
前記工程(d)は、前記第2ポーラスシリカ膜から前記第1ポーラスシリカ膜まで貫通するビア孔を形成する工程と、前記中層絶縁膜をエッチストッパとして用いて少なくとも前記第2ポーラスシリカ膜に配線パターン用トレンチを形成する工程と、を含む請求項1または2に記載の半導体装置の製造方法。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006048131A JP4666308B2 (ja) | 2006-02-24 | 2006-02-24 | 半導体装置の製造方法 |
| US11/451,506 US20070200235A1 (en) | 2006-02-24 | 2006-06-13 | Semiconductor device having reinforced low-k insulating film and its manufacture method |
| US12/774,302 US8772182B2 (en) | 2006-02-24 | 2010-05-05 | Semiconductor device having reinforced low-k insulating film and its manufacture method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006048131A JP4666308B2 (ja) | 2006-02-24 | 2006-02-24 | 半導体装置の製造方法 |
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| Publication Number | Publication Date |
|---|---|
| JP2007227720A JP2007227720A (ja) | 2007-09-06 |
| JP4666308B2 true JP4666308B2 (ja) | 2011-04-06 |
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Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7253125B1 (en) | 2004-04-16 | 2007-08-07 | Novellus Systems, Inc. | Method to improve mechanical strength of low-k dielectric film using modulated UV exposure |
| US9659769B1 (en) | 2004-10-22 | 2017-05-23 | Novellus Systems, Inc. | Tensile dielectric films using UV curing |
| US8889233B1 (en) | 2005-04-26 | 2014-11-18 | Novellus Systems, Inc. | Method for reducing stress in porous dielectric films |
| US8454750B1 (en) | 2005-04-26 | 2013-06-04 | Novellus Systems, Inc. | Multi-station sequential curing of dielectric films |
| US8980769B1 (en) | 2005-04-26 | 2015-03-17 | Novellus Systems, Inc. | Multi-station sequential curing of dielectric films |
| US10037905B2 (en) * | 2009-11-12 | 2018-07-31 | Novellus Systems, Inc. | UV and reducing treatment for K recovery and surface clean in semiconductor processing |
| US8850451B2 (en) * | 2006-12-12 | 2014-09-30 | International Business Machines Corporation | Subscribing for application messages in a multicast messaging environment |
| US8211510B1 (en) | 2007-08-31 | 2012-07-03 | Novellus Systems, Inc. | Cascaded cure approach to fabricate highly tensile silicon nitride films |
| US9050623B1 (en) | 2008-09-12 | 2015-06-09 | Novellus Systems, Inc. | Progressive UV cure |
| CN102379036B (zh) * | 2009-04-30 | 2015-04-08 | 瑞萨电子株式会社 | 半导体器件及其制造方法 |
| JP5412320B2 (ja) * | 2009-05-26 | 2014-02-12 | 株式会社コベルコ科研 | 被覆ソーワイヤ |
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| US9054110B2 (en) * | 2011-08-05 | 2015-06-09 | Taiwan Semiconductor Manufacturing Company, Ltd. | Low-K dielectric layer and porogen |
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| JP3888794B2 (ja) * | 1999-01-27 | 2007-03-07 | 松下電器産業株式会社 | 多孔質膜の形成方法、配線構造体及びその形成方法 |
| US6156671A (en) * | 1999-03-10 | 2000-12-05 | United Microelectronics Corp. | Method for improving characteristic of dielectric material |
| JP3990920B2 (ja) | 2001-03-13 | 2007-10-17 | 東京エレクトロン株式会社 | 膜形成方法及び膜形成装置 |
| US6984892B2 (en) * | 2001-03-28 | 2006-01-10 | Lam Research Corporation | Semiconductor structure implementing low-K dielectric materials and supporting stubs |
| JP3886779B2 (ja) * | 2001-11-02 | 2007-02-28 | 富士通株式会社 | 絶縁膜形成用材料及び絶縁膜の形成方法 |
| JP3974023B2 (ja) | 2002-06-27 | 2007-09-12 | 富士通株式会社 | 半導体装置の製造方法 |
| JP4338495B2 (ja) * | 2002-10-30 | 2009-10-07 | 富士通マイクロエレクトロニクス株式会社 | シリコンオキシカーバイド、半導体装置、および半導体装置の製造方法 |
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| JP4454242B2 (ja) * | 2003-03-25 | 2010-04-21 | 株式会社ルネサステクノロジ | 半導体装置およびその製造方法 |
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| JP4057972B2 (ja) | 2003-07-25 | 2008-03-05 | 富士通株式会社 | 半導体装置の製造方法 |
| TWI285938B (en) * | 2003-08-28 | 2007-08-21 | Fujitsu Ltd | Semiconductor device |
| US6924242B2 (en) * | 2003-10-23 | 2005-08-02 | Taiwan Semiconductor Manufacturing Company, Ltd. | SiOC properties and its uniformity in bulk for damascene applications |
| US7030468B2 (en) * | 2004-01-16 | 2006-04-18 | International Business Machines Corporation | Low k and ultra low k SiCOH dielectric films and methods to form the same |
| JP2005317835A (ja) * | 2004-04-30 | 2005-11-10 | Semiconductor Leading Edge Technologies Inc | 半導体装置 |
| JP2006128543A (ja) * | 2004-11-01 | 2006-05-18 | Nec Electronics Corp | 電子デバイスの製造方法 |
| CN1787186A (zh) * | 2004-12-09 | 2006-06-14 | 富士通株式会社 | 半导体器件制造方法 |
| JP2006216746A (ja) * | 2005-02-03 | 2006-08-17 | Sony Corp | 半導体装置 |
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| US8772182B2 (en) | 2014-07-08 |
| US20100216303A1 (en) | 2010-08-26 |
| US20070200235A1 (en) | 2007-08-30 |
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