JP5710892B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
- Publication number
- JP5710892B2 JP5710892B2 JP2010110440A JP2010110440A JP5710892B2 JP 5710892 B2 JP5710892 B2 JP 5710892B2 JP 2010110440 A JP2010110440 A JP 2010110440A JP 2010110440 A JP2010110440 A JP 2010110440A JP 5710892 B2 JP5710892 B2 JP 5710892B2
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- Prior art keywords
- insulating film
- interlayer insulating
- multilayer wiring
- pad
- wiring structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Description
基板と、
前記基板上に形成され、低誘電率膜により構成された層間絶縁膜を少なくとも一部の層に含む多層配線構造と、
前記基板上の前記多層配線構造上に形成されたパッドと、を含み、
前記多層配線構造が、
前記パッドと平面視で重なる領域に形成された配線を含む配線用層間絶縁膜と、前記パッドと平面視で重なる領域に形成されたビアを含むビア用層間絶縁膜とが積層された下部多層配線構造と、
前記下部多層配線構造上に、前記パッドと平面視で重なる領域に形成された配線を含む配線用層間絶縁膜と、前記パッドと平面視で重なる領域に形成されたビアを含むビア用層間絶縁膜とが積層された上部多層配線構造と、
前記下部多層配線構造と上部多層配線構造との間に形成された中間絶縁膜と、
を含み、
前記パッドと平面視で重なる領域において、前記上部多層配線構造の前記配線および前記ビアは、前記パッドと接続して形成され、
前記パッドと平面視で重なる領域において、前記中間絶縁膜には、前記上部多層配線構造の前記配線または前記ビアと、前記下部多層配線構造の前記配線または前記ビアとを接続する導電材料が形成されず、
前記パッドと平面視で重なる領域において、前記下部多層配線構造に含まれる前記ビア用層間絶縁膜中の前記ビアが占める面積率が、前記上部多層配線構造に含まれる前記ビア用層間絶縁膜中の前記ビアが占める面積率よりも小さい半導体装置が提供される。
本実施の形態において、上述したように、ボンディングパッド72直下には、ボンディングパッド72とほぼ同じ領域を占める上部配線65が形成されている。また、上部配線65の下方には、ボンディングパッド72とほぼ同じ領域を占める上部配線55が形成されており、上部配線65と上部配線55との間には、面積率の大きい上部ビア59が存在している。そのため、上部配線55、上部ビア59および上部配線65により、1つの分厚いボンディングパッドが存在するような構成となっている。この部分を図中、上部多層配線構造92として示している。銅等の金属膜で構成された配線やビアは、外部から加えられた力を跳ね返そうとする性質である弾性が酸化膜等の層間絶縁膜より大きいため、ボンディングパッド72下に、このような構成の配線およびビアを配置することにより、強度が確保でき、ボンディングワイヤ時の衝撃に対する耐性を向上することができる。これにより、半導体装置100の上層における層間絶縁膜のクラック等を防ぐことができる。
ここで、各ビア用層間絶縁膜としては、ポーラスSiOC、各配線用層間絶縁膜としては、ポーラスシリカを用いた。また、上部多層配線構造92の上部ビア用層間絶縁膜58における上部ビア59の面積率は20%とした。また、下部多層配線構造90に含まれる各下部配線用層間絶縁膜中の配線が占める面積率は、それぞれ25%、上部多層配線構造92に含まれる各上部配線用層間絶縁膜中の配線が占める面積率は、それぞれ88.9%とした。
図7は、図5(a)に示した半導体装置100の変形例を示す模式図である。図5(a)に示した例では、下部多層配線構造90の各下部ビア用層間絶縁膜中のビアが占める面積率が、互いに略等しい例を示したが、これらは、互いに異なる構成とすることができる。
ここでは、半導体装置100は、図1に示した構成のボンディングパッド72に変えてパッド82を有する。パッド82は、ボンディングパッド72と同様パッドビア69とパッド配線75とにより構成される。パッドビア69およびパッド配線75を構成する材料は、アルミニウムを主成分とする金属材料や銅を主成分とする金属材料等、一般的なフリップチップ用のパッド材料により構成することができる。また、バンプ79は、金、金/ニッケル合金、半田等、一般的なフリップチップ用のバンプ材料により構成することができる。その他の構成は、図1に示した半導体装置100と同様とすることができる。
以下、参考形態の例を付記する。
1. 基板と、
前記基板上に形成され、低誘電率膜により構成された層間絶縁膜を少なくとも一部の層に含む多層配線構造と、
前記基板上の前記多層配線構造上に形成されたパッドと、を含み、
前記多層配線構造が、
前記パッドと平面視で重なる領域に形成された配線を含む配線用層間絶縁膜と、前記パッドと平面視で重なる領域に形成されたビアを含むビア用層間絶縁膜とが積層された下部多層配線構造と、
前記下部多層配線構造上に、前記パッドと平面視で重なる領域に形成された配線を含む配線用層間絶縁膜と、前記パッドと平面視で重なる領域に形成されたビアを含むビア用層間絶縁膜とが積層された上部多層配線構造と、
前記下部多層配線構造と前記上部多層配線構造との間に形成された中間絶縁膜と、
を含み、
前記パッドと平面視で重なる領域において、前記上部多層配線構造の前記配線および前記ビアは、前記パッドと接続して形成され、
前記パッドと平面視で重なる領域において、前記中間絶縁膜には、前記上部多層配線構造の前記配線または前記ビアと、前記下部多層配線構造の前記配線または前記ビアとを接続する導電材料が形成されず、
前記パッドと平面視で重なる領域において、前記下部多層配線構造に含まれる前記ビア用層間絶縁膜中の前記ビアが占める面積率が、前記上部多層配線構造に含まれる前記ビア用層間絶縁膜中の前記ビアが占める面積率よりも小さい半導体装置。
2. 1に記載の半導体装置において、
前記下部多層配線構造に含まれる前記ビア用層間絶縁膜の少なくとも一層は、前記低誘電率膜により構成された半導体装置。
3. 1または2に記載の半導体装置において、
前記低誘電率膜はポーラス膜である半導体装置。
4. 1から3いずれかに記載の半導体装置において、
前記パッドと平面視で重なる領域において、前記下部多層配線構造に含まれる前記ビア用層間絶縁膜中の前記ビアが占める面積率が、4%未満である半導体装置。
5. 1から4いずれかに記載の半導体装置において、
前記パッドと平面視で重なる領域において、前記上部多層配線構造に含まれる前記ビア用層間絶縁膜中の前記ビアが占める面積率が7%以上である半導体装置。
6. 1から5いずれかに記載の半導体装置において、
前記パッドと平面視で重なる領域において、前記上部多層配線構造に含まれる前記配線用層間絶縁膜中の前記配線が占める面積率が、70%以上である半導体装置。
7. 1から6いずれかに記載の半導体装置において、
前記下部多層配線構造は、複数の前記ビア用層間絶縁膜を含み、
前記パッドと平面視で重なる領域において、前記下部多層配線構造の前記複数のビア用層間絶縁膜のうち、前記基板に最も近い前記ビア用層間絶縁膜の前記ビアが占める面積率が他の前記ビア用層間絶縁膜の前記ビアが占める面積率より高い半導体装置。
2 層間絶縁膜
13 エッチング阻止膜
14、24、34、44 下部配線用層間絶縁膜
15、25、35、45 下部配線
16、26、36、46 バリアメタル膜
17、27、37、47 バリア絶縁膜
18、28、38 下部ビア用層間絶縁膜
19、29、39 下部ビア
48 中間ビア用層間絶縁膜
54、64 上部配線用層間絶縁膜
55、65 上部配線
56、66 バリアメタル膜
57、67 バリア絶縁膜
58 上部ビア用層間絶縁膜
59 上部ビア
68 ビア用層間絶縁膜
69 パッドビア
69b 外縁
70 バリアメタル膜
72 ボンディングパッド
73 保護絶縁膜
74 ポリイミド膜
74a 内縁
75 パッド配線
75a パッド内縁
75b パッド外縁
77 ボール
78 ボンディングワイヤ
79 バンプ
80 配線基板
82 パッド
90 下部多層配線構造
92 上部多層配線構造
94 パッド配置領域
100 半導体装置
Claims (7)
- 基板と、
前記基板上に形成され、低誘電率膜により構成された層間絶縁膜を少なくとも一部の層に含む多層配線構造と、
前記基板上の前記多層配線構造上に形成されたパッドと、を含み、
前記多層配線構造が、
前記パッドと平面視で重なる領域に形成された配線を含む配線用層間絶縁膜と、前記パッドと平面視で重なる領域に形成されたビアを含むビア用層間絶縁膜とのペアが複数積層された下部多層配線構造と、
前記下部多層配線構造上に、前記パッドと平面視で重なる領域に形成された配線を含む配線用層間絶縁膜と、前記パッドと平面視で重なる領域に形成されたビアを含むビア用層間絶縁膜とが積層された上部多層配線構造と、
前記下部多層配線構造と前記上部多層配線構造との間に形成された中間絶縁膜と、
を含み、
前記配線及び前記ビアは、前記配線用層間絶縁膜及び前記ビア用層間絶縁膜よりもヤング率が大きく、
前記パッドと平面視で重なる領域において、前記上部多層配線構造の前記配線および前記ビアは、前記パッドと接続して形成され、
前記パッドと平面視で重なる領域において、前記中間絶縁膜には、前記上部多層配線構造の前記配線または前記ビアと、前記下部多層配線構造の前記配線または前記ビアとを接続する導電材料が形成されず、
前記パッドと平面視で重なる領域において、前記下部多層配線構造に含まれる前記ビア用層間絶縁膜中の前記ビアが占める面積率が、前記上部多層配線構造に含まれる前記ビア用層間絶縁膜中の前記ビアが占める面積率よりも小さく、
前記パッドと平面視で重なる領域において、前記下部多層配線構造に含まれる前記ビア用層間絶縁膜中の前記ビアが占める面積率が、4%未満である半導体装置。 - 請求項1に記載の半導体装置において、
前記下部多層配線構造に含まれる前記ビア用層間絶縁膜の少なくとも一層は、前記低誘電率膜により構成された半導体装置。 - 請求項1または2に記載の半導体装置において、
前記低誘電率膜はポーラス膜である半導体装置。 - 請求項1から3いずれかに記載の半導体装置において、
前記配線及び前記ビアは、金属で構成され、
前記配線用層間絶縁膜及び前記ビア用層間絶縁膜は、ポーラスシリカ、ポーラスSiOC、ポーラスSiOCH、ポーラスでないSiOCやSiOCH、HSQ(Hydrogen Silsesquioxane)、ラダーオキサイド、アモルファスカーボンの中の少なくとも1つで構成される半導体装置。 - 請求項1から4いずれかに記載の半導体装置において、
前記パッドと平面視で重なる領域において、前記上部多層配線構造に含まれる前記ビア用層間絶縁膜中の前記ビアが占める面積率が7%以上である半導体装置。 - 請求項1から5いずれかに記載の半導体装置において、
前記パッドと平面視で重なる領域において、前記上部多層配線構造に含まれる前記配線用層間絶縁膜中の前記配線が占める面積率が、70%以上である半導体装置。 - 請求項1から6いずれかに記載の半導体装置において、
前記下部多層配線構造は、複数の前記ビア用層間絶縁膜を含み、
前記パッドと平面視で重なる領域において、前記下部多層配線構造の前記複数のビア用層間絶縁膜のうち、前記基板に最も近い前記ビア用層間絶縁膜の前記ビアが占める面積率が他の前記ビア用層間絶縁膜の前記ビアが占める面積率より高い半導体装置。
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WO2005096364A1 (ja) | 2004-03-31 | 2005-10-13 | Nec Corporation | 半導体装置及びその製造方法 |
JP4610008B2 (ja) * | 2005-09-26 | 2011-01-12 | ルネサスエレクトロニクス株式会社 | 半導体装置 |
CN1988146A (zh) * | 2005-12-22 | 2007-06-27 | 中芯国际集成电路制造(上海)有限公司 | 哑元图案和机械增强低k介电材料的制造方法 |
US7253531B1 (en) * | 2006-05-12 | 2007-08-07 | Taiwan Semiconductor Manufacturing Co., Ltd. | Semiconductor bonding pad structure |
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2010
- 2010-05-04 US US12/662,807 patent/US8310056B2/en active Active
- 2010-05-12 JP JP2010110440A patent/JP5710892B2/ja not_active Expired - Fee Related
- 2010-05-31 CN CN2010101949557A patent/CN101937893B/zh not_active Expired - Fee Related
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JP2011009713A (ja) | 2011-01-13 |
US20100301488A1 (en) | 2010-12-02 |
CN101937893B (zh) | 2012-10-03 |
US8310056B2 (en) | 2012-11-13 |
CN101937893A (zh) | 2011-01-05 |
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