JP3954998B2 - 半導体装置およびその製造方法 - Google Patents
半導体装置およびその製造方法 Download PDFInfo
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- JP3954998B2 JP3954998B2 JP2003291642A JP2003291642A JP3954998B2 JP 3954998 B2 JP3954998 B2 JP 3954998B2 JP 2003291642 A JP2003291642 A JP 2003291642A JP 2003291642 A JP2003291642 A JP 2003291642A JP 3954998 B2 JP3954998 B2 JP 3954998B2
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- tantalum
- wiring layer
- interlayer insulating
- insulating film
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- 239000004065 semiconductor Substances 0.000 title claims description 51
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 239000010410 layer Substances 0.000 claims description 237
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 70
- 229910052715 tantalum Inorganic materials 0.000 claims description 65
- 239000011229 interlayer Substances 0.000 claims description 52
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 41
- 239000010931 gold Substances 0.000 claims description 41
- 229910052737 gold Inorganic materials 0.000 claims description 41
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 claims description 28
- 230000004888 barrier function Effects 0.000 claims description 25
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 21
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 18
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 17
- 238000004544 sputter deposition Methods 0.000 claims description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 15
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 15
- 229920001721 polyimide Polymers 0.000 claims description 15
- 239000009719 polyimide resin Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 13
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 239000002344 surface layer Substances 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims 1
- 239000010408 film Substances 0.000 description 75
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 22
- 229910052782 aluminium Inorganic materials 0.000 description 22
- 230000007797 corrosion Effects 0.000 description 11
- 238000005260 corrosion Methods 0.000 description 11
- 238000002161 passivation Methods 0.000 description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 5
- 229920005591 polysilicon Polymers 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 4
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 4
- 238000000576 coating method Methods 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000005380 borophosphosilicate glass Substances 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 239000005368 silicate glass Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
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- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
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Description
12 フィールド酸化膜
13 層間絶縁膜
14 アルミニウム配線層
15 ポリシリコン配線
16 層間絶縁膜
16S 窒化シリコン膜
16U USG層
18 ポリイミド樹脂膜
19 金配線層
19S シード層
20 バリア層
21 第1タンタル層
22 第2タンタル層
23 窒化タンタル層
24 レジスト
24a 開口
25 窒化シリコン膜
26 有機SOG層
H コンタクト孔
Claims (10)
- 半導体基板上に形成された第1配線層と、
この第1配線層上に形成された層間絶縁膜と、
この層間絶縁膜上に形成され、金層からなる最上層配線層としての第2配線層と、
上記層間絶縁膜に形成された層間接続用開口内において上記第1配線層と第2配線層と
の間に介在され、上記第1配線層に接触して接触抵抗を低減させる第1タンタル層、上記第2配線層に接触して接着強度を向上させる第2タンタル層、および上記第1タンタル層と第2タンタル層との間に介在された窒化タンタル層を有するバリア層とを含むことを特徴とする半導体装置。 - 上記窒化タンタル層は、上記第1タンタル層側における窒素原子密度が、上記第2タンタル層側における窒素原子密度よりも低くなるような窒素原子密度分布を有していることを特徴とする請求項1記載の半導体装置。
- 上記層間絶縁膜は、その表層部全体を覆う窒化シリコン膜を含むことを特徴とする請求項1または2に記載の半導体装置。
- 上記第2配線層および上記層間絶縁膜を覆うポリイミド樹脂膜をさらに含むことを特徴とする請求項1ないし3のいずれかに記載の半導体装置。
- 上記第2配線層および上記層間絶縁膜を覆う窒化シリコン膜をさらに含むことを特徴とする請求項1ないし3のいずれかに記載の半導体装置。
- 層間絶縁膜を挟んで形成した第1配線層および第2配線層を上記層間絶縁膜に形成された層間接続用開口を介して電気接続する構成の半導体装置を製造するための方法であって、
半導体基板上に上記第1配線層を形成する工程と、
この第1配線層を覆うように上記層間絶縁膜を形成する工程と、
この層間絶縁膜の所定位置に上記第1配線層を露出させる上記層間接続用開口を形成する工程と、
上記層間接続用開口内に、上記第1配線層に接触して接触抵抗を低減させる第1タンタル層、上記第2配線層に接触して接着強度を向上させる第2タンタル層、および上記第1タンタル層と第2タンタル層との間に介在された窒化タンタル層を有する積層構造のバリア層を形成する工程と、
上記層間絶縁膜上に、上記バリア層に接するとともに、金層からなる最上層配線層としての上記第2配線層を形成する工程とを含むことを特徴とする半導体装置の製造方法。 - 上記バリア層を形成する工程は、第1タンタル層、窒化タンタル層および第2タンタル層を連続スパッタ法により形成する連続スパッタ工程を含み、
この連続スパッタ工程は、処理室内でタンタルをターゲットとしたスパッタによって第1タンタル層を形成する工程と、その後、窒素ガスを処理室内に導入して窒素雰囲気中でタンタルをターゲットとしたスパッタを行って窒化タンタル層を形成する工程と、その後、処理室から窒素ガスを排除してタンタルをターゲットとしたスパッタによって第2タンタル層を形成する工程とを含むことを特徴とする請求項6記載の半導体装置の製造方法。 - 上記層間絶縁膜を形成する工程は、その表層部全体を覆う窒化シリコン膜を形成する工程を含むことを特徴とする請求項6または7に記載の半導体装置の製造方法。
- 上記第2配線層および上記層間絶縁膜を覆うポリイミド樹脂膜を形成する工程をさらに含むことを特徴とする請求項6ないし8のいずれかに記載の半導体装置の製造方法。
- 上記第2配線層および上記層間絶縁膜を覆う窒化シリコン膜を形成する工程をさらに含むことを特徴とする請求項6ないし8のいずれかに記載の半導体装置の製造方法。
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CNB2004100559337A CN100397636C (zh) | 2003-08-11 | 2004-07-30 | 半导体装置及其制造方法 |
US10/912,218 US7372163B2 (en) | 2003-08-11 | 2004-08-06 | Semiconductor device and production method therefor |
KR1020040062500A KR20050019033A (ko) | 2003-08-11 | 2004-08-09 | 반도체 장치 및 그 제조 방법 |
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US8592977B2 (en) * | 2006-06-28 | 2013-11-26 | Megit Acquisition Corp. | Integrated circuit (IC) chip and method for fabricating the same |
TWI460820B (zh) * | 2006-06-28 | 2014-11-11 | Qualcomm Inc | 積體電路(ic)晶片及其製程 |
US8421227B2 (en) * | 2006-06-28 | 2013-04-16 | Megica Corporation | Semiconductor chip structure |
US8193636B2 (en) * | 2007-03-13 | 2012-06-05 | Megica Corporation | Chip assembly with interconnection by metal bump |
JP5369544B2 (ja) * | 2008-08-29 | 2013-12-18 | 富士通株式会社 | 半導体装置およびその製造方法 |
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US6521532B1 (en) * | 1999-07-22 | 2003-02-18 | James A. Cunningham | Method for making integrated circuit including interconnects with enhanced electromigration resistance |
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US6376370B1 (en) * | 2000-01-18 | 2002-04-23 | Micron Technology, Inc. | Process for providing seed layers for using aluminum, copper, gold and silver metallurgy process for providing seed layers for using aluminum, copper, gold and silver metallurgy |
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US6605874B2 (en) * | 2001-12-19 | 2003-08-12 | Intel Corporation | Method of making semiconductor device using an interconnect |
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