JP2005203779A - 犠牲無機ポリマ金属間誘電体を用いたダマシン配線およびビア・ライナ - Google Patents
犠牲無機ポリマ金属間誘電体を用いたダマシン配線およびビア・ライナ Download PDFInfo
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- JP2005203779A JP2005203779A JP2005003396A JP2005003396A JP2005203779A JP 2005203779 A JP2005203779 A JP 2005203779A JP 2005003396 A JP2005003396 A JP 2005003396A JP 2005003396 A JP2005003396 A JP 2005003396A JP 2005203779 A JP2005203779 A JP 2005203779A
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- dielectric
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- 229920000592 inorganic polymer Polymers 0.000 title 1
- 229910052751 metal Inorganic materials 0.000 claims abstract description 170
- 239000002184 metal Substances 0.000 claims abstract description 170
- 238000000034 method Methods 0.000 claims abstract description 97
- 238000005530 etching Methods 0.000 claims abstract description 37
- 125000006850 spacer group Chemical group 0.000 claims abstract description 34
- 238000000151 deposition Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 28
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 25
- 238000005229 chemical vapour deposition Methods 0.000 claims description 23
- 239000010949 copper Substances 0.000 claims description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 17
- 229910052802 copper Inorganic materials 0.000 claims description 17
- 229920000642 polymer Polymers 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 229910052799 carbon Inorganic materials 0.000 claims description 13
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 claims description 13
- 238000005240 physical vapour deposition Methods 0.000 claims description 12
- 239000005368 silicate glass Substances 0.000 claims description 7
- 239000010931 gold Substances 0.000 claims description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 238000004518 low pressure chemical vapour deposition Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 abstract description 203
- 239000011229 interlayer Substances 0.000 abstract description 8
- 239000003989 dielectric material Substances 0.000 description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 22
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 17
- 229910052710 silicon Inorganic materials 0.000 description 17
- 239000010703 silicon Substances 0.000 description 17
- 238000004544 sputter deposition Methods 0.000 description 14
- 229920002120 photoresistant polymer Polymers 0.000 description 12
- 229910052581 Si3N4 Inorganic materials 0.000 description 11
- 239000003870 refractory metal Substances 0.000 description 11
- 235000012239 silicon dioxide Nutrition 0.000 description 11
- 239000000377 silicon dioxide Substances 0.000 description 11
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 11
- 239000000126 substance Substances 0.000 description 10
- 239000006117 anti-reflective coating Substances 0.000 description 9
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 9
- 230000004888 barrier function Effects 0.000 description 7
- 150000004767 nitrides Chemical class 0.000 description 7
- 238000001020 plasma etching Methods 0.000 description 7
- 101000793686 Homo sapiens Azurocidin Proteins 0.000 description 6
- 238000000206 photolithography Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
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- 238000005268 plasma chemical vapour deposition Methods 0.000 description 4
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- 239000011248 coating agent Substances 0.000 description 3
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- 229910010271 silicon carbide Inorganic materials 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 230000001010 compromised effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000007521 mechanical polishing technique Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 238000000277 atomic layer chemical vapour deposition Methods 0.000 description 1
- 238000000231 atomic layer deposition Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229940104869 fluorosilicate Drugs 0.000 description 1
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- 150000004760 silicates Chemical class 0.000 description 1
- 238000000992 sputter etching Methods 0.000 description 1
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Abstract
【解決手段】下側低k誘電体32内に位置する第1の金属線26を有する下側金属配線層を提供するステップと、下側金属配線層の上に上側低k誘電体6を堆積させるステップと、上側低k誘電体の少なくとも一部分をエッチングして、第1の金属線までの少なくとも1つのビア24を形成するステップと、上側低k誘電体の少なくとも1つのビアの中に剛性誘電体側壁スペーサ12を形成するステップと、上側低k誘電体の少なくとも一部分の中に第2の金属線25を形成するステップとを含む方法を提供する。
【選択図】図2
Description
下側低k誘電体内に位置する第1の金属線を有する下側金属配線層を準備するステップと、
下側金属配線層の上に上側低k誘電体を堆積するステップと、
上側低k誘電体の少なくとも一部分をエッチングして、第1の金属線への少なくとも1つのビアを形成するステップと、
上側低k誘電体の少なくとも1つのビアの中に剛性誘電体側壁スペーサを形成するステップと、
上側低k誘電体の少なくとも一部分の中に第2の金属線を形成するステップとを含む。
下側低k誘電体内に位置する第1の金属線を含む下側金属配線層と、
下側金属配線層の上に位置する、上側低k誘電体内に位置する第2の金属線を含む上側金属配線層と、
上側低k誘電体の一部分を通って下側金属配線層と上側金属配線層とを電気的に接続する複数のビアとを含み、該複数のビアは、1組の剛性誘電体側壁スペーサを含む。
下側低k誘電体内に位置する第1の金属線を有する下側金属配線層を準備するステップと、
下側金属配線層の上に機械的剛性誘電体を堆積するステップと、
機械的剛性誘電体を通して第1の金属線の一部分まで少なくとも1つのビアを形成するステップと、
上側低k誘電体内に位置する、ビアを介して第1の金属線と電気的に接続された第2の金属線を有する上側金属配線層を形成するステップとを含む相互接続構造を形成する方法であって、ビアが、機械的剛性誘電体と実質的に一致する熱膨張係数を有する金属を含む。
下側低k誘電体内に位置する第1の金属線を含む下側金属配線層と、
下側金属配線層上に位置する機械的剛性誘電体であり、複数の金属ビアを含み、該複数の金属ビアが該機械的剛性誘電体と実質的に一致する熱膨張係数を有する機械的剛性誘電体と、
機械的剛性誘電体の上に位置する、上側低k誘電体内に位置する第2の金属線を含む上側金属配線層とを含み、該複数の金属ビアは、下側金属配線層と上側金属配線層とを電気的に接続する。
6 低k誘電体層
7 上側エッチ・ストップ層
8 レジスト
9 反射防止コーティング層
10 相互接続構造
11 剛性誘電体ライナ
12 剛性誘電体側壁スペーサ
13 金属ライナ
16 金属ビア
23 上側低k誘電体層
24 ビア相互接続
25 第2の金属線
26 第1の金属線
27 共形剛性ライナ
28 犠牲剛性側壁スペーサ
31 下側金属配線層
32 低k誘電体層
33 剛性誘電体層
34 下側エッチ・ストップ層
35 機械的剛性誘電体層
36 上側剛性絶縁層
37 誘電体キャップ層
38 反射防止コーティング
39 ビア・パターン・レジスト
40 金属線パターン・レジスト
45 上側金属配線層
Claims (24)
- 相互接続構造を形成する方法であって、
下側低k誘電体内に位置する第1の金属線を有する下側金属配線層を準備するステップと、
前記下側金属配線層の上に上側低k誘電体を堆積するステップと、
前記上側低k誘電体の少なくとも一部分をエッチングして、前記第1の金属線への少なくとも1つのビアを形成するステップと、
前記上側低k誘電体の前記少なくとも1つのビアの中に剛性誘電体側壁スペーサを形成するステップと、
前記上側低k誘電体の前記少なくとも一部分の中に第2の金属線を形成するステップとを含む方法。 - 前記上側低k誘電体および前記下側低k誘電体が、約1.0から約3.5の範囲の誘電率を有する材料を含む、請求項1に記載の方法。
- 前記上側低k誘電体および前記下側低k誘電体が、低kポリマーまたは低k炭素ドープ酸化物を含む、請求項1に記載の方法。
- 前記剛性誘電体側壁スペーサが、SiCH、SiC、SiNH、SiNまたはSiO2を含む、請求項1に記載の方法。
- 剛性誘電体側壁スペーサを形成する前記ステップが、
前記上側低k誘電体の上および前記少なくとも1つのビアの中に共形剛性誘電体ライナを堆積するステップと、
前記共形剛性誘電体ライナの水平表面をエッチングして、前記少なくとも1つのビアの垂直側壁上に位置する前記剛性誘電体スペーサを形成するステップとをさらに含む、請求項4に記載の方法。 - 共形剛性誘電体ライナを堆積する前記ステップが、物理的気相堆積法(PVD)、プラズマ強化化学的気相堆積法(PECVD)、高密度プラズマ化学的気相堆積法(HDPCVD)、または低圧化学的気相堆積法(LPCVD)をさらに含む、請求項5に記載の方法。
- 前記共形剛性誘電体ライナが、約10nmから約100nmの範囲の厚さを有する、請求項6に記載の方法。
- 前記共形剛性誘電体ライナの水平表面をエッチングする前記ステップが、異方性エッチング・プロセスをさらに含む、請求項7に記載の方法。
- 前記下側金属配線層が、前記下側低k誘電体の上に堆積される剛性絶縁層をさらに含み、前記剛性絶縁層の材料が、SiC、SiO2およびSi3N4からなる群から選択される、請求項8に記載の方法。
- 下側低k誘電体内に位置する第1の金属線を有する下側金属配線層を準備するステップと、
前記下側金属配線層の上に機械的剛性誘電体を堆積するステップと、
前記機械的剛性誘電体を通して前記第1の金属線の一部分まで少なくとも1つのビアを形成するステップと、
上側低k誘電体内に位置する、前記ビアを介して前記第1の金属線と電気的に接続された第2の金属線を有する上側金属配線層を形成するステップと
を含む相互接続構造を形成する方法であって、前記ビアが、前記機械的剛性誘電体と実質的に一致する熱膨張係数を有する金属を含む方法。 - 前記機械的剛性誘電体が、約0.1ppm/℃から約5.0ppm/℃の範囲の熱膨張係数を有する、請求項10に記載の方法。
- 前記機械的剛性誘電体が、SiO2、SiCOH、またはドープしたケイ酸塩ガラスを含む、請求項10に記載の方法。
- 前記機械的剛性誘電体が、約100nmから約1000nmの範囲の厚さを有する、請求項10に記載の方法。
- 前記上側低k誘電体および前記下側低k誘電体が、約3.5未満の誘電率を有する材料を含む、請求項10に記載の方法。
- 前記上側低k誘電体および前記下側低k誘電体が、低kポリマーまたは低k炭素ドープ酸化物を含む、請求項14に記載の方法。
- 前記低kポリマーが、炭素を約95%含むB段階ポリマーである、請求項15に記載の方法。
- 前記低k炭素ドープ酸化物がSiCOHである、請求項15に記載の方法。
- 前記第2の金属線、前記第1の金属線、または前記第2の金属線と前記第1の金属線の組合せが、銅、アルミニウム、銀、金またはそれらの合金を含む、請求項10に記載の方法。
- 下側低k誘電体内に位置する第1の金属線を含む下側金属配線層と、
前記下側金属配線層の上に位置する、上側低k誘電体内に位置する第2の金属線を含む上側金属配線層と、
前記上側低k誘電体の一部分を通って前記下側金属配線層と前記上側金属配線層とを電気的に接続する複数のビアとを含み、前記複数のビアが1組の剛性誘電体側壁スペーサを含む、相互接続構造。 - 前記1組の剛性誘電体側壁スペーサが、SiCH、SiC、SiNH、SiNまたはSiO2を含む、請求項19に記載の相互接続構造。
- 前記1組の剛性誘電体側壁スペーサがそれぞれ、約10nmから約100nmの範囲の厚さを有する、請求項20に記載の相互接続構造。
- 下側低k誘電体内に位置する第1の金属線を含む下側金属配線層と、
前記下側金属配線層上に位置する、複数の金属ビアを含む機械的剛性誘電体と、
前記機械的剛性誘電体の上に位置する、上側低k誘電体内に位置する第2の金属線を含む上側金属配線層とを含み、前記複数の金属ビアが前記下側金属配線層と前記上側金属配線層とを電気的に接続する、相互接続構造。 - 前記機械的剛性誘電体が、SiO2、SiCOH、またはドープしたケイ酸塩ガラスを含む、請求項22に記載の相互接続構造。
- 前記複数の金属ビアが、前記機械的剛性誘電体と一致する熱膨張係数を有する、請求項22に記載の相互接続構造。
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JP2008294040A (ja) * | 2007-05-22 | 2008-12-04 | Rohm Co Ltd | 半導体装置 |
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US20070087551A1 (en) | 2007-04-19 |
US7847409B2 (en) | 2010-12-07 |
US8053901B2 (en) | 2011-11-08 |
US20110042826A1 (en) | 2011-02-24 |
CN100375266C (zh) | 2008-03-12 |
US20080036092A1 (en) | 2008-02-14 |
CN1641856A (zh) | 2005-07-20 |
US7169698B2 (en) | 2007-01-30 |
US20050153505A1 (en) | 2005-07-14 |
JP4162241B2 (ja) | 2008-10-08 |
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