JP2010508673A - 終端アルミニウム金属層のないメタライゼーション層積層体 - Google Patents
終端アルミニウム金属層のないメタライゼーション層積層体 Download PDFInfo
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- JP2010508673A JP2010508673A JP2009535280A JP2009535280A JP2010508673A JP 2010508673 A JP2010508673 A JP 2010508673A JP 2009535280 A JP2009535280 A JP 2009535280A JP 2009535280 A JP2009535280 A JP 2009535280A JP 2010508673 A JP2010508673 A JP 2010508673A
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- Prior art keywords
- layer
- forming
- bump
- nickel
- metallization layer
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- 238000001465 metallisation Methods 0.000 title claims abstract description 94
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 103
- 230000008569 process Effects 0.000 claims abstract description 71
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims description 66
- 238000002161 passivation Methods 0.000 claims description 57
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 52
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 43
- 229910052802 copper Inorganic materials 0.000 claims description 43
- 239000010949 copper Substances 0.000 claims description 43
- 239000004065 semiconductor Substances 0.000 claims description 35
- 229910052759 nickel Inorganic materials 0.000 claims description 26
- 238000000151 deposition Methods 0.000 claims description 15
- 238000000059 patterning Methods 0.000 claims description 15
- 238000005530 etching Methods 0.000 claims description 11
- 239000003989 dielectric material Substances 0.000 claims description 10
- 230000008021 deposition Effects 0.000 claims description 8
- 239000010936 titanium Substances 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 238000005234 chemical deposition Methods 0.000 claims description 5
- 150000002816 nickel compounds Chemical class 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 32
- 239000002184 metal Substances 0.000 abstract description 32
- 230000004888 barrier function Effects 0.000 abstract description 16
- 230000015572 biosynthetic process Effects 0.000 abstract description 15
- 150000002739 metals Chemical class 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 208
- 229910000679 solder Inorganic materials 0.000 description 42
- 239000000758 substrate Substances 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 15
- 230000006870 function Effects 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 238000004544 sputter deposition Methods 0.000 description 9
- 229910052581 Si3N4 Inorganic materials 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 7
- 238000009713 electroplating Methods 0.000 description 7
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 7
- 239000004642 Polyimide Substances 0.000 description 6
- 238000000206 photolithography Methods 0.000 description 6
- 229920001721 polyimide Polymers 0.000 description 6
- 239000011241 protective layer Substances 0.000 description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 6
- 229910010271 silicon carbide Inorganic materials 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000004377 microelectronic Methods 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 229910052715 tantalum Inorganic materials 0.000 description 4
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 4
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004070 electrodeposition Methods 0.000 description 2
- 238000007772 electroless plating Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002120 photoresistant polymer Polymers 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 230000003405 preventing effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910021341 titanium silicide Inorganic materials 0.000 description 2
- MAKDTFFYCIMFQP-UHFFFAOYSA-N titanium tungsten Chemical compound [Ti].[W] MAKDTFFYCIMFQP-UHFFFAOYSA-N 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- -1 argon ions Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 150000001844 chromium Chemical class 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000010849 ion bombardment Methods 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000005258 radioactive decay Effects 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- VSSLEOGOUUKTNN-UHFFFAOYSA-N tantalum titanium Chemical compound [Ti].[Ta] VSSLEOGOUUKTNN-UHFFFAOYSA-N 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
- WQJQOUPTWCFRMM-UHFFFAOYSA-N tungsten disilicide Chemical compound [Si]#[W]#[Si] WQJQOUPTWCFRMM-UHFFFAOYSA-N 0.000 description 1
- 229910021342 tungsten silicide Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000007704 wet chemistry method Methods 0.000 description 1
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Abstract
Description
また、最終パッシベーション層の、その下のメタライゼーション層積層体との密着性が改良されているため、特に開口領域およびウェハスクラブレーンによって発生するアルミニウムピッティングおよびパッシベーション層の層剥離などの悪影響を大きく低減させることができる。また、大幅なコスト節約を達成することができるように、非常に効率的なバンプ構造を形成するためのプロセスフロー全体が、大幅に簡略化され、材料を大幅に削減することができる。
また、高度なアプリケーションにおいては、ソルダーバンプに非常に高価な放射能低減鉛を使用する必要があったが、ソルダーバンプのサイズを縮小できることにより、生産コストを大きく削減することができる。また、複雑なアルミニウムの堆積とパターニングプロセスを省略できることで、サイクルタイムを短縮することができる。ニッケル含有層などの中間材料を設けることにより、バンプ構造の熱的性能および電気的性能を実質的に低下させることなく、適切なアンダーバンプ材料およびバンプ材料の選択におけるフレキシビリティが高くなる。中間層は電気化学的成膜法に基づいて効率的に形成することができ、これにより、後の堆積手法との高いプロセスの互換性が与えられる。
Claims (15)
- 第1パッシベーション層(203)によって横方向に境界を定められ、コンタクト表面(202A)を有するコンタクト領域(202)を有するメタライゼーション層(207)と、
前記第1パッシベーション層(203)の上に形成され、前記コンタクト領域(202A)の少なくとも一部を露出させている最終パッシベーション層(209)と、
前記コンタクト表面(202A)と前記最終パッシベーション層(209)の一部との上に形成されたアンダーバンプメタライゼーション層(211)と、
前記アンダーバンプメタライゼーション層(211)上に形成されたニッケル含有中間層(216)と、
前記ニッケル含有中間層(216)上に形成されたバンプ(212)と、を有する半導体デバイス。 - 前記アンダーバンプメタライゼーション層(211)は実質的にアルミニウムを含まない請求項1に記載の半導体デバイス。
- 前記アンダーバンプメタライゼーション層(211)は、前記第1パッシベーション層(203)の一部と前記最終パッシベーション層(209)の一部との上に形成されている請求項2に記載の半導体デバイス。
- 前記コンタクト表面(202A)は、銅含有表面である請求項1に記載の半導体デバイス。
- 前記ニッケル含有中間層(216)はニッケル化合物を含む請求項1に記載の半導体デバイス。
- 前記ニッケル含有中間層(216)は、少なくとも1層のニッケル層および少なくとも1層の銅含有層の積層体を有する請求項1に記載の半導体デバイス。
- 前記アンダーバンプメタライゼーション層(211)は、チタンを含む第1の層(211A)および銅を含む第2の層(211B)を有し、前記第1の層(211A)は前記コンタクト表面(202A)上に形成されている請求項1に記載の半導体デバイス。
- 半導体デバイスの最終メタライゼーション層(207)のコンタクト領域(202)の露出されたコンタクト表面(202A)上にアンダーバンプメタライゼーション層(211)を形成するステップと、
前記アンダーバンプメタライゼーション層(211)上にニッケル含有中間層(216)を形成するステップと、
前記コンタクト表面(202A)の上の前記ニッケル含有中間層(216)上にバンプ(212)を形成するステップと、
前記バンプ(212)の存在下で前記アンダーバンプメタライゼーション層(211)をパターニングするステップと、を有する方法。 - 前記コンタクト表面(202A)と前記コンタクト領域(202A)を囲む誘電材料との上に第1パッシベーション層(203)を形成するステップと、前記第1パッシベーション層(203)上に最終パッシベーション材料(209)を形成するステップと、前記コンタクト表面(202A)の一部を露出させるために前記最終パッシベーション材料(209)および前記第1パッシベーション層(203)をパターニングするステップと、を有する請求項8に記載の方法。
- 前記最終パッシベーション材料(209)および前記第1パッシベーション層(203)をパターニングステップは、前記最終パッシベーション層(209)をパターニングするステップと、前記パターニングされた最終パッシベーション層(209)をエッチングマスクとして使用して前記第1パッシベーション層(203)をパターニングするステップと、を有する請求項9に記載の方法。
- 前記第1パッシベーション層(203)を形成するステップは、少なくとも2つの異なる材料層を堆積させるステップを有する請求項9に記載の方法。
- 前記ニッケル含有中間層(216)を形成するステップは、湿式化学成膜プロセスによってニッケル含有中間層を形成するステップを有する請求項9に記載の方法。
- 前記バンプ(212)を形成するステップは、前記アンダーバンプメタライゼーション層(211)上に堆積マスクを形成するステップと、前記堆積マスクを基に前記ニッケル含有中間層(216)および前記バンプ(212)を形成するステップと、を有する請求項8に記載の方法。
- 前記バンプ(212)を形成するステップは、前記アンダーバンプメタライゼーション層(207)上に前記ニッケル含有中間層(216)を形成するステップと、堆積マスクを基に前記バンプ(212)を形成するステップと、を有する請求項8に記載の方法。
- 共通のプロセスシーケンスにおいて前記コンタクト表面(202A)を露出させ、前記アンダーバンプメタライゼーション層(207)を形成するステップを更に有する請求項8に記載の方法。
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DE102006051491A DE102006051491A1 (de) | 2006-10-31 | 2006-10-31 | Metallisierungsschichtstapel mit einer Aluminiumabschlussmetallschicht |
US11/752,519 US20080099913A1 (en) | 2006-10-31 | 2007-05-23 | Metallization layer stack without a terminal aluminum metal layer |
PCT/US2007/022683 WO2008054680A2 (en) | 2006-10-31 | 2007-10-26 | A metallization layer stack without a terminal aluminum metal layer |
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Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20130403 |