JP5138248B2 - 半導体装置及びその製造方法 - Google Patents
半導体装置及びその製造方法 Download PDFInfo
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- JP5138248B2 JP5138248B2 JP2007076845A JP2007076845A JP5138248B2 JP 5138248 B2 JP5138248 B2 JP 5138248B2 JP 2007076845 A JP2007076845 A JP 2007076845A JP 2007076845 A JP2007076845 A JP 2007076845A JP 5138248 B2 JP5138248 B2 JP 5138248B2
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- 239000004065 semiconductor Substances 0.000 title claims description 89
- 238000004519 manufacturing process Methods 0.000 title claims description 36
- 229910052751 metal Inorganic materials 0.000 claims description 228
- 239000002184 metal Substances 0.000 claims description 228
- 238000007747 plating Methods 0.000 claims description 179
- 239000010949 copper Substances 0.000 claims description 145
- 239000011651 chromium Substances 0.000 claims description 82
- 239000000758 substrate Substances 0.000 claims description 62
- 229910045601 alloy Inorganic materials 0.000 claims description 41
- 239000000956 alloy Substances 0.000 claims description 41
- 239000011347 resin Substances 0.000 claims description 41
- 229920005989 resin Polymers 0.000 claims description 41
- 239000013078 crystal Substances 0.000 claims description 37
- 229920002577 polybenzoxazole Polymers 0.000 claims description 30
- 230000015572 biosynthetic process Effects 0.000 claims description 26
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 20
- 229910052804 chromium Inorganic materials 0.000 claims description 20
- 229910052802 copper Inorganic materials 0.000 claims description 20
- 238000004544 sputter deposition Methods 0.000 claims description 20
- 229910000838 Al alloy Inorganic materials 0.000 claims description 18
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 13
- 229920001721 polyimide Polymers 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 239000009719 polyimide resin Substances 0.000 claims description 9
- 239000012528 membrane Substances 0.000 claims description 2
- 150000002632 lipids Chemical class 0.000 claims 2
- 239000010410 layer Substances 0.000 description 636
- 238000000034 method Methods 0.000 description 43
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 32
- 229910052710 silicon Inorganic materials 0.000 description 32
- 239000010703 silicon Substances 0.000 description 32
- 238000006243 chemical reaction Methods 0.000 description 27
- 229910052581 Si3N4 Inorganic materials 0.000 description 14
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 14
- 238000009713 electroplating Methods 0.000 description 13
- 238000000206 photolithography Methods 0.000 description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 239000010931 gold Substances 0.000 description 12
- 229910052814 silicon oxide Inorganic materials 0.000 description 10
- 230000004888 barrier function Effects 0.000 description 9
- 238000005530 etching Methods 0.000 description 9
- 239000000470 constituent Substances 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 239000010936 titanium Substances 0.000 description 8
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 7
- 238000005229 chemical vapour deposition Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 238000001312 dry etching Methods 0.000 description 5
- 229910052737 gold Inorganic materials 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 4
- 238000000059 patterning Methods 0.000 description 4
- 229920002120 photoresistant polymer Polymers 0.000 description 4
- 230000000750 progressive effect Effects 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 238000001039 wet etching Methods 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 2
- 239000003870 refractory metal Substances 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- 239000011135 tin Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 description 1
- -1 aluminum-silicon-copper Chemical compound 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000005360 phosphosilicate glass Substances 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- MAKDTFFYCIMFQP-UHFFFAOYSA-N titanium tungsten Chemical compound [Ti].[W] MAKDTFFYCIMFQP-UHFFFAOYSA-N 0.000 description 1
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Description
尚、図1(A)では、メッキ用金属層18としてCu層を形成し、当該Cu層上面にCuメッキ層19を形成する場合を図示している。そのため、メッキ用金属層18としてのCu層は、実質、電解メッキ法によりCuメッキ層19と置き換わるため、Cuメッキ層19と一体に図示している。また、Cuメッキ層19に換えて、メッキ用金属層18上に、例えば、Auまたは半田から成るバンプ電極を形成する場合でもよい。
3 パッド電極
4 第2の絶縁層
5 開口領域
9 金属層
10 凹部
16 スピンコート樹脂膜
18 メッキ用金属層
19 Cuメッキ層
22 バンプ電極
Claims (14)
- 半導体基板上に絶縁処理され設けられるパッド電極と、
前記パッド電極を被覆するように形成される絶縁層と、
前記パッド電極の表面を露出するように、前記絶縁層に設けられる複数の開口領域と、
前記絶縁層表面から前記開口領域内に渡り形成され、前記パッド電極と接続し、前記開口領域上に複数の凹部が形成される金属層と、
前記開口領域の形成領域上の前記金属層が露出するように、前記絶縁層上を被覆するシールド層と、
前記開口領域の形成領域上の前記金属層が露出するように、前記シールド層上面を被覆する樹脂膜と、
前記露出する金属層上面を被覆し、前記樹脂膜の上面まで形成されるメッキ用金属層と、
前記メッキ用金属層上に形成される電極とを有する半導体装置において、
前記メッキ用金属層は、前記凹部の段差の底面の外周部またはその近傍領域にて、他の領域の前記メッキ用金属層よりも薄く形成される領域を有し、前記薄く形成される領域では、前記金属層を構成する金属と前記電極を構成する金属とを少なくとも含む合金層が生成されていることを特徴とする半導体装置。 - 前記メッキ用金属層はクロム層を有し、
前記薄く形成される領域では、前記クロム層の結晶粒子間隔が、前記他の領域のクロム層の結晶粒子間隔よりも広くなり、前記合金層は、前記結晶粒子間に生成されていることを特徴とする請求項1に記載の半導体装置。 - 前記開口領域における前記絶縁層と前記パッド電極との境界領域では、前記パッド電極の表面と前記絶縁層の傾斜面との成す角度が、70〜90度となることを特徴とする請求項1または請求項2に記載の半導体装置。
- 前記金属層は、アルミニウム層またはアルミニウム合金層から成り、前記電極は、銅層と、前記銅層上に形成されるバンプ電極とを有することを特徴とする請求項1または請求項2に記載の半導体装置。
- 前記樹脂膜は、ポリベンズオキサゾール膜またはポリイミド樹脂膜から成ることを特徴とする請求項1または請求項2に記載の半導体装置。
- 半導体基板上に絶縁処理され設けられるパッド電極と、
前記パッド電極を被覆するように形成される絶縁層と、
前記パッド電極の表面を露出するように、前記絶縁層に設けられる複数の開口領域と、
前記開口領域が露出するように、前記絶縁層上面を被覆するシールド層と、
前記開口領域が露出するように、前記シールド層上面を被覆する樹脂膜と、
前記開口領域から露出するパッド電極上面を被覆し、前記樹脂膜の上面まで形成されるメッキ用金属層と、
前記メッキ用金属層上に形成された電極とを有する半導体装置であり、
前記メッキ用金属層は、前記開口領域における前記絶縁層と前記パッド電極との境界領域またはその近傍領域にて、他の領域の前記メッキ用金属層よりも薄く形成される領域を有し、前記薄く形成される領域では、前記パッド電極を構成する金属と前記電極を構成する金属とを少なくとも含む合金層が生成されていることを特徴とする半導体装置。 - 前記メッキ用金属層はクロム層を有し、
前記薄く形成される領域では、前記クロム層の結晶粒子間隔が、前記他の領域のクロム層の結晶粒子間隔よりも広くなり、前記合金層は、前記結晶粒子間に生成されていることを特徴とする請求項6に記載の半導体装置。 - 前記境界領域では、前記パッド電極の表面と前記絶縁層の傾斜面との成す角度が、70〜90度となることを特徴とする請求項6または請求項7に記載の半導体装置。
- 前記パッド電極は、アルミニウム層またはアルミニウム合金層から成り、前記電極は、銅層と、前記銅層上に形成されるバンプ電極とを有することを特徴とする請求項6または請求項7に記載の半導体装置。
- 前記樹脂膜は、ポリベンズオキサゾール膜またはポリイミド樹脂膜から成ることを特徴とする請求項6または請求項7に記載の半導体装置。
- 半導体基板上を絶縁処理し、前記絶縁処理された半導体基板上にパッド電極を形成し、前記パッド電極を被覆するように前記絶縁処理された半導体基板上に絶縁層を形成した後、前記パッド電極の表面が露出するように前記絶縁層に複数の開口領域を形成する工程と、
前記開口領域を介して前記パッド電極と接続するように、前記絶縁層上に金属層を形成する工程と、
前記開口領域の形成領域上の前記金属層が露出するように、前記絶縁層上にシールド層を形成する工程と、
前記開口領域の形成領域上の前記金属層が露出するように、前記シールド層上に樹脂膜を形成する工程と、
前記樹脂膜から露出する前記金属層上にメッキ用金属層を形成した後、前記メッキ用金属層上に電極を形成する工程とを有することを特徴とする半導体装置の製造方法。 - 前記メッキ用金属層としてスパッタリング法によりクロム層及び前記クロム層上に銅層を形成することを特徴とする請求項11に記載の半導体装置の製造方法。
- 前記金属層としてアルミニウム層またはアルミニウム合金層を形成し、前記電極として銅層と、前記銅層上にバンプ電極とを形成することを特徴とする請求項11または請求項12に記載の半導体装置の製造方法。
- 前記樹脂膜としてポリベンズオキサゾール膜またはポリイミド樹脂膜を形成することを特徴とする請求項11または請求項12に記載の半導体装置の製造方法。
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