JP5566329B2 - リボンボンディング - Google Patents
リボンボンディング Download PDFInfo
- Publication number
- JP5566329B2 JP5566329B2 JP2011095250A JP2011095250A JP5566329B2 JP 5566329 B2 JP5566329 B2 JP 5566329B2 JP 2011095250 A JP2011095250 A JP 2011095250A JP 2011095250 A JP2011095250 A JP 2011095250A JP 5566329 B2 JP5566329 B2 JP 5566329B2
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- Japan
- Prior art keywords
- ribbon
- ribbon material
- bonding
- electrical connection
- mil
- 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.)
- Expired - Lifetime
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- 239000000463 material Substances 0.000 claims description 57
- 238000000034 method Methods 0.000 claims description 46
- 239000004065 semiconductor Substances 0.000 claims description 28
- 239000000758 substrate Substances 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 55
- 229910052782 aluminium Inorganic materials 0.000 description 36
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 35
- 230000008569 process Effects 0.000 description 34
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 33
- 229910052802 copper Inorganic materials 0.000 description 33
- 239000010949 copper Substances 0.000 description 33
- 238000001465 metallisation Methods 0.000 description 21
- 230000008901 benefit Effects 0.000 description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 13
- 229910052710 silicon Inorganic materials 0.000 description 13
- 239000010703 silicon Substances 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 229910000679 solder Inorganic materials 0.000 description 12
- 230000007423 decrease Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
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- 230000007480 spreading Effects 0.000 description 7
- 238000003892 spreading Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 5
- 229910052737 gold Inorganic materials 0.000 description 5
- 239000010931 gold Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000005476 soldering Methods 0.000 description 4
- 238000000637 aluminium metallisation Methods 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- 230000002500 effect on skin Effects 0.000 description 3
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- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012993 chemical processing Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- -1 copper are suitable Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
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- 230000007613 environmental effect Effects 0.000 description 1
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- 238000005304 joining Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- MOFOBJHOKRNACT-UHFFFAOYSA-N nickel silver Chemical compound [Ni].[Ag] MOFOBJHOKRNACT-UHFFFAOYSA-N 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012536 packaging technology Methods 0.000 description 1
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- 239000002356 single layer Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/498—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
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- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/495—Lead-frames or other flat leads
- H01L23/49517—Additional leads
- H01L23/4952—Additional leads the additional leads being a bump or a wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/008—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating pressure combined with radiant energy
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- H01L24/78—Apparatus for connecting with wire connectors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/32—Wires
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
- B23K2101/38—Conductors
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- H01L2924/1901—Structure
- H01L2924/1904—Component type
- H01L2924/19041—Component type being a capacitor
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- H01L2924/1901—Structure
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- H01L2924/19042—Component type being an inductor
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- H01L2924/20303—Ultrasonic frequency [f] 50 Khz=<f< 75 KHz
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Description
しかしながら、ストラップの使用には、欠点もある。金属被覆部分22の表面へストラップ50を半田付けするためには、半田付け可能なメタライゼーション、例えば銅またはニッケルが必要である。一般に、そのようなメタライゼーションには、いくつかの異なる金属層(図示せず)を積み重ねる必要があり、各層は、半田付けプロセスの特有の役割、例えば接着、バリアおよび半田付け性を有している。これらの層は、標準的なメタライゼーション層とは異なる、例えばアルミニウムであり、その結果、メタライゼーションの製造コストが高くなり、よって半導体ダイのより製造コストが高くなる。一般には、半田ペーストプロセスが、部品を連結するために用いられる。半田ペースト56は、あるタイプのフラックス成分を含み、それには、以下のことが必要である。(1)素子を一時的に留めること、(2)(特にリフロープロセスが大気中で行われる場合)酸化を防止すること、(3)すでに存在する酸化物を取り除くかまたは減少させること。部品の質によって異なるが、強力なフラックスのみを使用することによって、半田付けプロセスがエラー強さのあるプロセスとなり、信頼できる結果が得られる。リフロー後にフラックスの残留物が表面を覆うことは周知である。それらの存在は、(湿度で腐食するなどの)他の悪影響に加えて、次のパッケージ封入時におけるモールドコンパウンドの接着の強度および再現性に悪影響を及ぼす。これは、繰り返すが、そのような部品の信頼性を制限する結果になりかねない。したがって、一般に、半田ペーストで処理された部品は、リフローの後次の処理またはパッケージングの前に、十分に洗浄する必要がある。
例えば、60 mil × 8 mil のアルミニウムリボンが、約2000gの引張り強さを持ち得る。リボン404の幅は、20 mil から100 mil またはそれ以上の厚さにすることができる。一実施形態では、幅は120 milである。一般に、多数のワイヤの代わりに、幅がより広いリボンを使用可能である。例えば、5本の20 milのワイヤの代わりに、単一の120 mil のリボンを使用可能である。リボン404の厚さは、2 mil から10 mil またはそれ以上の厚さにすることができる。一実施形態では、厚さは、12 mil である。厚さを 2mil にするには、基板内へ切り込まずにリボンの切り離しをできるように正確な切り離し制御が必要である。改良した装置およびプロセスで厚さを薄くすることができることに留意する。リボン404のいくつかの典型的なサイズは、20 mil × 2 mil 、20 mil × 4 mil 、30 mil × 3 mil 、40 mil × 4 mil 、50 mil × 5 mil 、60 mil × 8 mil 、80 mil × 6 mil 、80 mil × 8 mil 、80 mil × 10 mil および 100 mil × 10 mil である。アスペクト比(幅/厚さ)は、一実施形態では、7と13との間であり、典型的な比は約10である。約10のアスペクト比が、ボンディング能力(薄いほどよい)と傾斜感度(厚いほどよい)との間によい妥協点を提供することが分かった。システム要件およびプロセス技術などの要因によって異なる他のリボンサイズも適切な場合があることを、当業者は理解するだろう。
Claims (18)
- 第1の素子と第2の素子との電気的接続を提供する方法であって、
(a)ボンディングツールを用いて、長方形の断面を有するリボン材料における第1の部分を、第1の線状の接合部を形成するように、第1の素子に超音波ボンディングするステップと、
(b)ステップ(a)の後、前記第1の部分と連続する前記リボン材料の長手部を第2の素子に延ばすステップと、
(c)前記ボンディングツールを用いて、前記リボン材料の第2の部分を、第2の線状の接合部を形成するように、前記第2の素子にボンディングし、それにより、前記第1の素子と前記第2の素子との電気的接続を提供するステップと、
を備え、
ステップ(a)における前記リボン材料の前記第1の部分、及び、ステップ(c)における前記リボン材料の前記第2の部分の少なくとも1つの前記ボンディングは、前記リボン材料が前記第1の素子から前記第2の素子に延びる長手部に垂直でない角度で行われる方法。 - 前記長方形の断面を有するリボン材料は、厚さに対する幅の比が7〜13の範囲内となるよう提供される、請求項1に記載の方法。
- ステップ(a)は、基板により支持される半導体ダイに前記リボン材料の第1の部分を超音波ボンディングすることを含む、請求項1に記載の方法。
- 前記基板は、リードフレームであり、
ステップ(c)は、前記リードフレームのリードに前記リボン材料の第2の部分をボンディングすることを含む、請求項3に記載の方法。 - 前記第1及び第2の素子は、それぞれ半導体ダイを有する、請求項1に記載の方法。
- 前記リボン材料の長手部を延ばすことは、ステップ(a)の後に前記リボン材料の長手部を送り込むことを含む、請求項1に記載の方法。
- 前記リボン材料の長手部を送り込むことは、リボンガイドにより前記リボン材料の長手部を案内することを含む、請求項6に記載の方法。
- (d)ステップ(c)の後、前記リボン材料を切るステップをさらに備える、請求項1に記載の方法。
- ステップ(b)は、前記リボン材料の長手部を円弧状に沿うように延ばすことを含む、請求項1に記載の方法。
- 第1の素子と第2の素子との電気的接続であって、
長方形の断面を有するリボン材料の第1の部分であって、第1の素子に超音波ボンディングされる前記第1の部分と、
前記第1の部分に連続する前記リボン材料の長手部分であって、前記第1の素子から間隔をあけて配置された第2の素子に延びる前記リボン材料の長手部分と、
前記第2の素子にボンディングされる、前記リボン材料の第2の部分と、
を含み、
前記リボン材料の前記第1の部分、及び、前記リボン材料の前記第2の部分の少なくとも1つは、前記リボン材料が前記第1の素子から前記第2の素子に延びる長手部分に垂直でない角度で、線状の接合部となるようにボンディングされる、電気的接続。 - 前記第1の素子は、半導体ダイを有し、
前記第2の素子は、前記半導体ダイを支持する基板を有する、請求項10に記載の電気的接続。 - 前記第1及び第2の素子は、それぞれ半導体ダイを有する、請求項10に記載の電気的接続。
- 前記長方形の断面を有するリボン材料は、厚さに対する幅の比が7〜13の範囲内である、請求項10に記載の電気的接続。
- 前記第2の素子に延びる前記リボン材料の長手部は、円弧状に沿っている、請求項10に記載の電気的接続。
- 前記超音波ボンディングされる第1の部分は、複数のステッチ接合を含む、請求項10に記載の電気的接続。
- 前記超音波ボンディングされる第1の部分は、約2〜6のステッチ接合を含む、請求項10に記載の電気的接続。
- 第1の素子と第2の素子との電気的接続を提供する方法であって、
(a)ボンディングツールを用いて、長方形の断面を有するリボン材料における第1の部分を、第1の線状の接合部を形成するように、第1の素子に超音波ボンディングするステップと、
(b)ステップ(a)の後、前記第1の部分と連続する前記リボン材料の長手部を第2の素子に延ばすステップと、
(c)前記ボンディングツールを用いて、前記リボン材料の第2の部分を、第2の線状の接合部を形成するように、前記第2の素子にボンディングし、それにより、前記第1の素子と前記第2の素子との電気的接続を提供するステップと、
を備え、
前記リボン材料の前記ボンディングされた第1の線状の接合部、及び、前記リボン材料の前記ボンディングされた第2の線状の接合部は、前記リボン材料の前記第1の素子から前記第2の素子に延びる長手部に対して互いに異なる角度で形成される方法。 - 第1の素子と第2の素子との電気的接続であって、
長方形の断面を有するリボン材料の第1の部分であって、第1の素子に超音波ボンディングされる前記第1の部分と、
前記第1の部分に連続する前記リボン材料の長手部分であって、前記第1の素子から間隔をあけて配置された第2の素子に延びる前記リボン材料の長手部分と、
前記第2の素子にボンディングされる、前記リボン材料の第2の部分と、
を含み、
前記リボン材料の前記ボンディングされた第1の部分、及び、前記リボン材料の前記ボンディングされた第2の部分は、前記リボン材料の前記第1の素子から前記第2の素子に延びる長手部分に対して互いに異なる角度で形成される線状の接合部である、電気的接続。
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US20070141755A1 (en) | 2007-06-21 |
JP2011155298A (ja) | 2011-08-11 |
DE112004000727T9 (de) | 2007-03-08 |
JP5041654B2 (ja) | 2012-10-03 |
DE112004000727B4 (de) | 2018-04-19 |
WO2004100258A3 (en) | 2006-02-23 |
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