JPWO2018021322A1 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
- Publication number
- JPWO2018021322A1 JPWO2018021322A1 JP2018529918A JP2018529918A JPWO2018021322A1 JP WO2018021322 A1 JPWO2018021322 A1 JP WO2018021322A1 JP 2018529918 A JP2018529918 A JP 2018529918A JP 2018529918 A JP2018529918 A JP 2018529918A JP WO2018021322 A1 JPWO2018021322 A1 JP WO2018021322A1
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- Japan
- Prior art keywords
- electrode plate
- metal
- metal member
- electrode
- semiconductor device
- 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.)
- Granted
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 351
- 229910052751 metal Inorganic materials 0.000 claims abstract description 396
- 239000002184 metal Substances 0.000 claims abstract description 396
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 58
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 57
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 33
- 239000010949 copper Substances 0.000 claims description 63
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 61
- 229910052802 copper Inorganic materials 0.000 claims description 61
- 239000000463 material Substances 0.000 claims description 33
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 30
- 238000005304 joining Methods 0.000 claims description 16
- 238000009792 diffusion process Methods 0.000 claims description 5
- 229910000679 solder Inorganic materials 0.000 description 186
- 239000000758 substrate Substances 0.000 description 52
- 239000004020 conductor Substances 0.000 description 36
- 238000000034 method Methods 0.000 description 28
- 229920005989 resin Polymers 0.000 description 22
- 239000011347 resin Substances 0.000 description 22
- 238000007747 plating Methods 0.000 description 18
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 16
- 238000007789 sealing Methods 0.000 description 13
- 238000003825 pressing Methods 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 7
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- 229910052759 nickel Inorganic materials 0.000 description 7
- 238000005476 soldering Methods 0.000 description 7
- 238000003466 welding Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 239000002082 metal nanoparticle Substances 0.000 description 6
- 238000001465 metallisation Methods 0.000 description 6
- 238000004382 potting Methods 0.000 description 6
- 229910052709 silver Inorganic materials 0.000 description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 2
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 2
- 229920000106 Liquid crystal polymer Polymers 0.000 description 2
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
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- 229910052737 gold Inorganic materials 0.000 description 2
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- 230000000149 penetrating effect Effects 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 238000001721 transfer moulding Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229910002601 GaN Inorganic materials 0.000 description 1
- 229910001374 Invar Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
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- 238000010304 firing Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
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Classifications
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- H01L23/18—Fillings characterised by the material, its physical or chemical properties, or its arrangement within the complete device
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Abstract
Description
まず、本発明の実施の形態1における半導体装置の構成を説明する。図1は、本発明の実施の形態1における半導体装置を示す平面図である。また、図2は、本発明の実施の形態1における半導体装置を示す断面図である。なお、図1において、封止樹脂部70は省略して示している。
図3は、本発明の実施の形態1における半導体装置の製造方法を示す断面図である。図3(a)は、絶縁基板10に半導体素子21、22を接合するまでの工程を示す図であり、図3(b)は、半導体素子21、22の表面電極と第1のリードフレーム60の金属部材61、62との間に板はんだ31a、32aを載置するまでの工程を示す図である。また、図3(c)は、半導体素子21、22の表面電極と第1のリードフレーム60の金属部材61、62とをはんだ接合して、半導体素子22の制御電極と第2のリードフレーム67とを電気的に接続するまでの工程を示す図であり、図3(d)は、封止樹脂部70を形成して半導体装置100を完成させるまでの工程を示す図である。
図4は、本発明の実施の形態1における半導体装置の第1のリードフレームの製造方法を示す部分断面図である。図4は、第1のリードフレーム60の金属部材62とその周辺の電極板63とを示しており、焼嵌めにより金属部材62と電極板63とを固着させる方法を示したものである。図4(a)は、電極板63を加熱して、電極板63に形成した開口部の面積を拡大させた状態を示す図であり、図4(b)は、電極板63を冷却して、電極板63に形成された開口部が縮小し、金属部材62と電極板63とが焼嵌めにより固着された状態を示す図である。図4では、金属部材61を省略して示しているが、金属部材61についても、金属部材62と同一の方法により電極板63に固着される。
上述したように、本発明の半導体装置100は、第1のリードフレーム60が、銅または銅合金などのはんだが濡れる金属で形成された金属部材61、62に、アルミニウムまたはアルミニウム合金からなり表面に自然酸化膜を有するためにはんだが濡れない電極板63が固着されて形成されている。このため、半導体素子21、22の表面電極と第1のリードフレーム60とを電気的に接続するために、半導体素子21、22の表面電極と金属部材61、62との間にはんだを配置してはんだを溶融させても、溶融したはんだは、半導体素子21、22の表面電極上および金属部材61、62の表面上にしか濡れない。つまり、アルミニウムまたはアルミニウム合金で形成された電極板63には、溶融したはんだは濡れ広がることができない。つまり、平面視で半導体素子21、22の表面電極より面積が小さい金属部材61、62の表面上にのみはんだを濡れさせ、平面視で半導体素子21、22の表面電極より面積が大きい電極板63にははんだを濡れ広がらせないので、はんだ接合に必要なはんだ量を低減することができる。
図7は、本発明の実施の形態2における半導体装置を示す断面図である。図7において、図1および図2と同じ符号を付けたものは、同一または対応する構成を示しており、その説明を省略する。本発明の実施の形態1とは、半導体装置200がケースおよび封止樹脂部を備えておらず、モールド樹脂を用いたトランスファーモールドにより封止された構成が相違している。
図8は、本発明の実施の形態3における半導体装置の第1のリードフレームと半導体素子の表面電極とのはんだ接合部の構成を示す部分断面図である。なお、図8では、半導体素子22と金属部材62とのはんだ接合部の構成について示しているが、半導体素子21と金属部材61とのはんだ接合部についても同様の構成となっている。図8において、図1および図2と同じ符号を付けたものは、同一または対応する構成を示しており、その説明を省略する。本発明の実施の形態1とは、第1のリードフレーム60を構成する電極板63と金属部材62との固着構造が相違している。
図11は、本発明の実施の形態4における半導体装置の第1のリードフレームと半導体素子の表面電極とのはんだ接合部の構成を示す部分断面図である。なお、図11では、半導体素子22と金属部材62とのはんだ接合部の構成について示しているが、実施の形態3で示した半導体装置と同様、半導体素子21と金属部材61とのはんだ接合部についても同様の構成となっている。図11において、図1、図2および図8と同じ符号を付けたものは、同一または対応する構成を示しており、その説明を省略する。本発明の実施の形態1とは、第1のリードフレーム60を構成する金属部材162の構造が相違している。
図13は、本発明の実施の形態5における半導体装置を示す平面図である。また、図14は、本発明の実施の形態5における半導体装置の第1のリードフレームと半導体素子の表面電極とのはんだ接合部の構成を示す部分断面図である。図13および図14において、図1と同じ符号を付けたものは、同一または対応する構成を示しており、その説明を省略する。本発明の実施の形態1とは、第1のリードフレーム60の構造が相違している。なお、図13では、封止樹脂部を省略して示している。
図16は、本発明の実施の形態6における半導体装置の第1のリードフレームと半導体素子の表面電極とのはんだ接合部の構成を示す部分断面図である。なお、図16では、実施の形態4で示した図12と同様、半導体素子22と金属部材62とのはんだ接合部の構成について示しているが、半導体素子21と金属部材61とのはんだ接合部についても同様の構成となっている。図16において、図12と同じ符号を付けたものは、同一または対応する構成を示しており、その説明を省略する。実施の形態で示した図12とは、第1のリードフレーム60を構成する金属部材62が、かしめリング形状に構成されている点が相違している。
図17は、本発明の実施の形態7における半導体装置の第1のリードフレームと半導体素子の表面電極とのはんだ接合部の構成を示す部分断面図である。図17において、実施の形態5に示す図14と同じ符号を付けたものは、同一または対応する構成を示しており、その説明を省略する。本発明の実施の形態5に示す図14とは、金属管の構造が相違している。
31、32 はんだ
33、34 表面電極
60 第1のリードフレーム
61、62、161、162、163、164、165、166、167 金属部材
63 電極板
162a 挿入部、162b 接合部
163a 凹部
165a、165b 挟持部
100、200、300、400 半導体装置
Claims (14)
- 表面電極を有する半導体素子と、
平面視で前記半導体素子の前記表面電極より面積が大きく、アルミニウムまたはアルミニウム合金からなる電極板と、
前記半導体素子の前記表面電極に接合材で接合された接合面を有し、平面視で前記半導体素子の前記表面電極より面積が小さく、前記電極板とは異なる金属からなり、前記電極板に固着され、前記半導体素子の前記表面電極と前記電極板とを電気的に接続した金属部材と、
を備えた半導体装置。 - 前記金属部材は、前記電極板の表面から突出した突出部を有し、
前記突出部は、前記半導体素子の前記表面電極に対向した底面と、前記底面と前記電極板との間に設けられた側面とを有し、
前記接合面が前記底面および前記側面で構成され、前記接合材が前記底面および前記側面に設けられた請求項1に記載の半導体装置。 - 前記金属部材は、前記接合面を有する第1の金属層のみで構成された請求項1または2に記載の半導体装置。
- 前記金属部材は、積層された複数の金属層で構成され、
前記複数の金属層は、前記接合面を有する第1の金属層と、前記第1の金属層とは異なる金属からなる第2の金属層とを含む請求項1または2に記載の半導体装置。 - 前記金属部材の前記第1の金属層は、銅または銅合金からなる請求項3または4に記載の半導体装置。
- 前記金属部材の前記第1の金属層の厚さは、10μm以上である請求項3から5のいずれか1項に記載の半導体装置。
- 前記金属部材の前記接合面に凹部が設けられ、
前記凹部内に前記接合材が設けられた請求項1から6のいずれか1項に記載の半導体装置。 - 前記電極板には開口部が設けられ、前記金属部材が前記開口部に挿入された請求項1から7のいずれか1項に記載の半導体装置。
- 平面視で、前記金属部材の前記接合面の面積は、前記電極板の前記開口部の面積より大きい請求項8に記載の半導体装置。
- 前記金属部材は、対向して設けられた一対の挟持部を有し、
前記電極板は、前記金属部材の前記挟持部に挟持された請求項1から7のいずれか1項に記載の半導体装置。 - 前記金属部材は金属管で構成され、前記挟持部は前記金属管の管壁で構成された請求項10に記載の半導体装置。
- 前記金属管のうち、前記半導体素子の前記表面電極に面する部分の一部がバネ性を有することを特徴とする請求項11に記載の半導体装置。
- 前記金属部材がリング状の部材であり、前記開口部に対してかしめによって挿入固定されることを特徴とする請求項9に記載の半導体装置。
- 前記金属部材と前記電極板との間の少なくとも一部に、金属拡散を伴った接合部が形成されていることを特徴とする請求項1から7のいずれか1項に記載の半導体装置。
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US20190189537A1 (en) | 2019-06-20 |
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WO2018021322A1 (ja) | 2018-02-01 |
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