JP2019110317A - 電力用半導体装置 - Google Patents
電力用半導体装置 Download PDFInfo
- Publication number
- JP2019110317A JP2019110317A JP2019028427A JP2019028427A JP2019110317A JP 2019110317 A JP2019110317 A JP 2019110317A JP 2019028427 A JP2019028427 A JP 2019028427A JP 2019028427 A JP2019028427 A JP 2019028427A JP 2019110317 A JP2019110317 A JP 2019110317A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- semiconductor device
- solder layer
- conductor layer
- power semiconductor
- 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 121
- 229910000679 solder Inorganic materials 0.000 claims abstract description 123
- 239000004020 conductor Substances 0.000 claims abstract description 55
- 239000000463 material Substances 0.000 claims abstract description 52
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 26
- 239000000956 alloy Substances 0.000 claims abstract description 26
- 239000000758 substrate Substances 0.000 claims description 33
- 229910017482 Cu 6 Sn 5 Inorganic materials 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 abstract description 4
- 239000010949 copper Substances 0.000 description 28
- 238000005476 soldering Methods 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 6
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 239000003566 sealing material Substances 0.000 description 5
- 229910052718 tin Inorganic materials 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000011800 void material Substances 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910020888 Sn-Cu Inorganic materials 0.000 description 2
- 229910019204 Sn—Cu Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
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- 239000000945 filler Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 229920002120 photoresistant polymer Polymers 0.000 description 2
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- 239000011347 resin Substances 0.000 description 2
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- 239000007790 solid phase Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 229910017944 Ag—Cu Inorganic materials 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000962 AlSiC Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910017755 Cu-Sn Inorganic materials 0.000 description 1
- 229910017927 Cu—Sn Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920000106 Liquid crystal polymer Polymers 0.000 description 1
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 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
- 239000011230 binding agent Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- -1 polybutylene terephthalate Polymers 0.000 description 1
- 229920006389 polyphenyl polymer Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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Abstract
Description
図1は、全体が100で表される、本発明の実施の形態1にかかる電力用半導体装置の断面図である。また、図2は、図1の破線で囲んだ部分Aの拡大断面図である。
ベース板1の上面には、半田層7により、絶縁基板3が固定されている。半田層7は、例えばSnからなる。
図5は、本発明の実施の形態2にかかる電力用半導体装置200の一部の拡大断面図であり、図1と同一符号は、同一または相当箇所を示す。電力用半導体装置200では、ベース板1と絶縁基板3の導体層3cとの間に、半田層7の材料と合金形成が可能なワイヤバンプ29が設けられている。
Claims (17)
- 少なくとも表面に導体層を有する絶縁基板と、
該導体層の上に設けられたワイヤバンプと、
該ワイヤバンプの上に載置された半導体素子と、
該導体層の上に該導体層と該半導体素子とを接合する半田層と、を含み、
該ワイヤバンプと該半田層との界面に、該ワイヤバンプの材料と該半田層の材料からなる合金を有することを特徴とする電力用半導体装置。 - 上記ワイヤバンプの熱伝導率は、上記半田層の熱伝導率より大きいことを特徴とする請求項1に記載の電力用半導体装置。
- 上記ワイヤバンプは、その両端が上記導体層にウェッジボンド接合部を有するボンディングワイヤからなることを特徴とする請求項1に記載の電力用半導体装置。
- 更に、ウェッジボンド接合部の間に、上記ボンディングワイヤが上記導体層に複数のステッチボンド接合部を有し、該ウェッジボンド接合部と該ステッチボンド接合部との間隔、および隣接する該ステッチボンド接合部の間隔は、それぞれ2mm以下であることを特徴とする請求項3に記載の電力用半導体装置。
- 上記半導体素子を、上記導体層の上に垂直投影した、矩形形状の半導体素子搭載領域において、該半導体素子搭載領域の四隅にそれぞれ上記ワイヤバンプが設けられたことを特徴とする請求項1に記載の電力用半導体装置。
- 上記ワイヤバンプの長手方向は、上記半導体素子搭載領域の対角線と直交することを特徴とする請求項5に記載の電力用半導体装置。
- 上記ワイヤバンプの長手方向は、上記半導体素子搭載領域の対角線と、0°より大きく90°以下の角度で交差することを特徴とする請求項5に記載の電力用半導体装置。
- 上記半導体素子搭載領域中に、更に上記ワイヤバンプが設けられたことを特徴とする請求項5〜7のいずれかに記載の電力用半導体装置。
- ベース板と、
該ベース板の上に設けられた複数のワイヤバンプと、
該ワイヤバンプの上に載置された、少なくとも裏面に導体層を有する絶縁基板と、
該ベース板の上に該絶縁基板の該導体層を接合する半田層と、を含み、
該ワイヤバンプと該半田層との界面に、該ワイヤバンプの材料と該半田層の材料からなる合金が形成されたことを特徴とする電力用半導体装置。 - 上記ワイヤバンプの熱伝導率は、上記半田層の熱伝導率より大きいことを特徴とする請求項9に記載の電力用半導体装置。
- 上記ワイヤバンプは、その両端が上記導体層にウェッジボンド接合されたウェッジボンド接合部と、該ウェッジボンド接合部の間に、ボンディングワイヤが上記導体層にステッチボンド接合された複数のステッチボンド接合部を有し、該ウェッジボンド接合部と該ステッチボンド接合部との間隔、および隣接する該ステッチボンド接合部の間隔は、それぞれ2.0mm以下であることを特徴とする請求項9に記載の電力用半導体装置。
- 上記導体層を、上記ベース板の上に垂直投影した、矩形形状の導体層搭載領域において、該半導体素子搭載領域の四隅にそれぞれ上記ワイヤバンプが設けられたことを特徴とする請求項9に記載の電力用半導体装置。
- 上記ワイヤバンプの長手方向は、上記導体層搭載領域の対角線と、0°より大きく90°以下の角度で交差することを特徴とする請求項12に記載の電力用半導体装置。
- 上記ベース板の上に、上記半田層が設けられる半田層形成領域を有し、該半田層形成領域の四隅、および該半田層形成領域の内部に上記ワイヤバンプが設けられたことを特徴とする請求項9に記載の電力用半導体装置。
- 上記ワイヤバンプはCuからなり、上記半田層はSn系半田材料からなることを特徴とする請求項1〜14のいずれかに記載の電力用半導体装置。
- 上記ワイヤバンプの材料と半田層の材料からなる合金は、Cu6Sn5またはCu3Snであることを特徴とする請求項15に記載の電力用半導体装置。
- 上記ベース板と上記絶縁基板との間の上記半田層と、上記絶縁基板と上記半導体素子との間の上記半田層とが、異なる材料からなることを特徴とする請求項1〜16のいずれかに記載の電力用半導体装置。
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JP2022031611A (ja) * | 2018-11-09 | 2022-02-22 | 住友電気工業株式会社 | 半導体装置 |
JP7407732B2 (ja) * | 2018-12-04 | 2024-01-04 | 株式会社クラレ | 高電圧用回路基板およびそれを用いた高電圧デバイス |
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JP7489879B2 (ja) | 2020-09-25 | 2024-05-24 | 三菱電機株式会社 | 電力用半導体装置および電力用半導体装置の製造方法 |
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