JP2007165690A - ヒートスプレッダと金属板との接合方法 - Google Patents
ヒートスプレッダと金属板との接合方法 Download PDFInfo
- Publication number
- JP2007165690A JP2007165690A JP2005361624A JP2005361624A JP2007165690A JP 2007165690 A JP2007165690 A JP 2007165690A JP 2005361624 A JP2005361624 A JP 2005361624A JP 2005361624 A JP2005361624 A JP 2005361624A JP 2007165690 A JP2007165690 A JP 2007165690A
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- Prior art keywords
- copper
- heat spreader
- metal plate
- laser
- joining
- 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.)
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 67
- 239000002184 metal Substances 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 49
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 137
- 239000010949 copper Substances 0.000 claims abstract description 133
- 229910052802 copper Inorganic materials 0.000 claims abstract description 133
- 239000000463 material Substances 0.000 claims abstract description 44
- WUUZKBJEUBFVMV-UHFFFAOYSA-N copper molybdenum Chemical compound [Cu].[Mo] WUUZKBJEUBFVMV-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000004065 semiconductor Substances 0.000 claims description 43
- 229910052750 molybdenum Inorganic materials 0.000 claims description 26
- 239000011733 molybdenum Substances 0.000 claims description 26
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 25
- 238000007747 plating Methods 0.000 claims description 22
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 13
- 229910052721 tungsten Inorganic materials 0.000 claims description 13
- 239000010937 tungsten Substances 0.000 claims description 13
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 claims description 10
- 238000002844 melting Methods 0.000 abstract description 30
- 230000008018 melting Effects 0.000 abstract description 30
- 229910000679 solder Inorganic materials 0.000 abstract description 25
- 239000004020 conductor Substances 0.000 abstract description 23
- 238000003466 welding Methods 0.000 abstract description 15
- 238000010586 diagram Methods 0.000 description 11
- 238000010521 absorption reaction Methods 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229910000881 Cu alloy Inorganic materials 0.000 description 5
- 230000020169 heat generation Effects 0.000 description 5
- 230000035882 stress Effects 0.000 description 5
- 239000004734 Polyphenylene sulfide Substances 0.000 description 4
- 229920001707 polybutylene terephthalate Polymers 0.000 description 4
- 229920000069 polyphenylene sulfide Polymers 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 239000011889 copper foil Substances 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- -1 polybutylene terephthalate Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229920002050 silicone resin Polymers 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002751 molybdenum Chemical class 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
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Abstract
【解決手段】銅と銅−モリブデン焼結体の積層体で形成したクラッド材のヒートスプレッダ1の銅側上に外部導出導体である銅板5を配置する。レーザ出射ユニット18の照準を溶融予定個所21に合わせ、レーザ出射ユニット18によりYAGレーザ19を照射し、銅板5とクラッド材のヒートスプレッダ1の銅を溶融して、溶融部20で固着する。このヒートスプレッダ1においては、銅−モリブデン焼結体に達する深い溶融部20を得ることができるために、高い接合強度と電気・熱抵抗に優れた溶接構造が実現できる。
【選択図】図2
Description
これは、アルミワイヤが例えば直径が300μmや400μmといった細線であり、チップで発生した熱を移動することが出来ないばかりか、アルミワイヤ自身がジュール発熱により発熱し、場合によっては溶断してしまう問題点がある。
前記ヒートスプレッダは、モリブデン,タングステン,銅−モリブデンの焼結体,銅−タングステンの焼結体のいずれかであり、該ヒートスプレッダの少なくとも前記金属板との接合面にNiめっき膜を形成し、前記金属板が銅であり、
前記ヒートスプレッダのNiめっき膜上に前記金属板を配置し、該金属板と前記ヒートスプレッダとをレーザ溶接する接合方法とする。
溶融し溶融部20で固着する。IGBTチップ6上のゲートパッド9と、ゲート用導体パターン15の間をアルミワイヤ17で接続する。
つぎに、レーザ出射ユニット18の照準を溶融予定個所21に合わせる(同図(b))。
つぎに、レーザ出射ユニット18によりYAGレーザ19を照射し、銅板6と銅のヒートスプレッダ1を溶融して、溶融部20で固着する(同図(c))。
つぎに、レーザ出射ユニット18の照準を溶融予定個所21に合わせる(同図(b))。
つぎに、レーザ出射ユニット18によりYAGレーザ19を照射し、銅板5とクラッド材のヒートスプレッダ2の銅2aを溶融して、溶融部20で固着する(同図(c))。
つぎに、レーザ出射ユニット18の照準を溶融予定個所21に合わせる(同図(b))。
つぎに、レーザ出射ユニット18によりYAGレーザ19を照射し、銅板3aとクラッド材のヒートスプレッダ3の銅3aを溶融し、溶融部20で固着する(同図(c))。
2 クラッド材のヒートスプレッダ
2a 銅
2b 銅−モリブデン焼結体
3 クラッド材のヒートスプレッダ/モリブデン
3a 銅
3b モリブデン
4 ヒートスプレッダ
5 銅板
6 IGBTチップ
7 はんだ
8 エミッタ電極
9 ゲートパッド
10 導電パターン付き絶縁基板
11 セラミクス
12 裏面銅箔
13 エミッタ用導体パターン
14 コレクタ用導体パターン
15 ゲート用導電パターン
16 はんだ
17 アルミワイヤ
18 レーザ出射ユニット
19 YAGレーザ
20 溶融部
21 溶融予定個所
22 Niめっき膜
Claims (6)
- 半導体チップ上に固着材を介して固着されたヒートスプレッダ上に金属板を接合するヒートスプレッダと金属板との接合方法において、前記ヒートスプレッダおよび前記金属板が銅で形成され、前記ヒートスプレッダと前記金属板とをレーザで溶接し、レーザパワー密度が0.4MW/cm2を超え、1.5MW/cm2未満であり、レーザエネルギーが50Jを超え、150J未満であることを特徴とするヒートスプレッダと金属板との接合方法。
- 半導体チップ上に固着材を介して固着されたヒートスプレッダ上に金属板を接合するヒートスプレッダと金属板との接合方法において、前記ヒートスプレッダが銅と銅−モリブデン焼結体の積層体であるクラッド材もしくは銅と銅−タングステン焼結体の積層体であるクラッド材であり、前記金属板が銅で形成され、該金属板と前記積層体であるクラッド材の銅とをレーザ溶接することを特徴とするヒートスプレッダと金属板との接合方法。
- 半導体チップ上に固着材を介して固着されたヒートスプレッダ上に金属板を接合するヒートスプレッダと金属板との接合方法において、前記ヒートスプレッダが銅と銅−モリブデンの積層体であるクラッド材もしくは銅と銅−タングステンの積層体であるクラッド材であり、前記金属板が銅で形成され、該金属板と前記積層体であるクラッド材の銅とをレーザ溶接することを特徴とするヒートスプレッダと金属板との接合方法。
- 半導体チップ上に固着材を介して固着されたヒートスプレッダの上に金属板を接合するヒートスプレッダと金属板との接合方法において、
前記ヒートスプレッダは、モリブデン,タングステン,銅−モリブデンの焼結体,銅−タングステンの焼結体のいずれかであり、該ヒートスプレッダの少なくとも前記金属板との接合面にNiめっき膜を形成し、前記金属板が銅であり、
前記ヒートスプレッダのNiめっき膜上に前記金属板を配置し、該金属板と前記ヒートスプレッダとをレーザ溶接することを特徴とするヒートスプレッダと金属板との接合方法。
- 前記銅の表面にNiめっき膜が形成されていることを特徴とする請求項1〜3のいずれか一項に記載のヒートスプレッダと金属板との接合方法。
- 前記金属板に、銅に替えてアルミニウムを用いることを特徴とする請求項1〜4のいずれか一項に記載のヒートスプレッダと金属板との接合方法。
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Cited By (14)
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JP2009105267A (ja) * | 2007-10-24 | 2009-05-14 | Fuji Electric Device Technology Co Ltd | 半導体装置およびその製造方法 |
WO2009081723A1 (ja) * | 2007-12-20 | 2009-07-02 | Fuji Electric Device Technology Co., Ltd. | 半導体装置およびその製造方法 |
WO2013021983A1 (ja) * | 2011-08-10 | 2013-02-14 | 富士電機株式会社 | 半導体装置及びその製造方法 |
WO2017194661A1 (en) * | 2016-05-11 | 2017-11-16 | Danfoss Silicon Power Gmbh | Power electronic assembly and a low-vibration connection method |
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US9944048B2 (en) | 2011-03-14 | 2018-04-17 | Panasonic Intellectual Property Management Co., Ltd. | Laser-bonded component and production method for same |
WO2018207856A1 (ja) * | 2017-05-10 | 2018-11-15 | ローム株式会社 | パワー半導体装置およびその製造方法 |
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JP2021039997A (ja) * | 2019-09-02 | 2021-03-11 | 株式会社ディスコ | 被加工物の加工方法 |
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JPWO2020071185A1 (ja) * | 2018-10-02 | 2021-09-02 | ローム株式会社 | 半導体装置および半導体装置の製造方法 |
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JP2021039997A (ja) * | 2019-09-02 | 2021-03-11 | 株式会社ディスコ | 被加工物の加工方法 |
CN115297987A (zh) * | 2020-03-18 | 2022-11-04 | 三菱综合材料株式会社 | 接合体及接合体的制造方法 |
WO2022030650A1 (ja) * | 2020-08-07 | 2022-02-10 | 株式会社Flosfia | 半導体素子および半導体装置 |
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