JP6845200B2 - 電力用半導体素子の負荷端子 - Google Patents
電力用半導体素子の負荷端子 Download PDFInfo
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- JP6845200B2 JP6845200B2 JP2018187906A JP2018187906A JP6845200B2 JP 6845200 B2 JP6845200 B2 JP 6845200B2 JP 2018187906 A JP2018187906 A JP 2018187906A JP 2018187906 A JP2018187906 A JP 2018187906A JP 6845200 B2 JP6845200 B2 JP 6845200B2
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- conductive layer
- support block
- block
- power semiconductor
- terminal structure
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- 239000004065 semiconductor Substances 0.000 title claims description 195
- 230000004888 barrier function Effects 0.000 claims description 26
- 238000009792 diffusion process Methods 0.000 claims description 22
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 20
- 238000001465 metallisation Methods 0.000 claims description 19
- 239000010949 copper Substances 0.000 claims description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 16
- 229910052802 copper Inorganic materials 0.000 claims description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000004806 packaging method and process Methods 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 238000000151 deposition Methods 0.000 claims description 9
- 239000010936 titanium Substances 0.000 claims description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 8
- 229910052715 tantalum Inorganic materials 0.000 claims description 8
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 8
- 229910052719 titanium Inorganic materials 0.000 claims description 8
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 8
- 229910052721 tungsten Inorganic materials 0.000 claims description 8
- 239000010937 tungsten Substances 0.000 claims description 8
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 7
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 claims description 7
- MAKDTFFYCIMFQP-UHFFFAOYSA-N titanium tungsten Chemical compound [Ti].[W] MAKDTFFYCIMFQP-UHFFFAOYSA-N 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 239000010931 gold Substances 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 238000000137 annealing Methods 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052763 palladium Inorganic materials 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 claims description 2
- -1 aluminum silicon copper Chemical compound 0.000 claims description 2
- 235000019589 hardness Nutrition 0.000 description 63
- 229910052733 gallium Inorganic materials 0.000 description 10
- 229910002601 GaN Inorganic materials 0.000 description 9
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 8
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- HZXMRANICFIONG-UHFFFAOYSA-N gallium phosphide Chemical compound [Ga]#P HZXMRANICFIONG-UHFFFAOYSA-N 0.000 description 5
- 229910052738 indium Inorganic materials 0.000 description 5
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 5
- 229910002704 AlGaN Inorganic materials 0.000 description 4
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 3
- 229910005540 GaP Inorganic materials 0.000 description 3
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- AUCDRFABNLOFRE-UHFFFAOYSA-N alumane;indium Chemical compound [AlH3].[In] AUCDRFABNLOFRE-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004151 rapid thermal annealing Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 229910016570 AlCu Inorganic materials 0.000 description 1
- GPXJNWSHGFTCBW-UHFFFAOYSA-N Indium phosphide Chemical compound [In]#P GPXJNWSHGFTCBW-UHFFFAOYSA-N 0.000 description 1
- 229910000661 Mercury cadmium telluride Inorganic materials 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- WIGAYVXYNSVZAV-UHFFFAOYSA-N ac1lavbc Chemical compound [W].[W] WIGAYVXYNSVZAV-UHFFFAOYSA-N 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- DGJPPCSCQOIWCP-UHFFFAOYSA-N cadmium mercury Chemical compound [Cd].[Hg] DGJPPCSCQOIWCP-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- SBEQWOXEGHQIMW-UHFFFAOYSA-N silicon Chemical compound [Si].[Si] SBEQWOXEGHQIMW-UHFFFAOYSA-N 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
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- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Electrodes Of Semiconductors (AREA)
- Wire Bonding (AREA)
Description
2 電力用半導体素子製造方法
3 ボンドワイヤ
4 パッケージング
5 電力用半導体モジュール
10 半導体構造物
11 第1の負荷端子構造物
12 第2の負荷端子構造物
13 制御端子構造物
14 中間構造物
31 端部
32 他方の端部
41 負荷電流インタフェース
111 導電層
112 ボンディングブロック
113 支持ブロック
131 導電層
132 ボンディングブロック
Claims (31)
- −第1の負荷端子構造物(11)と、前記第1の負荷端子構造物(11)から離されて配置される第2の負荷端子構造物(12)と、
−前記第1の負荷端子構造物(11)及び前記第2の負荷端子構造物(12)のそれぞれと電気的に結合され、負荷電流を通すように構成された半導体構造物(10)と、を備え、
前記第1の負荷端子構造物(11)は、
−前記半導体構造物(10)と接触する導電層(111)と、
−少なくとも1本のボンドワイヤ(3)の端部(31)が接触するように構成され、前記少なくとも1本のボンドワイヤ(3)及び前記導電層(111)の少なくとも一方からの負荷電流の少なくとも一部を受けるように構成されたボンディングブロック(112)と、
−前記導電層(111)及び前記ボンディングブロック(112)のそれぞれの硬度より高い硬度を有する支持ブロック(113)であって、前記ボンディングブロック(112)は、前記支持ブロック(113)を介して前記導電層(111)の上にマウントされる、前記支持ブロック(113)と、
を備え、
前記ボンディングブロック(112)及び前記導電層(111)は銅を含み、
前記支持ブロック(113)の前記負荷電流の流れる方向と平行な方向の厚さは、前記ボンディングブロック(112)の同方向の厚さの10分の1より小さい、
電力用半導体素子(1)。 - −第1の負荷端子構造物(11)と、前記第1の負荷端子構造物(11)から離されて配置される第2の負荷端子構造物(12)と、
−前記第1の負荷端子構造物(11)及び前記第2の負荷端子構造物(12)のそれぞれと電気的に結合され、負荷電流を通すように構成された半導体構造物(10)と、を備え、
前記第1の負荷端子構造物(11)は、
−前記半導体構造物(10)と接触する導電層(111)と、
−少なくとも1本のボンドワイヤ(3)の端部(31)が接触するように構成され、前記少なくとも1本のボンドワイヤ(3)及び前記導電層(111)の少なくとも一方からの負荷電流の少なくとも一部を受けるように構成されたボンディングブロック(112)と、
−前記導電層(111)及び前記ボンディングブロック(112)のそれぞれの硬度より高い硬度を有する支持ブロック(113)であって、前記ボンディングブロック(112)は、前記支持ブロック(113)を介して前記導電層(111)の上にマウントされる、前記支持ブロック(113)と、
を備え、
前記ボンディングブロック(112)及び前記導電層(111)は銅を含み、
前記導電層(111)の前記負荷電流の流れる方向と平行な方向の厚さは、前記ボンディングブロック(112)の同方向の厚さの10分の1より小さい、
電力用半導体素子(1)。 - 前記導電層(111)及び前記支持ブロック(113)の少なくとも一方の中に配置されたゾーンであって、窒素原子を有する前記ゾーンをさらに備え、
前記ゾーンは、最大窒素原子濃度が1e14cm−3超である、請求項1又は2に記載の電力用半導体素子(1)。 - 前記ゾーンは、横方向の断面の面積が、前記支持ブロック(113)の横方向の断面の面積の少なくとも50%であるか、前記導電層(111)の横方向の断面の面積の少なくとも50%である、請求項3に記載の電力用半導体素子(1)。
- −前記支持ブロック(113)は、第1の副層(113−1)及び第2の副層(113−2)を含み、前記第1の副層(113−1)は前記ボンディングブロック(112)と接触し、前記第2の副層(113−2)は前記導電層(111)と接触する、
請求項1から4のいずれか一項に記載の電力用半導体素子(1)。 - −前記導電層(111)及び前記ボンディングブロック(112)は、それぞれ、銅、銀、金、パラジウム、亜鉛、ニッケル及び鉄、及びアルミニウムのうちの少なくとも1つを含み、且つ/又は、
−前記支持ブロック(113)は、チタン、タングステン、チタンタングステン、窒化チタン、タンタル、及び窒化タンタルのうちの少なくとも1つを含む、
請求項1から5のいずれか一項に記載の電力用半導体素子(1)。 - −前記支持ブロック(113)の断面の面積は、前記少なくとも1本のボンドワイヤ(3)の断面の面積の2倍から10倍の範囲であり、且つ/又は、
−前記支持ブロック(113)の断面の面積は、前記導電層(111)の全表面積の5%から95%の範囲である、
請求項1から6のいずれか一項に記載の電力用半導体素子(1)。 - −前記ゾーンは、前記支持ブロック(113)のうちの、前記ボンディングブロック(112)への遷移部に近い一セクションの中に配置される、
請求項3又は4に記載の電力用半導体素子(1)。 - −前記支持ブロック(113)の硬度は、モース硬度で少なくとも5.0である、
請求項1から8のいずれか一項に記載の電力用半導体素子(1)。 - −前記導電層(111)及び前記ボンディングブロック(112)のそれぞれの硬度は、モース硬度で4.0より低い、
請求項1から9のいずれか一項に記載の電力用半導体素子(1)。 - −前記導電層(111)、前記支持ブロック(113)、及び前記ボンディングブロック(112)は、前記支持ブロック(113)内の負荷電流の流れの方向(Z)に平行に延びる導電スタックを形成する、
請求項1から10のいずれか一項に記載の電力用半導体素子(1)。 - 前記導電スタックは2つ以上の支持ブロック(113)を含み、前記支持ブロック(113)のそれぞれは、互いの上に配置されるか、前記方向(Z)に沿って互いに間隔を置いて配置される、請求項11に記載の電力用半導体素子(1)。
- −前記導電層(111)の厚さ(T1)は、前記方向(Z)に沿って200nmから10μmの範囲であり、
−前記支持ブロック(113)の厚さ(T3)は、前記方向(Z)に沿って50nmから2000nmの範囲であり、
−前記ボンディングブロック(112)の厚さ(T2)は、前記方向(Z)に沿って5μmから50μmの範囲である、
請求項11に記載の電力用半導体素子(1)。 - −前記第1の負荷端子構造物(11)の前記導電層(111)は、メタライゼーション(111−1)と、前記メタライゼーション(111−1)を前記半導体構造物(10)と結合する拡散障壁(111−2)と、を含む、
請求項1から13のいずれか一項に記載の電力用半導体素子(1)。 - 前記導電層(111)及び前記支持ブロック(113)の少なくとも一方の中に配置されたゾーンであって、窒素原子を有する前記ゾーンをさらに備え、
前記ゾーンは、前記拡散障壁(111−2)の中に配置され、最大窒素原子濃度が1e14cm−3超である、請求項14に記載の電力用半導体素子(1)。 - 前記拡散障壁(111−2)は、同じか異なる障壁材料の多層スタックを含む、請求項15に記載の電力用半導体素子(1)。
- 前記障壁材料は、チタン、タングステン、タンタル、チタンタングステン、窒化チタン、アルミニウム、アルミニウム銅、アルミニウムシリコン銅のうちの少なくとも1つを含む、請求項16に記載の電力用半導体素子(1)。
- 電力用半導体素子(1)と、少なくとも1本のボンドワイヤ(3)と、パッケージング(4)と、を備える電力用半導体モジュール(5)であって、前記電力用半導体素子(1)は、
−第1の負荷端子構造物(11)と、前記第1の負荷端子構造物(11)から離されて配置される第2の負荷端子構造物(12)と、
−前記第1の負荷端子構造物(11)及び前記第2の負荷端子構造物(12)のそれぞれと電気的に結合され、負荷電流を通すように構成された半導体構造物(10)と、を備え、
前記第1の負荷端子構造物(11)は、
−前記半導体構造物(10)と接触する導電層(111)と、
−少なくとも1本のボンドワイヤ(3)の端部(31)に接触され、前記少なくとも1本のボンドワイヤ(3)及び前記導電層(111)の少なくとも一方からの負荷電流の少なくとも一部を受けるように構成されたボンディングブロック(112)と、
−前記導電層(111)及び前記ボンディングブロック(112)のそれぞれの硬度より高い硬度を有する支持ブロック(113)であって、前記ボンディングブロック(112)は、前記支持ブロック(113)を介して前記導電層(111)の上にマウントされる、前記支持ブロック(113)と、
を備え、
−前記パッケージング(4)は、前記電力用半導体素子(1)の少なくとも一部分を囲み、前記少なくとも1本のボンドワイヤ(3)の他方の端部(32)が接触する負荷電流インタフェース(41)を備え、
前記ボンディングブロック(112)及び前記導電層(111)は銅を含み、
前記支持ブロック(113)の前記負荷電流の流れる方向と平行な方向の厚さは、前記ボンディングブロック(112)の同方向の厚さの10分の1より小さい、
電力用半導体モジュール(5)。 - 電力用半導体素子(1)と、少なくとも1本のボンドワイヤ(3)と、パッケージング(4)と、を備える電力用半導体モジュール(5)であって、前記電力用半導体素子(1)は、
−第1の負荷端子構造物(11)と、前記第1の負荷端子構造物(11)から離されて配置される第2の負荷端子構造物(12)と、
−前記第1の負荷端子構造物(11)及び前記第2の負荷端子構造物(12)のそれぞれと電気的に結合され、負荷電流を通すように構成された半導体構造物(10)と、を備え、
前記第1の負荷端子構造物(11)は、
−前記半導体構造物(10)と接触する導電層(111)と、
−少なくとも1本のボンドワイヤ(3)の端部(31)に接触され、前記少なくとも1本のボンドワイヤ(3)及び前記導電層(111)の少なくとも一方からの負荷電流の少なくとも一部を受けるように構成されたボンディングブロック(112)と、
−前記導電層(111)及び前記ボンディングブロック(112)のそれぞれの硬度より高い硬度を有する支持ブロック(113)であって、前記ボンディングブロック(112)は、前記支持ブロック(113)を介して前記導電層(111)の上にマウントされる、前記支持ブロック(113)と、
を備え、
−前記パッケージング(4)は、前記電力用半導体素子(1)の少なくとも一部分を囲み、前記少なくとも1本のボンドワイヤ(3)の他方の端部(32)が接触する負荷電流インタフェース(41)を備え、
前記ボンディングブロック(112)及び前記導電層(111)は銅を含み、
前記導電層(111)の前記負荷電流の流れる方向と平行な方向の厚さは、前記ボンディングブロック(112)の同方向の厚さの10分の1より小さい、
電力用半導体モジュール(5)。 - 電力用半導体素子(1)を製造する方法(2)であって、前記方法(2)は、表面(10−1)を有する半導体構造物(10)を設けるステップ(21)と、前記表面(10−1)の上に第1の負荷端子構造物(11)を作成するステップと、を含み、前記作成するステップは、
−前記表面(10−1)で前記半導体構造物(10)と接触する導電層(111)を形成するステップ(22)と、
−前記導電層(111)の上に少なくとも1つの支持ブロック(113)を堆積させるステップ(23)と、
−前記少なくとも1つの支持ブロック(113)の上にボンディングブロック(112)をマウントするステップ(24)と、を含み、
−前記少なくとも1つの支持ブロック(113)の硬度は、前記導電層(111)及び前記ボンディングブロック(112)のそれぞれの硬度より高く、
−前記ボンディングブロック(112)は、少なくとも1本のボンドワイヤ(3)の端部(31)と接触するように構成され、且つ、前記少なくとも1本のボンドワイヤ(3)及び前記導電層(111)の少なくとも一方から負荷電流の少なくとも一部を受けるように構成され、
前記ボンディングブロック(112)及び前記導電層(111)は銅を含み、
前記支持ブロック(113)の前記負荷電流の流れる方向と平行な方向の厚さは、前記ボンディングブロック(112)の同方向の厚さの10分の1より小さい、
方法(2)。 - 電力用半導体素子(1)を製造する方法(2)であって、前記方法(2)は、表面(10−1)を有する半導体構造物(10)を設けるステップ(21)と、前記表面(10−1)の上に第1の負荷端子構造物(11)を作成するステップと、を含み、前記作成するステップは、
−前記表面(10−1)で前記半導体構造物(10)と接触する導電層(111)を形成するステップ(22)と、
−前記導電層(111)の上に少なくとも1つの支持ブロック(113)を堆積させるステップ(23)と、
−前記少なくとも1つの支持ブロック(113)の上にボンディングブロック(112)をマウントするステップ(24)と、を含み、
−前記少なくとも1つの支持ブロック(113)の硬度は、前記導電層(111)及び前記ボンディングブロック(112)のそれぞれの硬度より高く、
−前記ボンディングブロック(112)は、少なくとも1本のボンドワイヤ(3)の端部(31)と接触するように構成され、且つ、前記少なくとも1本のボンドワイヤ(3)及び前記導電層(111)の少なくとも一方から負荷電流の少なくとも一部を受けるように構成され、
前記ボンディングブロック(112)及び前記導電層(111)は銅を含み、
前記導電層(111)の前記負荷電流の流れる方向と平行な方向の厚さは、前記ボンディングブロック(112)の同方向の厚さの10分の1より小さい、
方法(2)。 - 前記導電層(111)を形成する前記ステップ(22)は、前記半導体構造物(10)の前記表面(10−1)に拡散障壁(111−2)を形成し、前記拡散障壁(111−2)の上にメタライゼーション(111−1)を形成するステップを含む、請求項20又は21に記載の方法(2)。
- 前記少なくとも1つの支持ブロック(113)を堆積させる前記ステップ(23)は、マスクを使用して前記少なくとも1つの支持ブロック(113)を構築するステップを含む、請求項20から22のいずれか一項に記載の方法(2)。
- 前記設けられた半導体構造物(10)は、活性領域(1−1)と、前記活性領域(1−1)を取り囲む非活性エッジ構造物(1−2)と、を含み、前記活性領域(1−1)は負荷電流を通すように構成され、前記マスクを使用することは、前記少なくとも1つの支持ブロック(113)が、前記活性領域(1−1)の上にのみ設けられ、前記非活性エッジ構造物(1−2)の上には設けられないように、行われる、請求項23に記載の方法(2)。
- 前記少なくとも1つの支持ブロック(113)の上に前記ボンディングブロック(112)をマウントする前記ステップ(24)は、別のマスクを使用して、前記少なくとも1つの支持ブロック(113)の場合と同様に前記ボンディングブロック(112)を構築するステップを含む、請求項23又は24に記載の方法(2)。
- 窒素原子を有し、前記導電層(111)及び前記支持ブロック(113)の少なくとも一方の中に配置されるゾーンを形成するステップの一環として、前記堆積された少なくとも1つの支持ブロック(113)の表面(113−10)に窒素を与えるステップを更に含む、請求項22から25のいずれか一項に記載の方法(2)。
- 前記堆積された少なくとも1つの支持ブロック(113)に対して熱アニール工程が実施される、請求項20から26のいずれか一項に記載の方法(2)。
- 前記少なくとも1つの支持ブロック(113)の上に前記ボンディングブロック(112)をマウントする前記ステップ(24)は、
−前記支持ブロック(113)の上にシード層(112−1)を堆積させるステップと、
−前記シード層(112−1)の上に金属をガルバニックに堆積させるステップと、を含む、
請求項20から27のいずれか一項に記載の方法(2)。 - 前記導電層(111)の前記負荷電流の流れる方向と平行な方向の厚さは、前記ボンディングブロック(112)の同方向の厚さの10分の1より小さい、
請求項1に記載の電力用半導体素子(1)。 - 前記導電層(111)の前記負荷電流の流れる方向と平行な方向の厚さは、前記ボンディングブロック(112)の同方向の厚さの10分の1より小さい、
請求項18に記載の電力用半導体モジュール(5)。 - 前記導電層(111)の前記負荷電流の流れる方向と平行な方向の厚さは、前記ボンディングブロック(112)の同方向の厚さの10分の1より小さい、
請求項20に記載の方法(2)。
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