JP6895834B2 - パワーデバイス - Google Patents
パワーデバイス Download PDFInfo
- Publication number
- JP6895834B2 JP6895834B2 JP2017141692A JP2017141692A JP6895834B2 JP 6895834 B2 JP6895834 B2 JP 6895834B2 JP 2017141692 A JP2017141692 A JP 2017141692A JP 2017141692 A JP2017141692 A JP 2017141692A JP 6895834 B2 JP6895834 B2 JP 6895834B2
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- JP
- Japan
- Prior art keywords
- metal layer
- layer
- power device
- configuration
- insulating member
- 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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- 239000002184 metal Substances 0.000 claims description 219
- 229910052751 metal Inorganic materials 0.000 claims description 219
- 239000000758 substrate Substances 0.000 claims description 58
- 229910000679 solder Inorganic materials 0.000 claims description 50
- 150000004767 nitrides Chemical class 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 5
- 239000010410 layer Substances 0.000 description 237
- 230000004048 modification Effects 0.000 description 81
- 238000012986 modification Methods 0.000 description 81
- 239000011521 glass Substances 0.000 description 55
- 239000010936 titanium Substances 0.000 description 21
- 230000000694 effects Effects 0.000 description 18
- 239000004065 semiconductor Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- 239000011248 coating agent Substances 0.000 description 11
- 238000000576 coating method Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 11
- 230000001681 protective effect Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 7
- 238000004544 sputter deposition Methods 0.000 description 7
- 238000001459 lithography Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000003667 anti-reflective effect Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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Description
図1は、本発明の実施の形態1に係るパワーデバイス100の平面図である。図1において、X方向、Y方向およびZ方向は、互いに直交する。以下の図に示されるX方向、Y方向およびZ方向も、互いに直交する。以下においては、X方向と、当該X方向の反対の方向(−X方向)とを含む方向を「X軸方向」ともいう。また、以下においては、Y方向と、当該Y方向の反対の方向(−Y方向)とを含む方向を「Y軸方向」ともいう。また、以下においては、Z方向と、当該Z方向の反対の方向(−Z方向)とを含む方向を「Z軸方向」ともいう。
次に、本発明の特徴的な構成(以下、「構成Ct1」ともいう)について説明する。構成Ct1は、絶縁部材X10を利用した構成である。
以下においては、本変形例の構成を「構成Ctm1」ともいう。構成Ctm1では、絶縁部材X10が、ガラスコート膜で構成されている。構成Ctm1は、構成Ct1(実施の形態1)に適用される。
以下においては、本変形例の構成を「構成Ctm2」ともいう。構成Ctm2では、絶縁部材X10が、ドット状(点状)に配置された複数の絶縁部w1から構成されている。絶縁部w1は、例えば、ガラスコート膜4を構成する材料と同じ材料で構成される。構成Ctm2は、構成Ct1(実施の形態1)および構成Ctm1(変形例1)の全てまたは一部に適用される。
以下においては、本変形例の構成を「構成Ctm3」ともいう。構成Ctm3では、はんだ層Sd1の側面側の形状は、フィレット形状である。すなわち、はんだ層Sd1の側面には、フィレットFtが形成されている。
以下においては、本変形例の構成を「構成Ctm4」ともいう。構成Ctm4では、パワーデバイス100は、さらに、Ti層5を備える。また、構成Ctm4では、絶縁部材X10が、Ti層5上に設けられている。すなわち、構成Ctm4では、絶縁部材X10の下に、Ti層5が存在する。Ti層5は、Ti(チタン)で構成されている。
以下においては、本変形例の構成を「構成Ctm5」ともいう。構成Ctm5では、金属層12の端部12eのうち、絶縁部材X10の上方の領域には、くぼみV1が形成されている。
以下においては、本変形例の構成を「構成Ctm6」ともいう。構成Ctm6では、絶縁部材X10の厚みは、金属層12の厚みより小さい。また、金属層12の端部12eの厚みは、当該端部12eの端(エッジ12ed)に向かって、段階的に小さくなっている。また、構成Ctm6では、絶縁部材X10のうち、金属層12の端(エッジ12ed)に近い部分程、当該部分の密度が高くなるように、当該絶縁部材X10は構成されている。
以下においては、本変形例の構成を「構成Ctm7」ともいう。構成Ctm7は、構成Ctm4を構成Ctm6に適用した構成である。構成Ctm7では、絶縁部材X10が、Ti層5上に設けられている。すなわち、構成Ctm4では、絶縁部材X10の下に、Ti層5が存在する。
以下においては、本変形例の構成を「構成Ctm8」ともいう。構成Ctm8は、構成Ctm2を構成Ctm6に適用した構成である。
以下においては、本変形例の構成を「構成Ctm9」ともいう。構成Ctm9では、金属層15が、硬度の異なる複数の層(部材)で構成されている。以下においては、硬度の異なる複数の層(部材)で構成されている金属層15を、「金属層15A」ともいう。
Claims (15)
- 基板の一方主面側に第1主電極が設けられ、当該基板の他方主面側に第2主電極が設けられたパワーデバイスであって、
前記基板の前記一方主面側に設けられ、当該一方主面と電気的に接続されている第1金属層と、
前記第1金属層上に形成されている第2金属層とを備え、
前記第1主電極は、前記第1金属層および前記第2金属層を含み、
前記第2金属層上には、はんだ層が設けられており、
前記パワーデバイスは、さらに、
前記第1金属層の第1端部と、当該第1端部と対向している、前記第2金属層の第2端部とにより囲まれている絶縁部材を備え、
前記第1金属層の前記第1端部が、前記第2金属層の前記第2端部と部分的に接続するように、前記絶縁部材は構成されており、
前記第2金属層の前記第2端部のうち、前記絶縁部材の上方の領域には、くぼみが形成されている
パワーデバイス。 - 基板の一方主面側に第1主電極が設けられ、当該基板の他方主面側に第2主電極が設けられたパワーデバイスであって、
前記基板の前記一方主面側に設けられ、当該一方主面と電気的に接続されている第1金属層と、
前記第1金属層上に形成されている第2金属層とを備え、
前記第1主電極は、前記第1金属層および前記第2金属層を含み、
前記第2金属層上には、はんだ層が設けられており、
前記パワーデバイスは、さらに、
前記第1金属層の第1端部と、当該第1端部と対向している、前記第2金属層の第2端部とにより囲まれている絶縁部材を備え、
前記第1金属層の前記第1端部が、前記第2金属層の前記第2端部と部分的に接続するように、前記絶縁部材は構成されており、
前記絶縁部材の厚みは、前記第2金属層の厚みより小さく、
前記第2金属層の前記第2端部の厚みは、当該第2端部の端に向かって、段階的に小さくなっている
パワーデバイス。 - 基板の一方主面側に第1主電極が設けられ、当該基板の他方主面側に第2主電極が設けられたパワーデバイスであって、
前記基板の前記一方主面側に設けられ、当該一方主面と電気的に接続されている第1金属層と、
前記第1金属層上に形成されている第2金属層とを備え、
前記第1主電極は、前記第1金属層および前記第2金属層を含み、
前記第2金属層上には、はんだ層が設けられており、
前記パワーデバイスは、さらに、
前記第1金属層の第1端部と、当該第1端部と対向している、前記第2金属層の第2端部とにより囲まれている絶縁部材を備え、
前記第1金属層の前記第1端部が、前記第2金属層の前記第2端部と部分的に接続するように、前記絶縁部材は構成されており、
平面視において、前記絶縁部材は、前記はんだ層の周縁部に沿って設けられており、
前記絶縁部材は、サイズの異なる複数の絶縁膜から構成されており、
前記複数の絶縁膜の各々の形状は、リング状である
パワーデバイス。 - 基板の一方主面側に第1主電極が設けられ、当該基板の他方主面側に第2主電極が設けられたパワーデバイスであって、
前記基板の前記一方主面側に設けられ、当該一方主面と電気的に接続されている第1金属層と、
前記第1金属層上に形成されている第2金属層とを備え、
前記第1主電極は、前記第1金属層および前記第2金属層を含み、
前記第2金属層上には、はんだ層が設けられており、
前記パワーデバイスは、さらに、
前記第1金属層の第1端部と、当該第1端部と対向している、前記第2金属層の第2端部とにより囲まれている絶縁部材を備え、
前記第1金属層の前記第1端部が、前記第2金属層の前記第2端部と部分的に接続するように、前記絶縁部材は構成されており、
前記絶縁部材は、酸化膜または窒化膜で構成されており、
前記パワーデバイスは、さらに、Ti層を備え、
前記絶縁部材は、前記Ti層上に設けられている
パワーデバイス。 - 基板の一方主面側に第1主電極が設けられ、当該基板の他方主面側に第2主電極が設けられたパワーデバイスであって、
前記基板の前記一方主面側に設けられ、当該一方主面と電気的に接続されている第1金属層と、
前記第1金属層上に形成されている第2金属層とを備え、
前記第1主電極は、前記第1金属層および前記第2金属層を含み、
前記第2金属層上には、はんだ層が設けられており、
前記パワーデバイスは、さらに、
前記第1金属層の第1端部と、当該第1端部と対向している、前記第2金属層の第2端部とにより囲まれている絶縁部材を備え、
前記第1金属層の前記第1端部が、前記第2金属層の前記第2端部と部分的に接続するように、前記絶縁部材は構成されており、
前記第1金属層は、
第1層と、
前記第1層上に設けられている第2層とを含み、
前記第2層の硬度は、前記第1層の硬度より低く、
前記第2層は、前記第2金属層に接する
パワーデバイス。 - 前記第2金属層の前記第2端部のうち、前記絶縁部材の上方の領域には、くぼみが形成されている
請求項2から5のいずれか1項に記載のパワーデバイス。 - 前記絶縁部材の厚みは、前記第2金属層の厚みより小さく、
前記第2金属層の前記第2端部の厚みは、当該第2端部の端に向かって、段階的に小さくなっている
請求項1,3,4、5のいずれか1項に記載のパワーデバイス。 - 平面視において、前記絶縁部材は、前記はんだ層の周縁部に沿って設けられている
請求項1,2,4,5のいずれか1項に記載のパワーデバイス。 - 前記絶縁部材は、サイズの異なる複数の絶縁膜から構成されており、
前記複数の絶縁膜の各々の形状は、リング状である
請求項8に記載のパワーデバイス。 - 前記絶縁部材は、ドット状に配置された複数の絶縁部から構成されている
請求項8に記載のパワーデバイス。 - 前記絶縁部材のうち、前記第2金属層の端に近い部分程、当該部分の密度が高くなるように、当該絶縁部材は構成されている
請求項1から10のいずれか1項に記載のパワーデバイス。 - 前記絶縁部材は、酸化膜または窒化膜で構成されている
請求項1,2,3,5,6,7,8,9,10,11のいずれか1項に記載のパワーデバイス。 - 前記パワーデバイスは、さらに、Ti層を備え、
前記絶縁部材は、前記Ti層上に設けられている
請求項12に記載のパワーデバイス。 - 前記はんだ層の側面側の形状は、フィレット形状である
請求項1から13のいずれか1項に記載のパワーデバイス。 - 前記第1金属層は、
第1層と、
前記第1層上に設けられている第2層とを含み、
前記第2層の硬度は、前記第1層の硬度より低く、
前記第2層は、前記第2金属層に接する
請求項1,2,3,4,6,7,8,9,10,11,12,13,14のいずれか1項に記載のパワーデバイス。
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