JP6652003B2 - 半導体チップおよび半導体装置 - Google Patents
半導体チップおよび半導体装置 Download PDFInfo
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- JP6652003B2 JP6652003B2 JP2016132565A JP2016132565A JP6652003B2 JP 6652003 B2 JP6652003 B2 JP 6652003B2 JP 2016132565 A JP2016132565 A JP 2016132565A JP 2016132565 A JP2016132565 A JP 2016132565A JP 6652003 B2 JP6652003 B2 JP 6652003B2
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- 239000004065 semiconductor Substances 0.000 title claims description 146
- 239000000463 material Substances 0.000 claims description 112
- 239000010410 layer Substances 0.000 claims description 95
- 230000001681 protective effect Effects 0.000 claims description 52
- 239000011241 protective layer Substances 0.000 claims description 36
- 230000006378 damage Effects 0.000 claims description 12
- 230000017525 heat dissipation Effects 0.000 claims description 11
- 230000005855 radiation Effects 0.000 claims description 9
- 229910044991 metal oxide Inorganic materials 0.000 claims description 8
- 150000004706 metal oxides Chemical class 0.000 claims description 8
- 229910052709 silver Inorganic materials 0.000 claims 1
- 239000004332 silver Substances 0.000 claims 1
- 239000000758 substrate Substances 0.000 description 14
- 230000015556 catabolic process Effects 0.000 description 6
- 210000000746 body region Anatomy 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229910005191 Ga 2 O 3 Inorganic materials 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- -1 RuO 2 Chemical class 0.000 description 1
- 239000005380 borophosphosilicate glass Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Description
また、請求項1は、さらに、接合部材は、保護材料と共に、保護材料より抵抗率が低い基礎材料を含んで構成され、保護材料で構成される保護層(30b)と、基礎材料で構成される基礎層(30a)とを有し、保護層と基礎層とが積層されて構成されていると共に、保護層と基礎層との積層方向において、基礎層が接続されている。
請求項3は、さらに、接合部材は、保護材料と共に、保護材料より抵抗率が低い基礎材料を含んで構成され、保護材料で構成される保護層(30b)と、基礎材料で構成される基礎層(30a)とを有し、接合部材は、半導体チップの平面方向において、保護層と基礎層とが分割して配置された構成とされている。
そして、請求項7は、さらに、電極部は、保護材料と共に、保護材料より抵抗率が低い基礎材料を含んで構成され、保護材料で構成される保護層(30b)と、基礎材料で構成される基礎層(30a)とを有し、保護層と基礎層とが積層されて構成されていると共に、保護層と基礎層との積層方向において、基礎層が接続されている。
請求項8は、さらに、保護材料と共に、保護材料より抵抗率が低い基礎材料を含んで構成され、保護材料で構成される保護層(30b)と、基礎材料で構成される基礎層(30a)とを有し、半導体チップの平面方向において、保護層と基礎層とが分割して配置された構成とされている。
第1実施形態について図面を参照しつつ説明する。本実施形態の半導体装置は、図1に示されるように、第1放熱部材1上に半導体チップ2が搭載され、半導体チップ2上に放熱ブロック3を介して第2放熱部材4が配置されることで構成されている。また、第1放熱部材1と半導体チップ2との間には第1接合部材5が配置され、半導体チップ2と放熱ブロック3との間には第2接合部材6が配置され、放熱ブロック3と第2放熱部材4との間には第3接合部材7が配置されている。さらに、後述するように、本実施形態の半導体チップ2には、ゲートパッド20が備えられており、当該ゲートパッド20は、ゲート端子8とボンディングワイヤ9を介して電気的に接続されている。なお、本実施形態では、ボンディングワイヤ9が外部部材に相当している。
第2実施形態について説明する。本実施形態は、第1実施形態に対して、第1〜第3接合部材5〜7の構成を変更したものであり、その他に関しては第1実施形態と同様であるため、ここでは説明を省略する。
第3実施形態について説明する。本実施形態は、第2実施形態に対して、第1〜第3接合部材5〜7の構成を変更したものであり、その他に関しては第2実施形態と同様であるため、ここでは説明を省略する。
第4実施形態について説明する。本実施形態は、第2実施形態と第3実施形態とを組み合わせたものであり、その他に関しては第1実施形態と同様であるため、ここでは説明を省略する。
第5実施形態について説明する。本実施形態は、第1実施形態に対して、ゲートパッド20の構成を変更したものであり、その他に関しては第1実施形態と同様であるため、ここでは説明を省略する。
本発明は上記した実施形態に限定されるものではなく、特許請求の範囲に記載した範囲内において適宜変更が可能である。
5 第1接合部材
6 第2接合部材
7 第3接合部材
20 ゲート電極
30a 基礎層
30b 保護層
Claims (10)
- 電極部(19、24)を有する半導体チップ(2)の当該電極部が接合部材(5〜7)と電気的に接続され、前記接合部材を介して前記半導体チップに電流が流れる半導体装置において、
前記半導体チップと、
前記電極部と電気的に接続される前記接合部材と、を備え、
前記接合部材は、抵抗率の温度係数が正であり、前記半導体チップが破壊される破壊温度よりも低い所定温度を閾値温度としたとき、前記閾値温度よりも高い温度側の抵抗率の温度係数が前記閾値温度よりも低い温度側の抵抗率の温度係数より大きい保護材料を含んで構成されており、前記保護材料と共に、前記保護材料より抵抗率が低い基礎材料を含んで構成され、前記保護材料で構成される保護層(30b)と、前記基礎材料で構成される基礎層(30a)とを有し、前記保護層と前記基礎層とが積層されて構成されていると共に、前記保護層と前記基礎層との積層方向において、前記基礎層が接続されている半導体装置。 - 前記接合部材は、前記半導体チップの平面方向において、前記保護層と前記基礎層とが分割して配置された構成とされている請求項1に記載の半導体装置。
- 電極部(19、24)を有する半導体チップ(2)の当該電極部が接合部材(5〜7)と電気的に接続され、前記接合部材を介して前記半導体チップに電流が流れる半導体装置において、
前記半導体チップと、
前記電極部と電気的に接続される前記接合部材と、を備え、
前記接合部材は、抵抗率の温度係数が正であり、前記半導体チップが破壊される破壊温度よりも低い所定温度を閾値温度としたとき、前記閾値温度よりも高い温度側の抵抗率の温度係数が前記閾値温度よりも低い温度側の抵抗率の温度係数より大きい保護材料を含んで構成されており、前記保護材料と共に、前記保護材料より抵抗率が低い基礎材料を含んで構成され、前記保護材料で構成される保護層(30b)と、前記基礎材料で構成される基礎層(30a)とを有し、前記接合部材は、前記半導体チップの平面方向において、前記保護層と前記基礎層とが分割して配置された構成とされている半導体装置。 - 前記接合部材は、前記保護層と前記基礎層とが積層されて構成されている請求項3に記載の半導体装置。
- 前記基礎材料は、銀であり、
前記保護材料は、金属酸化物である請求項1ないし4のいずれか1つに記載の半導体装置。 - 第1放熱部材(1)と、
前記半導体チップを挟んで前記第1放熱部材と反対側に配置される第2放熱部材(4)と、を有し、
前記半導体チップは、前記第1放熱部材側に前記電極部としての第1電極(24)が形成されていると共に、前記第2放熱部材側に前記電極部としての第2電極(19)が形成されており、
前記接合部材は、前記第1放熱部材と前記第1電極との間に配置されて前記第1放熱部材と前記第1電極とを電気的に接続すると共に、前記第2放熱部材と前記第2電極との間に配置されて前記第2放熱部材と前記第2電極とを電気的に接続する請求項1ないし5のいずれか1つに記載の半導体装置。 - 電極部(17、19、20、21、24)を有すると共に半導体素子が形成された半導体チップにおいて、
前記電極部は、抵抗率の温度係数が正であり、前記半導体素子が破壊される破壊温度よりも低い所定温度を閾値温度としたとき、前記閾値温度よりも高い温度側の抵抗率の温度係数が前記閾値温度よりも低い温度側の抵抗率の温度係数より大きい保護材料を含んで構成されており、前記保護材料と共に、前記保護材料より抵抗率が低い基礎材料を含んで構成され、前記保護材料で構成される保護層(30b)と、前記基礎材料で構成される基礎層(30a)とを有し、前記保護層と前記基礎層とが積層されて構成されていると共に、前記保護層と前記基礎層との積層方向において、前記基礎層が接続されている半導体チップ。 - 電極部(17、19、20、21、24)を有すると共に半導体素子が形成された半導体チップにおいて、
前記電極部は、抵抗率の温度係数が正であり、前記半導体素子が破壊される破壊温度よりも低い所定温度を閾値温度としたとき、前記閾値温度よりも高い温度側の抵抗率の温度係数が前記閾値温度よりも低い温度側の抵抗率の温度係数より大きい保護材料を含んで構成されており、前記保護材料と共に、前記保護材料より抵抗率が低い基礎材料を含んで構成され、前記保護材料で構成される保護層(30b)と、前記基礎材料で構成される基礎層(30a)とを有し、前記半導体チップの平面方向において、前記保護層と前記基礎層とが分割して配置された構成とされている半導体チップ。 - チャネル層(12)と、
前記チャネル層に絶縁膜(16)を介して配置されたゲート電極(17)と、
外部部材(9)と電気的に接続されるゲートパッド(20)と、
前記ゲートパッドと前記ゲート電極とを電気的に接続するゲート配線(21)と、を有し、
前記ゲートパッドに所定の駆動電圧が印加されることによって前記チャネル層に反転層が形成され、
前記電極部は、前記ゲート電極、前記ゲートパッド、および前記ゲート配線を有する構成とされ、前記ゲート電極、前記ゲートパッド、および前記ゲート配線の少なくとも1つが前記保護材料を含んで構成されている請求項7または8に記載の半導体チップ。 - 第1電極(24)と、
前記第1電極との間に電流を流す第2電極(19)と、を有し、
前記第1電極および前記第2電極の少なくとも1つが前記電極部として構成されている請求項7ないし9のいずれか1つに記載の半導体チップ。
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