JP5006081B2 - 半導体装置、その製造方法、複合金属体及びその製造方法 - Google Patents
半導体装置、その製造方法、複合金属体及びその製造方法 Download PDFInfo
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- JP5006081B2 JP5006081B2 JP2007084265A JP2007084265A JP5006081B2 JP 5006081 B2 JP5006081 B2 JP 5006081B2 JP 2007084265 A JP2007084265 A JP 2007084265A JP 2007084265 A JP2007084265 A JP 2007084265A JP 5006081 B2 JP5006081 B2 JP 5006081B2
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Images
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Description
Claims (19)
- 半導体素子と、
Cu、Ni、Au、Ag及びそれらの合金からなる群から選ばれた材料よりなる電極と、前記半導体素子と該電極とを接合する接合層とを備え、
該接合層は、粒径1μm〜50μmの酸化第二銅微粒子を還元して得られた銅から構成され、
前記接合層は前記電極を構成する金属粒子の1/5以下の銅結晶粒子を含み、
前記銅結晶粒子と前記電極との接合界面に相互拡散領域を有することを特徴とする半導体装置。 - 請求項1において、前記酸化第二銅微粒子を還元して得られる銅は、粒径が100nm以下の銅粒子が融着して得られたものであることを特徴とする半導体装置。
- 請求項2において、前記接合層と前記電極との境界に酸化物層が実質的に存在しないことを特徴とする半導体装置。
- 請求項2において、前記接合層の熱伝導率が50乃至430W/mKであることを特徴とする半導体装置。
- 請求項2において、前記電極はCuまたはNiであることを特徴とする半導体装置。
- セラミック絶縁基板と、
該セラミック絶縁基板に接合され両面に配線層を有する配線基板と、
前記配線基板の一方の面に接続された半導体素子と、
前記配線基板の他方の面に接続された支持部材と、
前記半導体素子と接続される前記配線層上に形成されたNi又はCuで構成された被覆層とを有し、
前記半導体素子は粒径1μm〜50μmの酸化第二銅微粒子を還元して得られた銅粒子の接合層を介して前記配線基板の一方の面に接合され、
前記接合層は前記被覆層を構成するNi粒子またはCu粒子の大きさの1/5以下の大きさの銅結晶粒を含み、
前記銅結晶粒と前記被覆層との接合界面に相互拡散領域を有することを特徴とする半導体装置。 - 請求項6において、前記酸化第二銅微粒子を還元して得られる銅は、粒径が100nm以下の銅粒子が融着して得られたものであることを特徴とする半導体装置。
- 半導体素子と、
Cu、Ni、Au、Ag及びそれらの合金からなる群から選ばれた材料よりなる電極と、
前記半導体素子と該電極との接合面に粒径1μm〜50μmの酸化第二銅粒子と有機物からなる還元剤との接合材を塗布又は注入し、該接合材を含む接合面を還元雰囲気中で加熱及び加圧をして、前記酸化第二銅微粒子を還元して粒径が100nm以下の銅粒子を形成させて融着させ、生成した銅粒子と前記電極との接合界面に相互拡散領域を形成して接合することを特徴とする半導体装置の製造方法。 - 加熱温度は50〜500℃であることを特徴とする請求項8記載の半導体装置の製造方法。
- 更に、前記接合材は有機溶剤を含むことを特徴とする請求項8記載の半導体装置の製造方法。
- 加圧圧力は、0.01〜10MPaであることを特徴とする請求項8〜10のいずれかに記載の半導体装置の製造方法。
- セラミック絶縁基板と、
該セラミック絶縁基板に接合され両面に配線層を有する配線基板と、
前記配線基板の一方の面に接続された半導体素子と、
前記配線基板の他方の面に接続された支持部材とを有し、
前記半導体素子と接続される前記配線層上に形成されたNi、Cu、Au,Ag及びそれらの合金からなる群から選ばれた材料で構成された被覆層の表面に、粒径1μm〜50μmの酸化第二銅微粒子と有機物からなる還元剤を含む接合材を付与し、これを還元雰囲気中で加熱及び加圧して、前記酸化第二銅微粒子を還元して100nm以下の銅粒子を生成させて融着させ、生成する銅粒子と前記被覆層との接合界面に相互拡散領域を形成して前記配線基板の前記配線層上に前記半導体素子を接合することを特徴とする半導体装置の製造方法。 - 上記加熱温度は50〜500℃であることを特徴とする請求項12記載の半導体装置の製造方法。
- 更に、前記接合材は有機溶剤を含むことを特徴とする請求項12記載の半導体装置の製造方法。
- 加圧圧力は、0.01〜10MPaであることを特徴とする請求項12〜14のいずれかに記載の半導体装置の製造方法。
- 半導体素子の電極または前記半導体素子の電気信号を外部に取り出すための配線の少なくとも一方がCuまたはNiで構成され、前記半導体素子の電極と前記配線とを接合する半導体装置の製造方法であって、
平均粒径が1μm〜50μmの酸化第2銅粒子と、有機物からなる還元剤とを含む接合材料を前記半導体素子と前記配線との接合面に付与し、前記接合材料を還元性雰囲気下で加熱及び加圧して焼成して、前記酸化第二銅微粒子を還元して粒径が100nm以下の銅粒子を形成して融着させ、生成した銅粒子と前記被覆層との接合界面に相互拡散領域を形成して前記電極と前記配線とをCu焼成層を介して接合する工程を有することを特徴とする半導体装置の製造方法。 - 前記電極と配線とを前記Cu焼成層により接合する工程において、0.01乃至10MPaの加圧下で、50乃至500℃に加熱することを特徴とする請求項16に記載の半導体装置の製造方法。
- 請求項1〜7のいずれかに記載の半導体装置を複数搭載していることを特徴とする電力変換装置。
- 請求項18に記載の電力変換装置がエンジンルームに搭載されることを特徴とするハイブリッド自動車。
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