JP4539980B2 - 半導体装置およびその製造方法 - Google Patents
半導体装置およびその製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims description 264
- 238000004519 manufacturing process Methods 0.000 title claims description 38
- 239000004020 conductor Substances 0.000 claims description 143
- 229910000679 solder Inorganic materials 0.000 claims description 124
- 239000000758 substrate Substances 0.000 claims description 108
- 239000010419 fine particle Substances 0.000 claims description 99
- 239000000463 material Substances 0.000 claims description 98
- 229910052751 metal Inorganic materials 0.000 claims description 81
- 239000002184 metal Substances 0.000 claims description 81
- 238000000034 method Methods 0.000 claims description 18
- 238000002844 melting Methods 0.000 claims description 16
- 230000008018 melting Effects 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 15
- 229910007637 SnAg Inorganic materials 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 150000002739 metals Chemical class 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 229910052709 silver Inorganic materials 0.000 claims description 7
- 229910008433 SnCU Inorganic materials 0.000 claims description 6
- 229910006913 SnSb Inorganic materials 0.000 claims description 6
- 238000005304 joining Methods 0.000 description 18
- 238000001816 cooling Methods 0.000 description 11
- 238000005245 sintering Methods 0.000 description 8
- 239000003960 organic solvent Substances 0.000 description 5
- 239000002470 thermal conductor Substances 0.000 description 4
- 239000002923 metal particle Substances 0.000 description 3
- 229910001111 Fine metal Inorganic materials 0.000 description 2
- 229910015363 Au—Sn Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002082 metal nanoparticle Substances 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Description
図1は、本発明の実施の形態1にかかる半導体装置の要部を示す正面図である。図1に示すように、半導体素子14の裏面電極(図示省略)は、導体基板12の表面に金属微粒子の焼結体17よりなる接合部材を介して接合されている。その半導体素子14の表面電極(図示省略)には、配線用導体16が鉛フリーはんだ材料15を介して接合されている。ここで、配線用導体16と半導体素子14の表面電極(図示省略)は面接合しており、その接合面積は、従来のワイヤボンディング法によるワイヤの接着面積よりも大きい。
図3は、本発明の実施の形態2にかかる半導体装置の要部を示す正面図である。図3に示すように、実施の形態2では、導体基板12の表面と半導体素子14の裏面電極(図示省略)が鉛フリーはんだ材料15を介して接合されており、半導体素子14の表面電極(図示省略)と配線用導体16が金属微粒子の焼結体17を介して接合されている。その他の構成については、実施の形態1と同じであるので、説明を省略する。
図5は、本発明の実施の形態3にかかる半導体装置の要部を示す正面図である。図5に示すように、実施の形態3では、導体基板12の表面と半導体素子14の裏面電極(図示省略)、および半導体素子14の表面電極(図示省略)と配線用導体16がともに金属微粒子の焼結体17を介して接合されている。その他の構成については、実施の形態1と同じであるので、説明を省略する。
図7は、本発明の実施の形態4にかかる半導体装置の要部を示す正面図である。図7に示すように、実施の形態4では、半導体パッケージの外部冷却体への熱導体となる例えば金属基板よりなる熱伝導部材18の表面に、アルミナ等からなる絶縁基板11の裏面に設けられた熱伝導体13の裏面が鉛フリーはんだ材料15を介して接合されている。そして、絶縁基板11の表面に設けられた導体基板12の表面に実施の形態1の半導体装置(図1参照)が接合されている。導体基板12は、絶縁基板11の表面の電気回路を兼ねている。導体基板12上の半導体装置の構成については、実施の形態1と同じであるので、説明を省略する。
図9は、本発明の実施の形態5にかかる半導体装置の要部を示す正面図である。図9に示すように、実施の形態5は、実施の形態4において、絶縁基板11の導体基板12の表面に実施の形態2の半導体装置(図3参照)を接合したものである。導体基板12上の半導体装置の構成については、実施の形態2と同じである。その他の構成は、実施の形態4と同じである。従って、それらの説明を省略する。
12 導体基板
13 熱伝導体
14 半導体素子
15 鉛フリーはんだ材料
16 配線用導体
17 金属微粒子の焼結体
18 熱伝導部材
Claims (10)
- 半導体素子の裏面電極と導体基板が金属微粒子の焼結体を介して接合され、前記半導体素子の表面電極と配線用導体がはんだ材料を介して接合されていることを特徴とする半導体装置。
- 半導体素子の表面電極と配線用導体が金属微粒子の焼結体を介して接合され、前記半導体素子の裏面電極と導体基板がはんだ材料を介して接合されていることを特徴とする半導体装置。
- 半導体素子の表面電極と配線用導体がはんだ材料を介して接合され、前記半導体素子の裏面電極と、絶縁基板の表面に設けられた導体基板が金属微粒子の焼結体を介して接合され、前記絶縁基板の裏面に設けられた熱伝導体と熱伝導部材がはんだ材料を介して接合されていることを特徴とする半導体装置。
- 前記金属微粒子は、前記はんだ材料の溶融温度よりも高い耐熱性を有するAg、CuおよびNiのうちの1または2以上の金属を含む合金よりなることを特徴とする請求項1〜3のいずれか一つに記載の半導体装置。
- 前記はんだ材料は、鉛を含まないSnAg系、SnSb系またはSnCu系のはんだ材料であることを特徴とする請求項1〜3のいずれか一つに記載の半導体装置。
- 半導体素子の裏面電極と導体基板が金属微粒子の焼結体を介して接合され、前記半導体素子の表面電極と配線用導体がはんだ材料を介して接合された半導体装置を製造するにあたって、
前記裏面電極と前記導体基板を、金属微粒子を含むペーストを介して貼り合わせ、加熱して前記金属微粒子を焼結させることにより接合した後に、前記表面電極と前記配線用導体をはんだ材料を介して貼り合わせ、加熱して接合することを特徴とする半導体装置の製造方法。 - 半導体素子の表面電極と配線用導体が金属微粒子の焼結体を介して接合され、前記半導体素子の裏面電極と導体基板がはんだ材料を介して接合された半導体装置を製造するにあたって、
前記表面電極と前記配線用導体を、金属微粒子を含むペーストを介して貼り合わせ、加熱して前記金属微粒子を焼結させることにより接合した後に、前記裏面電極と前記導体基板をはんだ材料を介して貼り合わせ、加熱して接合することを特徴とする半導体装置の製造方法。 - 半導体素子の表面電極と配線用導体がはんだ材料を介して接合され、前記半導体素子の裏面電極と、絶縁基板の表面に設けられた導体基板が金属微粒子の焼結体を介して接合され、前記絶縁基板の裏面に設けられた熱伝導体と熱伝導部材がはんだ材料を介して接合された半導体装置を製造するにあたって、
前記裏面電極と前記導体基板を、金属微粒子を含むペーストを介して貼り合わせ、加熱して前記金属微粒子を焼結させることにより接合した後に、前記表面電極と前記配線用導体、および前記熱伝導体と前記熱伝導部材を、それぞれはんだ材料を介して貼り合わせ、加熱して接合することを特徴とする半導体装置の製造方法。 - 前記金属微粒子は、前記はんだ材料の溶融温度よりも高い耐熱性を有するAg、CuおよびNiのうちの1または2以上の金属を含む合金よりなることを特徴とする請求項6〜8のいずれか一つに記載の半導体装置の製造方法。
- 前記はんだ材料は、鉛を含まないSnAg系、SnSb系またはSnCu系のはんだ材料であることを特徴とする請求項6〜8のいずれか一つに記載の半導体装置の製造方法。
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