JP2005244166A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP2005244166A JP2005244166A JP2004291397A JP2004291397A JP2005244166A JP 2005244166 A JP2005244166 A JP 2005244166A JP 2004291397 A JP2004291397 A JP 2004291397A JP 2004291397 A JP2004291397 A JP 2004291397A JP 2005244166 A JP2005244166 A JP 2005244166A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 306
- 229910000679 solder Inorganic materials 0.000 claims abstract description 188
- 229920005989 resin Polymers 0.000 claims abstract description 41
- 239000011347 resin Substances 0.000 claims abstract description 41
- 230000008646 thermal stress Effects 0.000 claims abstract description 35
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- 239000002184 metal Substances 0.000 claims description 126
- 229910052751 metal Inorganic materials 0.000 claims description 126
- 230000005855 radiation Effects 0.000 claims description 43
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000017525 heat dissipation Effects 0.000 abstract description 22
- 230000002411 adverse Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
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- 239000010949 copper Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000001721 transfer moulding Methods 0.000 description 1
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Abstract
【解決手段】 第1および第2の半導体チップ11、12と、半導体チップ11、12の裏面側に第1のはんだ51を介して接合された下側ヒートシンク20と、半導体チップ11、12の表面側に第2のはんだ52を介して接合された上側ヒートシンク30と、半導体チップ11、12、両ヒートシンク20、30を包み込むように封止するモールド樹脂60とを備え、半導体チップ11、12の表面が素子形成面となっている半導体装置S1において、各はんだ51、52、53によるはんだ接合部のうち第1のはんだ51の熱応力による歪み値が、最大となっている。
【選択図】 図1
Description
ところで、上記図1に示される例では、複数個の半導体チップ11、12の厚さt1、t1’が異なる場合、各半導体チップ11、12のヒートシンクブロック40の厚さt4、t4’や第3のはんだ53の厚さt5、t5’を変えることで、両放熱面21、31間の平行度を維持していた。
また、上記実施形態では、半導体素子11、12は複数個であったが、半導体素子は、1個であってもよい。
12…半導体素子としての第2の半導体チップ、
20…第1の金属体としての上側ヒートシンク、
30…第2の金属体としての下側ヒートシンク、
51…第1のはんだ、52…第2のはんだ、53…第3のはんだ、
55…金属粉、60…モールド樹脂、
t1…第1の半導体チップの厚さ、t1’…第2の半導体チップの厚さ、
t4…第1の半導体チップ側のヒートシンクブロックの厚さ、
t4’…第2の半導体チップ側のヒートシンクブロックの厚さ、
t5…第1の半導体チップ側の第3のはんだの厚さ、
t5’…第2の半導体チップ側の第3のはんだの厚さ。
Claims (12)
- 半導体素子(11、12)と、
前記半導体素子(11、12)の裏面側に第1のはんだ(51)を介して接合され、電極と放熱体とを兼ねる第1の金属体(20)と、
前記半導体素子(11、12)の表面側に第2のはんだ(52)を介して接合され、電極と放熱体とを兼ねる第2の金属体(30)と、
前記半導体素子(11、12)、前記第1の金属体(20)および前記第2の金属体(30)を包み込むように封止するモールド樹脂(60)とを備え、
前記半導体素子(11、12)は、前記表面が素子形成面となっている半導体装置において、
はんだ接合部のうち前記第1のはんだ(51)の熱応力による歪み値が、最大となっていることを特徴とする半導体装置。 - 前記第1のはんだ(51)は、前記半導体素子(11、12)の裏面の端部まで行き渡るように当該裏面の全域に形成されており、
前記第2のはんだ(52)は、その端部が前記半導体素子(11、12)の表面の端部とは距離を持つように当該表面の内周側の領域に形成されていることを特徴とする請求項1に記載の半導体装置。 - 前記半導体素子(11、12)は、平面サイズの異なる複数個のものからなり、
平面サイズの大きい半導体素子(11)ほど、厚さが小さくなっていることを特徴とする請求項1または2に記載の半導体装置。 - 前記半導体素子(11、12)は、平面サイズの大きいIGBT素子(11)と、これよりも平面サイズの小さいFWD素子(12)とからなることを特徴とする請求項3に記載の半導体装置。
- 前記第1のはんだ(51)は前記第2のはんだ(52)よりも薄いことを特徴とする請求項1ないし4のいずれか1つに記載の半導体装置。
- 1個の前記第1の金属体(20)とこれに対向する1個の前記第2の金属体(30)との間には、厚さ(t1、t1’)の異なる複数個の前記半導体素子(11、12)が平面的に配置されており、
これら複数個の前記半導体素子(11、12)は、前記1個の第1の金属体(20)と前記1個の第2の金属体(30)とに挟まれていることを特徴とする請求項1または2に記載の半導体装置。 - 前記1個の第1の金属体(20)の放熱面(21)および前記1個の第2の金属体(30)の放熱面(31)は、前記モールド樹脂(60)から露出していることを特徴とする請求項6に記載の半導体装置。
- 各々の前記半導体素子(11、12)における前記第2のはんだ(52)と前記1個の第2の金属体(30)との間には、各々の前記半導体素子(11、12)毎に別々の第3の金属体(40)が介在しており、
各々の前記半導体素子(11、12)と前記第3の金属体(40)とは、前記第2のはんだ(52)により接合され、
各々の前記第3の金属体(40)と前記1個の第2の金属体(30)とは、第3のはんだ(53)を介して接合されており、
前記1個の第1の金属体(20)の放熱面(21)と前記1個の第2の金属体(30)の放熱面(31)とが平行となるように、各々の前記第3の金属体(40)の厚さ(t4、t4’)が異なっていることを特徴とする請求項6または7に記載の半導体装置。 - 各々の前記半導体素子(11、12)における前記第2のはんだ(52)と前記1個の第2の金属体(30)との間には、各々の前記半導体素子(11、12)毎に別々の第3の金属体(40)が介在しており、
各々の前記半導体素子(11、12)と前記第3の金属体(40)とは、前記第2のはんだ(52)により接合され、
各々の前記第3の金属体(40)と前記1個の第2の金属体(30)とは、第3のはんだ(53)を介して接合されており、
前記1個の第1の金属体(20)の放熱面(21)と前記1個の第2の金属体(30)の放熱面(31)とが平行となるように、各々の前記第3のはんだ(53)の厚さ(t5、t5’)が異なっていることを特徴とする請求項6または7に記載の半導体装置。 - 前記1個の第2の金属体(30)における前記半導体素子(11、12)側の面には、凹凸が設けられており、
この凹凸によって前記1個の第1の金属体(20)の放熱面(21)と前記1個の第2の金属体(30)の放熱面(31)とが平行となっていることを特徴とする請求項6または7に記載の半導体装置。 - 前記第1のはんだ(51)および前記第2のはんだ(52)には、これらのはんだの高さを規定するための金属粉(55)が含有されていることを特徴とする請求項6ないし10のいずれか1つに記載の半導体装置。
- 前記厚さ(t1、t1’)の異なる複数個の前記半導体素子(11、12)は、比較的薄いIGBT素子(11)と、これよりも厚いFWD素子(12)とからなることを特徴とする請求項6ないし11のいずれか1つに記載の半導体装置。
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DE200510002767 DE102005002767A1 (de) | 2004-01-30 | 2005-01-20 | Halbleiteranordnung |
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