JP2006059998A - 伝熱シート、熱伝導構造体及び熱伝導構造体の製造方法 - Google Patents
伝熱シート、熱伝導構造体及び熱伝導構造体の製造方法 Download PDFInfo
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Abstract
【解決手段】 発熱体であるシリコンチップ1の接合面には、絶縁性樹脂4がパターン形成され、放熱体であるヒートシンク2の接合面(上側の面)には、絶縁性樹脂4に位置合せされて、絶縁性樹脂5がパターン形成されている。シリコンチップ1とヒートシンク2とは、伝熱シート3を介して接合されている。絶縁性樹脂4,5が形成されていない領域では、金属によってシリコンチップ1及びヒートシンク2が接合されて金属接続部3aとなっており、絶縁性樹脂4,5が形成されている領域では、樹脂によってシリコンチップ1及びヒートシンク2が接合されて樹脂接続部3bとなっている。
【選択図】 図1
Description
(感光液の組成)
ポリイミド前駆体ワニス:ポリイミド前駆体 50重量部
アクリルモノマ:トリメチロールプロパントリアクリレート 10 重量部
光反応開始剤:ベンゾフェノン 2重量部
(金属フィラーの組成)
Sn−Bi合金(平均粒径:8μm,融点:138℃)
Cu(Agメッキ品,平均粒径:35μm)
(Sn−BiフィラーとCuフィラーとの配合比率は1:1)
(樹脂(エポキシ樹脂)の組成)
主剤1:ビスフェノールF型エポキシ(EXA−830LVP:大日本インキ)
50重量部
主剤2:ナフタレン型エポキシ(HP−4032D:大日本インキ)
50重量部
硬化剤:酸無水物(KRM−291−5:旭電化) 100重量部
促進剤:イミダゾール(1M2EZ:四国化成) 0.1重量部
(付記2)前記複数の領域の形状は、ヒートスポット領域と該ヒートスポット領域以外の領域との形状と同じであることを特徴とする付記1記載の伝熱シート。
(付記3)前記金属は、融点が200℃以下である第1種金属と、該第1種金属より熱伝導性が高い第2種金属とを有することを特徴とする付記1または2記載の伝熱シート。 (付記4)前記第1種金属は、Sn−Bi合金,In−Sn−Bi合金,In−Bi合金,In−Sn合金,Pb−Sn合金,及びInからなる群から選ばれた金属であることを特徴とする付記3記載の伝熱シート。
(付記5)前記第2種金属は、Au,Ag,Cu,Sn,及びAlからなる群から選ばれた金属であることを特徴とする付記3記載の伝熱シート。
(付記6)発熱体と、放熱体と、該発熱体及び放熱体の間に設けられ、前記発熱体からの熱を前記放熱体へ伝導する伝熱シートとを備える熱伝導構造体において、前記伝熱シートは、金属と樹脂とを含んでおり、金属含有率が互いに異なる複数の領域を有することを特徴とする熱伝導構造体。
(付記7)前記発熱体には、温度が互いに異なる複数の領域が存在し、前記発熱体の高温側の領域に前記伝熱シートの金属含有率が多い方の領域を対応させていることを特徴とする付記6記載の熱伝導構造体。
(付記8)前記発熱体には、温度が互いに異なる複数の領域が存在し、前記発熱体の低温側の領域に前記伝熱シートの樹脂含有率が多い方の領域を対応させていることを特徴とする付記6記載の熱伝導構造体。
(付記9)前記金属は、融点が200℃以下である第1種金属と、該第1種金属より熱伝導性が高い第2種金属とを有することを特徴とする付記6乃至8のいずれかに記載の熱伝導構造体。
(付記10)前記第1種金属は、Sn−Bi合金,In−Sn−Bi合金,In−Bi合金,In−Sn合金,Pb−Sn合金,及びInからなる群から選ばれた金属であることを特徴とする付記9記載の熱伝導構造体。
(付記11)前記第2種金属は、Au,Ag,Cu,Sn,及びAlからなる群から選ばれた金属であることを特徴とする付記9記載の熱伝導構造体。
(付記12)発熱体と、放熱体と、該発熱体及び放熱体の間に接合され、前記発熱体からの熱を前記放熱体へ伝導する伝熱シートとを備える熱伝導構造体を製造する方法において、前記発熱体及び放熱体の接合面に絶縁性樹脂をパターン形成する工程と、前記絶縁性樹脂がパターン形成された前記発熱体及び/または放熱体の接合面に、金属と樹脂との混合材を塗布する工程と、前記発熱体及び放熱体にパターン形成された前記絶縁性樹脂を位置合せして、前記発熱体、混合材及び放熱体を加熱接合する工程とを有することを特徴とする熱伝導構造体の製造方法。
(付記13)前記発熱体及び放熱体の接合面への前記絶縁性樹脂のパターン形成率が接合面全体の60%以下であることを特徴とする付記12記載の熱伝導構造体の製造方法。 (付記14)前記混合材は、熱硬化性樹脂に熱伝導性の金属フィラーを分散させた材料であることを特徴とする付記12または13記載の熱伝導構造体の製造方法。
(付記15)前記金属フィラーは、融点が200℃以下の第1種金属フィラーと、該第1種金属フィラーより熱伝導性が高い第2種金属フィラーとを含むことを特徴とする付記14記載の熱伝導構造体の製造方法。
(付記16)前記第1種金属フィラーは、Sn−Bi合金,In−Sn−Bi合金,In−Bi合金,In−Sn合金,Pb−Sn合金,及びInからなる群から選ばれた材料であることを特徴とする付記15記載の熱伝導構造体の製造方法。
(付記17)前記第2種金属フィラーは、Au,Ag,Cu,Sn,及びAlからなる群から選ばれた材料であることを特徴とする付記15記載の熱伝導構造体の製造方法。
1a ヒートスポット
2 ヒートシンク(放熱体)
3 伝熱シート
3a 金属接続部
3b 樹脂接続部
4,5 絶縁性樹脂
6 混合材
10 熱伝導構造体
11 基材
12 感光液層
13 マスク
14 ポリイミド樹脂
Claims (6)
- 発熱体と放熱体との間に設けられ、前記発熱体からの熱を前記放熱体へ伝導する伝熱シートにおいて、金属と樹脂とを含んでおり、金属含有率が互いに異なる複数の領域を有することを特徴とする伝熱シート。
- 前記複数の領域の形状は、ヒートスポット領域と該ヒートスポット領域以外の領域との形状と同じであることを特徴とする請求項1記載の伝熱シート。
- 発熱体と、放熱体と、該発熱体及び放熱体の間に設けられ、前記発熱体からの熱を前記放熱体へ伝導する伝熱シートとを備える熱伝導構造体において、前記伝熱シートは、金属と樹脂とを含んでおり、金属含有率が互いに異なる複数の領域を有することを特徴とする熱伝導構造体。
- 前記発熱体には、温度が互いに異なる複数の領域が存在し、前記発熱体の高温側の領域に前記伝熱シートの金属含有率が多い方の領域を対応させていることを特徴とする請求項3記載の熱伝導構造体。
- 前記発熱体には、温度が互いに異なる複数の領域が存在し、前記発熱体の低温側の領域に前記伝熱シートの樹脂含有率が多い方の領域を対応させていることを特徴とする請求項3記載の熱伝導構造体。
- 発熱体と、放熱体と、該発熱体及び放熱体の間に接合され、前記発熱体からの熱を前記放熱体へ伝導する伝熱シートとを備える熱伝導構造体を製造する方法において、
前記発熱体及び放熱体の接合面に絶縁性樹脂をパターン形成する工程と、前記絶縁性樹脂がパターン形成された前記発熱体及び/または放熱体の接合面に、金属と樹脂との混合材を塗布する工程と、前記発熱体及び放熱体にパターン形成された前記絶縁性樹脂を位置合せして、前記発熱体、混合材及び放熱体を加熱接合する工程とを有することを特徴とする熱伝導構造体の製造方法。
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JP2004239960A JP4086822B2 (ja) | 2004-08-19 | 2004-08-19 | 熱伝導構造体及び熱伝導構造体の製造方法 |
US11/012,147 US7610678B2 (en) | 2004-08-19 | 2004-12-16 | Heat transfer sheet, heat transfer structural body and manufacturing method of the heat transfer structural body |
KR1020040110950A KR100641373B1 (ko) | 2004-08-19 | 2004-12-23 | 전열 시트, 열전도 구조체 및 열전도 구조체의 제조 방법 |
CNB2004100114761A CN100385651C (zh) | 2004-08-19 | 2004-12-31 | 传热板、传热构造体及其制造方法 |
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Also Published As
Publication number | Publication date |
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KR100641373B1 (ko) | 2006-11-01 |
CN1738031A (zh) | 2006-02-22 |
US7610678B2 (en) | 2009-11-03 |
JP4086822B2 (ja) | 2008-05-14 |
CN100385651C (zh) | 2008-04-30 |
KR20060017463A (ko) | 2006-02-23 |
US20060037741A1 (en) | 2006-02-23 |
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