JP2013008861A - 半導体装置、その製造方法及び製造装置 - Google Patents
半導体装置、その製造方法及び製造装置 Download PDFInfo
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Abstract
【解決手段】実施形態の半導体装置の製造方法は、第1の半導体チップ2上に接着剤層5を介して第2の半導体チップ3を積層し接着する工程(a)と、次式(1)のyの値が70以下となるように、接着剤層の弾性率、そのヒケ量、保護膜の厚さ、その弾性率[MPa]の少なくとも1つを調整する工程(b)と、工程(b)の後に、第1及び第2の半導体チップをフィラー10a入りモールド樹脂10で封止する工程(c)とを含む。y=74.7−82.7a1+273.2a2−9882a3+65.8a4…(1)(a1は接着剤層の弾性率[MPa]の対数、a2は接着剤層のヒケ量[mm]、a3は第1の半導体チップ表面の保護膜の厚さ[mm]、a4は第1の半導体チップ表面の保護膜の弾性率[MPa]の対数を示す。)
【選択図】図1
Description
y=74.7−82.7a1+273.2a2−9882a3+65.8a4
…(1)
(ここで、
a1は、前記接着剤層の弾性率[MPa]の対数、
a2は、前記接着剤層のヒケ量[mm]、
a3は、前記第1の半導体チップ表面の保護膜の厚さ[mm]、
a4は、前記第1の半導体チップ表面の保護膜の弾性率[MPa]の対数
を示す。)
y=74.7−82.7a1+273.2a2−9882a3+65.8a4
…(1)
(ここで、
a1は、前記接着剤層の弾性率[MPa]の対数、
a2は、前記接着剤層のヒケ量[mm]、
a3は、前記第1の半導体チップ表面の保護膜の厚さ[mm]、
a4は、前記第1の半導体チップ表面の保護膜の弾性率[MPa]の対数
を示す。)
y=74.7−82.7a1+273.2a2−9882a3+65.8a4
…(1)
(ここで、
a1は、接着剤層5の弾性率[MPa]の対数、
a2は、接着剤層5のヒケ量[mm]、
a3は、第1の半導体チップ表面2の保護膜の厚さ[mm]、
a4は、第1の半導体チップ2表面の保護膜の弾性率[MPa]の対数
を示す。)
(i)接着剤層弾性率:10,50,300[MPa]
(ii)接着剤層ヒケ量:0.02,0.1,0.2[mm]
(v)保護膜の厚さ:0.005,0.0065,0.01[mm]
(vi)保護膜の弾性率:500,1000,3000[MPa]
結果は表3に示した通りで、分散分析の結果、各因子について先の実験結果と同様の効果を示した。
y=f(a1,a2,a3,a4)
で表わすことができる。ここで、a1は、接着剤層の弾性率[MPa]の対数、a2は、接着剤層のヒケ量[mm]、a3は、1番目の半導体チップ表面の保護膜の厚さ[mm]、a4は、1段目の半導体チップ表面の保護膜の弾性率[MPa]の対数である。
y=74.7−82.7a1+273.2a2−9882a3+65.8a4
…(1)
このR2は89.4%である。また、a1、a2、a3及びa4は、それぞれ1.00≦a1≦2.48、0.02≦a1≦0.2、0.005≦a1≦0.01、及び2.70≦a1≦3.48である。
解析の結果、フィラー直下の半導体チップ表面にかかる応力は70MPaであった。
すなわち、第1の半導体チップ上に接着剤層を介して第2の半導体チップを積層し、これらの半導体チップをフィラー入りモールド樹脂で封止した構造のチップ積層モールド封止型半導体装置において、フィラー直下の半導体チップ表面にかかる応力y[MPa]は、接着剤層の弾性率[MPa]の対数a1、接着剤層5のヒケ量[mm]a2、第1の半導体チップ表面2の保護膜の厚さ[mm]a3、及び第1の半導体チップ2表面の保護膜の弾性率[MPa]の対数a4の関数として表すことができ(但し、a1、a2、a3及びa4は、それぞれ、1.00≦a1≦2.48、0.02≦a1≦0.2、0.005≦a1≦0.01、及び2.70≦a1≦3.48である。)、かつ、y≦70であればフィラーアタックが発生することがない。
1段目の半導体チップとして、表面に厚さ0.005mm、弾性率3000(=103.48)MPaのポリイミド樹脂からなる保護膜が形成された半導体チップを用いて、図1に示したような、2段積層型の半導体装置を製造した。
a1=2.48(接着剤の弾性率300MPa)
a2=0.05(接着剤のヒケ量0.05mm)
a1=0.005(保護膜の厚さ0.005mm)
a2=3.48(保護膜の弾性率3000MPa)
y=62.9(フィラー直下の半導体チップの表面応力)
1段目の半導体ウエハとして、表面に厚さ0.01mm、弾性率3000(=103.48)MPaのポリイミド樹脂からなる保護膜が形成された半導体チップを用いて、図1に示したような、2段積層型の半導体装置を製造した。
a1=2.00(接着剤の弾性率100MPa)
a2=0.1(接着剤のヒケ量0.1mm)
a1=0.01(保護膜の厚さ0.01mm)
a2=3.48(保護膜の弾性率3000MPa)
y=66.6(フィラー直下の半導体チップの表面応力)
Claims (5)
- 第1の半導体チップ上に接着剤層を介して第2の半導体チップを積層し接着する工程(a)と、
次式(1)で求められるyの値が70以下となるように、前記接着剤層の弾性率[MPa]、前記接着剤層のヒケ量[mm]、前記第1の半導体チップ表面の保護膜の厚さ[mm]、及び前記第1の半導体チップ表面の保護膜の弾性率[MPa]の少なくとも1つを調整する工程(b)と、
前記工程(b)の後に、前記第1及び第2の半導体チップをフィラー入りモールド樹脂で封止する工程(c)と
を含むことを特徴とする半導体装置の製造方法。
y=74.7−82.7a1+273.2a2−9882a3+65.8a4
…(1)
(ここで、
a1は、前記接着剤層の弾性率[MPa]の対数、
a2は、前記接着剤層のヒケ量[mm]、
a3は、前記第1の半導体チップ表面の保護膜の厚さ[mm]、
a4は、前記第1の半導体チップ表面の保護膜の弾性率[MPa]の対数
を示す。) - 前記a1、a2、a3及びa4が、それぞれ、1.00≦a1≦2.48、0.02≦a2≦0.2、0.005≦a3≦0.01、及び2.70≦a4≦3.48であることを特徴とする請求項1記載の半導体装置の製造方法。
- 前記工程(b)は、前記接着剤層の弾性率[MPa]を調整することを含む請求項1または2記載の半導体装置の製造方法。
- 第1の半導体チップと、前記第1の半導体チップ上に接着剤層を介して積層された第2の半導体チップと、前記第1及び第2の半導体チップを封止するフィラー入りモールド樹脂とを備えた半導体装置の製造装置であって、
次式(1)で求められるyの値が70以下となるように、前記接着剤層の弾性率[MPa]、前記接着剤層のヒケ量[mm]、前記第1の半導体チップ表面の保護膜の厚さ[mm]、及び前記第1の半導体チップ表面の保護膜の弾性率[MPa]の少なくとも1つを調整する調整部を備えることを特徴とする半導体装置の製造装置。
y=74.7−82.7a1+273.2a2−9882a3+65.8a4
…(1)
(ここで、
a1は、前記接着剤層の弾性率[MPa]の対数、
a2は、前記接着剤層のヒケ量[mm]、
a3は、前記第1の半導体チップ表面の保護膜の厚さ[mm]、
a4は、前記第1の半導体チップ表面の保護膜の弾性率[MPa]の対数
を示す。) - 第1の半導体チップと、前記第1の半導体チップ上に接着剤層を介して積層された第2の半導体チップと、前記第1及び第2の半導体チップを封止するフィラー入りモールド樹脂とを備える半導体装置であって、
次式(1)で求められるyの値が70以下であることを特徴とする半導体装置。
y=74.7−82.7a1+273.2a2−9882a3+65.8a4
…(1)
(ここで、
a1は、前記接着剤層の弾性率[MPa]の対数、
a2は、前記接着剤層のヒケ量[mm]、
a3は、前記第1の半導体チップ表面の保護膜の厚さ[mm]、
a4は、前記第1の半導体チップ表面の保護膜の弾性率[MPa]の対数
を示す。)
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JP2001154365A (ja) * | 1999-11-30 | 2001-06-08 | Hitachi Chemical Dupont Microsystems Ltd | 感光性樹脂組成物、パターンの製造法及び電子部品 |
WO2006101199A1 (ja) * | 2005-03-24 | 2006-09-28 | Sumitomo Bakelite Company, Ltd. | エリア実装型半導体装置並びにそれに用いるダイボンド用樹脂組成物、及び封止用樹脂組成物 |
JP2007214306A (ja) * | 2006-02-09 | 2007-08-23 | Denso Corp | 半導体装置 |
JP2007250886A (ja) * | 2006-03-16 | 2007-09-27 | Toshiba Corp | 半導体装置の製造方法 |
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