JP6013709B2 - 熱硬化型ダイボンドフィルム、ダイシング・ダイボンドフィルム、及び、半導体装置の製造方法 - Google Patents
熱硬化型ダイボンドフィルム、ダイシング・ダイボンドフィルム、及び、半導体装置の製造方法 Download PDFInfo
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- JP6013709B2 JP6013709B2 JP2011124402A JP2011124402A JP6013709B2 JP 6013709 B2 JP6013709 B2 JP 6013709B2 JP 2011124402 A JP2011124402 A JP 2011124402A JP 2011124402 A JP2011124402 A JP 2011124402A JP 6013709 B2 JP6013709 B2 JP 6013709B2
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Description
即ち、本発明の熱硬化型ダイボンドフィルムは、熱硬化型ダイボンドフィルムの厚さY(μm)と充填材の最大粒径X(μm)との関係をX/Y≦1とするものである。これにより、熱硬化型ダイボンドフィルムを介して半導体チップを被着体上にダイボンディングする際に、フィルム中に含まれる充填材が半導体チップに局所的な応力を加えるのを低減することができる。その結果、半導体チップの破損を低減することができ、スループットを向上させて半導体装置の製造が図れるという効果を奏する。
本発明の熱硬化型ダイボンドフィルム(以下、「ダイボンドフィルム」と言う)について、ダイシングフィルム(粘着フィルム)と一体的に積層されたダイシング・ダイボンドフィルムを例にして以下に説明する。図1は、本実施の形態に係るダイシング・ダイボンドフィルムを示す断面模式図である。図2は、本実施の形態に係る他のダイシング・ダイボンドフィルムを示す断面模式図である。
本発明のダイシング・ダイボンドフィルム10、12は、ダイボンドフィルム3、3’上に任意に設けられたセパレータを適宜に剥離して、次の様に使用される。以下では、図を参照しながらダイシング・ダイボンドフィルム10を用いた場合を例にして説明する。
前記基板等上に半導体素子を3次元実装する場合、半導体素子の回路が形成される面側には、バッファーコート膜が形成されている。当該バッファーコート膜としては、例えば窒化珪素膜やポリイミド樹脂等の耐熱樹脂からなるものが挙げられる。
トリスヒドロキシフェニルメタン型エポキシ樹脂(日本化薬(株)製、商品名;EPPN−501HY)12重量部、キシリレンノボラック型フェノール樹脂(明和化成(株)製)、商品名;MEH7800H)4重量部、アクリル共重合体(ノガワケミカル(株)製、商品名;レビタルAR31)36重量部、充填材として球状シリカ(アドマテックス(株)製、商品名;SO−E2、最大粒径1.4μm、平均粒径0.5μm)40重量部を、メチルエチルケトンに溶解させ、濃度15.0重量%の接着剤組成物を調製した。
トリスヒドロキシフェニルメタン型エポキシ樹脂(日本化薬(株)製、商品名;EPPN−501HY)4重量部、キシリレンノボラック型フェノール樹脂(明和化成(株)製)、商品名;MEH7800H)4重量部、アクリル共重合体(ノガワケミカル(株)製、商品名;レビタルAR31)12重量部、充填材として球状シリカ(アドマテックス(株)製、商品名;SO−E2、最大粒径1.4μm、平均粒径0.5μm)80重量部を、メチルエチルケトンに溶解させ、濃度15.0重量%の接着剤組成物を調製した。
トリスヒドロキシフェニルメタン型エポキシ樹脂(日本化薬(株)製、商品名;EPPN−501HY)12重量部、キシリレンノボラック型フェノール樹脂(明和化成(株)製)、商品名;MEH7800H)12重量部、アクリル共重合体(ノガワケミカル(株)製、商品名;レビタルAR31)36重量部、充填材として球状シリカ(アドマテックス(株)製、商品名;SO−E2、最大粒径1.4μm、平均粒径0.5μm)40重量部を、メチルエチルケトンに溶解させ、濃度15.0重量%の接着剤組成物を調製した。
トリスヒドロキシフェニルメタン型エポキシ樹脂(日本化薬(株)製、商品名;EPPN−501HY)4重量部、キシリレンノボラック型フェノール樹脂(明和化成(株)製)、商品名;MEH7800H)4重量部、アクリル共重合体(ノガワケミカル(株)製、商品名;レビタルAR31)12重量部、充填材として球状シリカ(アドマテックス(株)製、商品名;SO−E2、最大粒径1.4μm、平均粒径0.5μm)80重量部を、メチルエチルケトンに溶解させ、濃度15.0重量%の接着剤組成物を調製した。
トリスヒドロキシフェニルメタン型エポキシ樹脂(日本化薬(株)製、商品名;EPPN−501HY)12重量部、キシリレンノボラック型フェノール樹脂(明和化成(株)製)、商品名;MEH7800H)12重量部、アクリル共重合体(ノガワケミカル(株)製、商品名;レビタルAR31)36重量部、充填材として球状シリカ(アドマテックス(株)製、商品名;SO−E3、最大粒径5.0μm、平均粒径0.9μm)40重量部を、メチルエチルケトンに溶解させ、濃度15.0重量%の接着剤組成物を調製した。
トリスヒドロキシフェニルメタン型エポキシ樹脂(日本化薬(株)製、商品名;EPPN−501HY)4重量部、キシリレンノボラック型フェノール樹脂(明和化成(株)製)、商品名;MEH7800H)4重量部、アクリル共重合体(ノガワケミカル(株)製、商品名;レビタルAR31)12重量部、充填材として球状シリカ(アドマテックス(株)製、商品名;SO−E3、最大粒径5.0μm、平均粒径0.9μm)80重量部を、メチルエチルケトンに溶解させ、濃度15.0重量%の接着剤組成物を調製した。
トリスヒドロキシフェニルメタン型エポキシ樹脂(日本化薬(株)製、商品名;EPPN−501HY)12重量部、キシリレンノボラック型フェノール樹脂(明和化成(株)製)、商品名;MEH7800H)12重量部、アクリル共重合体(ノガワケミカル(株)製、商品名;レビタルAR31)36重量部、充填材として球状シリカ(アドマテックス(株)製、商品名;SO−E3、最大粒径5.0μm、平均粒径0.9μm)40重量部を、メチルエチルケトンに溶解させ、濃度15.0重量%の接着剤組成物を調製した。
トリスヒドロキシフェニルメタン型エポキシ樹脂(日本化薬(株)製、商品名;EPPN−501HY)4重量部、キシリレンノボラック型フェノール樹脂(明和化成(株)製)、商品名;MEH7800H)4重量部、アクリル共重合体(ノガワケミカル(株)製、商品名;レビタルAR31)12重量部、充填材として球状シリカ(アドマテックス(株)製、商品名;SO−E3、最大粒径5.0μm、平均粒径0.9μm)80重量部を、メチルエチルケトンに溶解させ、濃度15.0重量%の接着剤組成物を調製した。
トリスヒドロキシフェニルメタン型エポキシ樹脂(日本化薬(株)製、商品名;EPPN−501HY)12重量部、キシリレンノボラック型フェノール樹脂(明和化成(株)製)、商品名;MEH7800H)12重量部、アクリル共重合体(ノガワケミカル(株)製、商品名;レビタルAR31)36重量部、充填材として球状シリカ(アドマテックス(株)製、商品名;SO−E5、最大粒径8.0μm、平均粒径1.3μm)40重量部を、メチルエチルケトンに溶解させ、濃度15.0重量%の接着剤組成物を調製した。
トリスヒドロキシフェニルメタン型エポキシ樹脂(日本化薬(株)製、商品名;EPPN−501HY)4重量部、キシリレンノボラック型フェノール樹脂(明和化成(株)製)、商品名;MEH7800H)4重量部、アクリル共重合体(ノガワケミカル(株)製、商品名;レビタルAR31)12重量部、充填材として球状シリカ(アドマテックス(株)製、商品名;SO−E5、最大粒径8.0μm、平均粒径1.3μm)80重量部を、メチルエチルケトンに溶解させ、濃度15.0重量%の接着剤組成物を調製した。
トリスヒドロキシフェニルメタン型エポキシ樹脂(日本化薬(株)製、商品名;EPPN−501HY)12重量部、キシリレンノボラック型フェノール樹脂(明和化成(株)製)、商品名;MEH7800H)12重量部、アクリル共重合体(ノガワケミカル(株)製、商品名;レビタルAR31)36重量部、充填材として球状シリカ(アドマテックス(株)製、商品名;SO−E5、最大粒径8.0μm、平均粒径1.3μm)40重量部を、メチルエチルケトンに溶解させ、濃度15.0重量%の接着剤組成物を調製した。
トリスヒドロキシフェニルメタン型エポキシ樹脂(日本化薬(株)製、商品名;EPPN−501HY)4重量部、キシリレンノボラック型フェノール樹脂(明和化成(株)製)、商品名;MEH7800H)4重量部、アクリル共重合体(ノガワケミカル(株)製、商品名;レビタルAR31)12重量部、充填材として球状シリカ(アドマテックス(株)製、商品名;SO−E5、最大粒径8.0μm、平均粒径1.3μm)80重量部を、メチルエチルケトンに溶解させ、濃度15.0重量%の接着剤組成物を調製した。
充填材の平均粒径、及び、最大粒径の測定は、光度式の粒度分布計(HORIBA製、装置名;LA−910)を用いて行った。結果を下記表1及び表2に示す。なお、最大粒径は、横軸を粒径、縦軸を相対粒子量とした2次元のグラフにおいて、ベースラインと当該曲線とで囲まれた面積を100%としたとき、粒径が小さい側から当該面積を積算した累計面積が100%となる粒径を最大粒径とした。
各実施例及び比較例で作製した熱硬化型ダイボンドフィルムにおける粗さ曲線の最大断面高さRtは、JIS B0601に準拠して、非接触表面粗さ測定装置(日本ビーコ社製、WYKO)を用い、表面の傾き補正を行った後に測定した。結果を下記表1及び表2に示す。
先ず、ダイシングフィルムを作製した。即ち、厚さが100μmのポリオレフィンからなる基材上に、アクリル系粘着剤組成物の溶液を塗布、乾燥して、厚さが10μmの粘着剤層を形成してダイシングフィルムを作製した。
[貼り合わせ条件]
貼り付け装置:日東精機製、MA−3000III
貼り付け速度:10mm/sec
貼り付け圧力:0.25MPa
貼り付け時のステージ温度:40℃
[ダイシング条件]
ダイシング装置:ディスコ社製、DFD−6361
ダイシングリング:2−8−1(ディスコ社製)
ダイシング速度:80mm/sec
ダイシングブレード:ディスコ社製2050HEDD
ダイシングブレード回転数:40,000rpm
ブレード高さ:0.170mm
カット方式:Aモード/ステップカット
[ピックアップ条件]
ニードル:全長10mm、直径0.7mm、鋭角度15deg、先端R350μm
ニードル本数:5本
ニードル突き上げ量:350μm
ニードル突き上げ速度:5mm/sec
コレット保持時間:200msec
エキスパンド:3mm
[ダイボンド条件]
ダイボンド温度:120℃
ボンディング圧力:0.1MPa
ボンディング時間:1sec
アフターキュア:150℃で1時間
下記表1及び表2から分かる通り、本発明の各実施例に係る熱硬化型ダイボンドフィルムの様に、その厚さY(μm)と充填材の最大粒径X(μm)の比率X/Y(−)が1以下であると、半導体チップを破損させることなくリードフレーム上にダイボンディングをすることができた。その一方、比率X/Y(−)が1を超える各比較例の熱硬化型ダイボンドフィルムであると、ダイボンディングの際に半導体チップに破損が確認された。
2 粘着剤層
3 ダイボンドフィルム(熱硬化型ダイボンドフィルム)
4 半導体ウェハ
5 半導体チップ
6 被着体
7 ボンディングワイヤー
8 封止樹脂
9 スペーサ
10、11 ダイシング・ダイボンドフィルム
13 ダイボンドフィルム(熱硬化型ダイボンドフィルム)
15 半導体チップ
21 ダイボンドフィルム(熱硬化型ダイボンドフィルム)
Claims (6)
- 接着剤組成物及び微粒子からなる充填材を含む熱硬化型ダイボンドフィルムであって、
前記熱硬化型ダイボンドフィルムの厚さをY(μm)とし、前記充填材の最大粒径をX(μm)としたときの比率X/Y(−)が1以下であり、
前記熱硬化型ダイボンドフィルムにおける粗さ曲線の最大断面高さRtが0.1〜2.3μmの範囲内であり、
前記X(μm)が0.05μm以上5μm以下の範囲内である熱硬化型ダイボンドフィルム。ただし、Xが、1μm以下の場合を除く。 - 前記Y(μm)が1μm以上5μm以下の範囲内である請求項1に記載の熱硬化型ダイボンドフィルム。
- 前記充填材の含有量が、前記接着剤組成物100重量部に対し1重量部以上80重量部以下の範囲内である請求項1又は2に記載の熱硬化型ダイボンドフィルム。
- 前記充填材の含有量が、前記接着剤組成物100体積部に対し1体積部以上40体積部以下の範囲内である請求項1〜3の何れか1項に記載の熱硬化型ダイボンドフィルム。
- 請求項1〜4の何れか1項に記載の熱硬化型ダイボンドフィルムが、ダイシングフィルム上に積層されていることを特徴とするダイシング・ダイボンドフィルム。
- 請求項5に記載のダイシング・ダイボンドフィルムを用いた半導体装置の製造方法であって、
前記熱硬化型ダイボンドフィルムを貼り合わせ面として、半導体ウェハの裏面に前記ダイシング・ダイボンドフィルムを貼り合わせる貼り合わせ工程と、
前記半導体ウェハを前記熱硬化型ダイボンドフィルムと共にダイシングして半導体チップを形成するダイシング工程と、
前記半導体チップを、前記ダイシング・ダイボンドフィルムから前記熱硬化型ダイボンドフィルムと共にピックアップするピックアップ工程と、
前記熱硬化型ダイボンドフィルムを介して、温度100℃以上180℃以下、ボンディング圧力0.05MPa以上0.5MPa以下、ボンディング時間0.1秒以上5秒以下の範囲内の条件下で、前記半導体チップを被着体上にダイボンディングするダイボンド工程とを有する半導体装置の製造方法。
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