JP6218083B2 - 半導体封止用エポキシ樹脂組成物及び半導体装置の製造方法 - Google Patents
半導体封止用エポキシ樹脂組成物及び半導体装置の製造方法 Download PDFInfo
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- JP6218083B2 JP6218083B2 JP2014525816A JP2014525816A JP6218083B2 JP 6218083 B2 JP6218083 B2 JP 6218083B2 JP 2014525816 A JP2014525816 A JP 2014525816A JP 2014525816 A JP2014525816 A JP 2014525816A JP 6218083 B2 JP6218083 B2 JP 6218083B2
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Classifications
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- H01L2224/13001—Core members of the bump connector
- H01L2224/13099—Material
- H01L2224/131—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
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Description
本発明はまた、電極を有する基板の電極面に、液状の半導体封止用エポキシ樹脂組成物を供給する工程(1)、前記基板を加熱することにより、前記樹脂組成物を高粘度化する工程(2)、及び、バンプを形成した半導体チップを前記高粘度化した樹脂組成物に、加熱下、押付加圧しつつ、前記樹脂組成物を前記基板と前記半導体チップとの間隙に押し広げて充填する工程(3)を有することを特徴とするフリップチップ実装してなる半導体装置の製造方法でもある。
本発明の組成物は、Cuポストチップの樹脂先置き型実装において顕在化した課題を解決し、とくに、ボイド発生による欠陥を抑制しつつ、作業性の良好な樹脂先置き型フリップチップ実装を実現でき、Cuポストチップを用いた半導体装置の製造方法に特に好適に使用可能である。
表1及び表2に示す各成分及び配合量(重量部)でそれぞれ配合して室温で混合し、均一な液状組成物をそれぞれに調製した。
得られた各組成物を使用して、以下の項目について、下記の方法で測定し、評価した。結果を表1及び表2に示した。
基板上に各組成物を塗布量3mgとなるように25℃でディスペンスした。次に、基板をホットプレートで80℃、10分間加熱した後、当該基板とチップを圧接した。圧接条件は、押付加圧時の樹脂温度が160℃になるよう加熱下、押付速度0.3mm/秒、加圧5g/ポスト、3秒間で行った。この圧接したサンプルをピーク温度260℃、4秒間加熱し、半田溶融及び封止樹脂を硬化させて評価サンプルを作成した。超音波探索、平面研磨によりボイドの有無を観察し、評価した。使用パッケージ:MB50−010JY CR/WALTS社製。
評価
◎:封止樹脂中にボイドが見られない
○:封止樹脂中の一部にボイドが存在するが、バンプ間にまたがるボイドは存在しない
×:封止樹脂の全体にボイドが存在するか、またはバンプ間にまたがるボイドが存在する
(2)ディスペンス性
武蔵社製金属ニードル20Gを使用して25℃で封止樹脂を吐出し、評価した。
評価
◎:3秒以内に4mg吐出可能
○:3〜5秒以内に4mg吐出可能
×:4mg吐出するのに5秒超かかる
(3)接続性
超音波探索、断面観察によりハンダ形状を調べ、評価した。使用パッケージ:MB50−010JY/WALTS社製。
評価
○:基板側とチップのバンプ側のハンダが接続している
×:基板側とチップのバンプ側のハンダが接続していない、もしくはハンダ接合部の形状がくびれている
40℃における粘度を経時的にレオメーター(TAインスツルメント社製、AR−G2。以下同じ。)により測定し、評価した。
評価
◎:6時間後に粘度が1.5倍以下である
○:3時間後に粘度が1.5倍以下である
(5)粘度(25℃)
25℃において、HBT回転式粘度計により測定し、10rpmでの粘度を読み取った。
(6)粘度(80℃、10分経過後)
レオメーターにより、80℃に固定して10分後の粘度を読み取った。
(7)増粘開始温度
レオメーターにより、周波数1Hz、昇温速度10℃/minで測定したときに封止樹脂が粘度上昇したときの温度を読み取った。なお、120℃まで昇温しても粘度上昇が見られなかったものは「増粘なし」とした。
エポキシ樹脂:1,6−ビス(2,3−エポキシプロポキシ)ナフタレン
硬化剤:トリアルキルテトラヒドロキシ無水フタル酸
アクリルゴム粒子(1):ガンツ化成社製F301(商品名)平均粒径2μmのアクリル樹脂粒子
アクリルゴム粒子(2):三菱レイヨン社製JF003(商品名)平均粒径1μmのアクリル樹脂粒子
アクリルゴム粒子(3):三菱レイヨン社製JF001(商品名)平均粒径1μmのアクリル樹脂粒子
アクリルゴム粒子(4):ガンツ化成社製F320(商品名)平均粒径1μmのアクリル樹脂粒子
アクリルゴム粒子(5):三菱レイヨン社製メタブレンC−140A(商品名)アクリル樹脂粒子
シリカフィラー:平均粒径2.0μm(球状溶融シリカ)
シランカップリング剤:エポキシシラン
硬化促進剤:イミダゾール系硬化促進
Claims (16)
- エポキシ樹脂(A)、硬化剤(B)、硬化促進剤(C)及び前記(A)100重量部に対して15〜64重量部の、体積平均一次粒径0.2〜10μmの加熱型増粘樹脂粒子(D)を含有する、フリップチップ実装のための半導体封止用エポキシ樹脂組成物であって、さらに、樹脂組成物全体100重量部に対して、無機フィラーを30〜67重量部含有する前記組成物。
- 加熱型増粘樹脂粒子(D)は、アクリル樹脂粒子である請求項1記載の組成物。
- 加熱型増粘樹脂粒子(D)の含有量は、6〜50重量部である請求項1又は2に記載の組成物。
- 硬化剤(B)は、酸無水物である請求項1〜3のいずれかに記載の組成物。
- 硬化促進剤(C)をエポキシ樹脂(A)100重量部に対して3〜15重量部含有する請求項1〜4のいずれかに記載の組成物。
- 周波数1Hz、10℃/分の昇温速度における組成物の増粘開始温度が50〜120℃である請求項1〜5のいずれかに記載の組成物。
- 増粘開始温度が60〜100℃である請求項6記載の組成物。
- 15℃以上、50℃未満の範囲における組成物の粘度が1〜300Pa・sである請求項1〜7のいずれかに記載の組成物。
- フリップチップは、Cuポストの先端にソルダー層を形成したCuバンプを有するフリップチップである請求項1〜8のいずれかに記載の組成物。
- フリップチップ実装は、樹脂先置き型実装である請求項1〜9のいずれかに記載の組成物。
- 電極を有する基板の電極面に、液状の半導体封止用エポキシ樹脂組成物を供給する工程(1)、前記基板を加熱することにより、前記樹脂組成物を高粘度化する工程(2)、及び、バンプを形成した半導体チップを前記高粘度化した樹脂組成物に、加熱下、押付加圧しつつ、前記樹脂組成物を前記基板と前記半導体チップとの間隙に押し広げて充填する工程(3)を有することを特徴とするフリップチップ実装してなる半導体装置の製造方法であって、請求項1〜10のいずれかに記載の組成物を半導体封止用エポキシ樹脂組成物として使用する、製造方法。
- 前記工程(1)において、前記樹脂組成物の供給時の温度が15℃以上、50℃未満であり、粘度が1〜300Pa・sであり、前記工程(2)において、高粘度化したエポキシ樹脂組成物の粘度が10〜4000Pa・sの範囲である請求項11記載の製造方法。
- 前記工程(2)において、加熱条件は、加熱温度50〜120℃、加熱時間1〜30分である請求項11又は12記載の製造方法。
- 前記工程(3)において、押付加圧時の樹脂温度が150〜180℃となるよう加熱下、押付速度0.01〜5mm/sで押付加圧する請求項11〜13のいずれかに記載の製造方法。
- 更に、前記基板上の電極面に、バンプを電気的に接続する工程(4)、及び、前記樹脂組成物を加熱して硬化させる工程(5)を有する請求項11〜14のいずれかに記載の製造方法。
- バンプは、Cuポストの先端にソルダー層を形成したCuバンプであり、電極を有する基板は、電極面以外がソルダーレジストで被膜された基板であって、前記工程(4)において、ソルダー溶融温度以上に加熱する請求項15記載の製造方法。
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JP2007197572A (ja) * | 2006-01-26 | 2007-08-09 | Matsushita Electric Works Ltd | エポキシ樹脂組成物と電子部品の樹脂封止方法並びに樹脂封止電子部品 |
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