JP2005119929A - 球状無機質粉末および液状封止材 - Google Patents
球状無機質粉末および液状封止材 Download PDFInfo
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Landscapes
- Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
- Silicon Compounds (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
【解決手段】少なくとも0.07〜0.3μmおよび0.3〜1.5μmの粒度域に極大径を示す多峰性の頻度粒度分布を有し、0.07〜0.3μmの領域における極大径の頻度値αと0.3〜1.5μmの領域における極大径の頻度値βとの比(β/α)が0.5〜10であり、かつ最大粒径が5μm以下である球状無機質粉末。球状の非晶質シリカ粉末からなり、特定粒度域の少なくとも2領域に極大径を示す多峰性の頻度粒度分布を有し、それらの極大径の頻度値には特定関係を有し、最大粒径が5μm以下であり、かつ0.01μm未満の粒子を実質的に含有しないことを特徴とする球状無機質粉末。上記球状無機質粉末を樹脂に含有させてなる液状封止材。
【選択図】 なし
Description
金属シリコン粉末をイオン交換水に分散させ、濃度60質量%のスラリーを調整した。このスラリーをLPGと酸素との燃焼により形成される高温火炎中に供給し、酸化処理を行って、球状シリカ粉末を得た。火炎形成条件、原料粒度、原料供給量、分級条件などを調整して表1および表2に示す15種の粉体A〜Pを製造した。具体的には、粒度分布の調整は酸化処理後の粉体の多段篩分け操作や分級・混合操作により行った。なお、これらの球状シリカ粉末の非晶質率はいずれも99.9%以上、平均球形度は0.95以上であった。粉体A〜Pの粒度分布を測定し、0.07〜0.3μmの領域および0.3〜1.5μmの領域における極大径をそれぞれP1、P2として示した。また、0.07〜0.3μmの領域における極大径の頻度値αと0.3〜1.5μmの領域における極大径の頻度値βとの比を(β/α)として示した。
E型粘度計(トキメック社製商品名「TVE−30H」にて、3°R14のコーンローターを使用し、30℃においてローター回転数2.5rpmで測定した。
10μm、30μmのギャップを形成した二枚重ねの平滑なガラス板をホットプレート上に載せ、100℃に加熱し、上記ガラス板の間隙に液状封止材を浸透させた。5分間で浸透した距離を計測し、浸透性を評価した。
Claims (3)
- 少なくとも0.07〜0.3μmおよび0.3〜1.5μmの粒度域に極大径を示す多峰性の頻度粒度分布を有し、0.07〜0.3μmの領域における極大径の頻度値αと0.3〜1.5μmの領域における極大径の頻度値βとの比(β/α)が0.5〜10であり、かつ最大粒径が5μm以下であることを特徴とする球状無機質粉末。
- 球状の非晶質シリカ粉末からなり、少なくとも0.1〜0.2μmおよび0.5〜1.0μmの粒度域に極大径を示す多峰性の頻度粒度分布を有し、0.1〜0.2μmの領域における極大径の頻度値αと0.5〜1.0μmの領域における極大径の頻度値βとの比(β/α)が1〜10であり、最大粒径が5μm以下であり、かつ0.01μm未満の粒子を実質的に含有しないことを特徴とする球状無機質粉末。
- 請求項1又は2記載の球状無機質粉末を樹脂に含有させてなることを特徴とする液状封止材。
Priority Applications (1)
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