| 摘要 |
PROBLEM TO BE SOLVED: To provide a silica powder being amenable to powder operations such as transportation and classification, being capable of being mixed with a resin without being agglomerated, of being uniformly dispersed, and of preventing an increase in viscosity, to provide a method for producing the same, and to provide a resin composition excellent in hygroscopic resistance, soldering-crack resistance and low in expansibility. SOLUTION: The slightly basic silica is one prepared by treating the surface of a silica powder with a basic substance or a basic mixture, wherein the silica powder or the slightly basic silica powder is freed from coarse particles with particle diameters of a specified or larger value. COPYRIGHT: (C)2005,JPO&NCIPI
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