SPHERICAL SINTERED FERRITE PARTICLE, SEMICONDUCTOR SEALING RESIN COMPOSITION MAKING USE OF THE SAME AND SEMICONDUCTOR DEVICE OBTAINED THEREWITH

摘要

A semiconductor sealing resin composition that in hardened form, has effective electromagnetic wave shielding capability, exhibiting good moldability. There is provided a semiconductor sealing resin composition comprising spherical sintered ferrite particles with the characteristics of: (a) 5 ppm or less soluble ion content; (b) 10 to 50 µm average particle diameter; and (c) spinel structure as a crystal structure determined by X-ray diffractometry.