ELECTROMAGNETIC ABSORBER COMPOSITION, THREE-DIMENSIONALLY MOLDED ARTICLE FORMED FROM ELECTROMAGNETIC ABSORBER, ELECTRONIC COMPONENT AND ELECTRONIC DEVICE USING SAME, AND METHODS FOR PRODUCING ELECTRONIC COMPONENT AND ELECTRONIC DEVICE

摘要

This three-dimensionally molded article formed from an electromagnetic absorber is molded using an electromagnetic absorber composition containing a binder resin and iron oxide which is an electromagnetic wave absorbing material which magnetically resonates in millimeter-wave and higher frequency bands. The three-dimensionally molded article is molded into a thin-wall structure capable of covering an electronic member and satisfies the relational expression d × V^1/3 0.4, where d (mm) represents the wall thickness of the three-dimensionally molded article, and V (%) represents the volume content percentage of the electromagnetic wave absorbing material contained in the three-dimensionally molded article. Moreover, the electromagnetic wave transmission attenuation in the millimeter-wave and higher frequency bands is 10dB or greater.