COMPOSITE MAGNETIC ELEMENT, ELECTROMAGNETIC WAVE ABSORBING SHEET, PRODUCTION METHOD FOR SHEET-FORM ARTICLE, PRODUCTION METHOD FOR ELECTROMAGNETIC WAVE ABSORBING SHEET

摘要

An electromagnetic wave absorbing sheet having a high-frequency and excellent transmittance, and a production method therefor. An electromagnetic wave absorbing sheet comprising insulation layers on the opposite surfaces of a magnetic layer. The magnetic layer is formed by plastically deforming and densely depositing many elements of magnetic powder. Each element of magnetic powder consists of a composite magnetic element formed of a soft magnetic metal phase consisting of flat soft magnetic metal powder and an insulation phase consisting of an insulation film formed on the surface of the soft magnetic metal phase. A conductor layer may be provided on one of the insulation layers located on the opposite sides of the magnetic layer, and the conductor layer may be covered with an insulation layer.