Thermal conductive electromagnetic wave absorbing sheet

A thermal conductive electromagnetic wave absorbing sheet comprising:

• a polymer including acrylate ester as a monomer;
• a metal magnetic oxide;
• and
• a flame retardant filler subjected to a surface treatment, wherein
• the metal magnetic oxide includes a small-diameter metal magnetic oxide with an average particle diameter of 1 to 10 μm and a large-diameter metal magnetic oxide with an average particle diameter of 50 to 100 μm,
• a mixing ratio between the small-diameter metal magnetic oxide and the large-diameter metal magnetic oxide is in a range of 9:13 to 15:7 in volume ratio,
• the small-diameter metal magnetic oxide and the large-diameter metal magnetic oxide are contained by 55 to 60 vol % in total in the entire thermal conductive electromagnetic wave absorbing sheet,
• the flame retardant filler subjected to the surface treatment is contained by 8 to 10 vol % in the entire thermal conductive electromagnetic wave absorbing sheet, and
• the flame retardant filler includes magnesium hydroxide having an average particle diameter of 0.5 to 2 μm and subjected to a higher fatty acid process and aluminum hydroxide having an average particle diameter of 1 to 10 μm and subjected to a titanating process.