Patent ID: 8723054
Filing Date: 2014-05-13
Classification: B29C,H01F,H01Q,H05K,Y10T

Abstract:
1. A flexible electromagnetic noise suppression sheet comprising 3 to 10% by volume of a conductive carbon and 40 to 65% by volume of spinel ferrite particles having a cumulative 50% volume particle diameter of 1 to 10 μm, wherein the thickness of the electromagnetic noise suppression sheet is not more than 100 μm and wherein flexibility is determined when the electromagnetic noise suppression sheet is subjected to a bending test in which a test specimen cut into a width of 40 mm and a length of 50 mm was placed underneath a 3 mm-thick plastic plate having a chamfered edge for forming a 70° slant surface such that a short side (40 mm) of the test specimen was disposed in parallel with the slant surface-formed side of the plastic plate, and bent along the slant surface until the test specimen was brought into close contact with the edge and slant surface of the plastic plate and the test specimen maintains its flexible state and its electromagnetic noise suppression.