ELECTROMAGNETIC WAVE SUPPRESSION SHEET AND ELECTROMAGNETIC WAVE SUPPRESSION HEAT CONDUCTION SHEET

摘要

PROBLEM TO BE SOLVED: To provide an electromagnetic suppression heat conduction sheet that can cope with noise and heat to a product generating intense heat and high-frequency noise in a CPU or the like.;SOLUTION: The soft electromagnetic wave suppression sheet 3, and a soft heat radiation sheet 2 are provided. The soft electromagnetic suppression sheet 3 is formed by mixing a silicone-family resin with soft magnetic powder and heat conduction filler. The soft heat radiation sheet 2 is formed by mixing the silicone-family resin with the heat conduction filler. In the electromagnetic suppression sheet, a through hole 3a is formed at the center section, and the soft heat radiation sheet is supported on the electromagnetic suppression sheet while the through hole is being blocked. The through hole is positioned at a chip section (heat generation source) 1a of the CPU 1, thus efficiently transferring heat in the CPU to a heat sink 4 via the soft heat radiation sheet for radiation. The high-frequency noise generated at the peripheral section 1b in the CPU is cut by the electromagnetic suppression sheet.;COPYRIGHT: (C)2002,JPO