Abstract: To provide an electronic device which can prevent that a heat sink constituting a source of the unnecessary radiation of electromagnetic waves with a simple structure. The electronic device which contains the heat sink in the case is constituted. A heat sink includes: a fin assembly having a wave-guide structure provided with mesh-like openings as a whole and with a plurality of arranged fins and wall portions extending from each of the openings; a heat receiving plate for receiving heat from an electronic device which is a cooled object; and heat pipes. Since each of the openings of the fin assembly has the wave-guide structure, heat generated by the electronic device is dissipated to an exterior through the openings of the fin assembly and an opening section of a case. Leakage of electromagnetic waves to the exterior is prevented by operation of the wave-guide structure.

Abstract: Provided is a structure in which a shield 308 and a heat sink 307 integrated with a radiation fin 306 are sandwiched by a main substrate 381a and a power source substrate 381b. A hood 142d covers the radiation fin 306 so as to collect air for cooling. Major parts of the main substrate 381a are in contact with the heat sink 307 via heat conduction members having different heat conductivity so that an even thermal distribution is provided. Thus, parts of electronic equipment can be efficiently disposed in a limited space. Moreover, the parts of the electronic equipment can be effectively cooled.

Abstract: Provided is a structure in which a shield 308 and a heat sink 307 integrated with a radiation fin 306 are sandwiched by a main substrate 381a and a power source substrate 381b. A hood 142d covers the radiation fin 306 so as to collect air for cooling. Major parts of the main substrate 381a are in contact with the heat sink 307 via heat conduction members having different heat conductivity so that an even thermal distribution is provided. Thus, parts of electronic equipment can be efficiently disposed in a limited space. Moreover, the parts of the electronic equipment can be effectively cooled.