Patent ID: 7616446
Filing Date: 2009-11-10
Classification: G06F,H04M,H05K

Abstract:
1. A mobile terminal device comprising: a circuit board, heat-generating components mounted on the circuit board, at least one first heat conduction layer provided inside the circuit board, in which a member having a heat conductivity higher than that of the main constituent material of the circuit board is arranged in the direction of the face of the circuit board, an operation member on the face other than the face of the circuit board on which the heat-generating components are disposed, an upper housing and lower housing having an upper and a lower protruding portion, respectively, in contact with the circuit board, and another circuit board fixed to the circuit board, where a mobile terminal display is disposed in said another circuit board, wherein the heat generated in the heat-generating components is dispersed to the whole face of the circuit board, the upper and lower housing via the heat conduction layer and the upper and lower protruding portions and the circuit board is arranged inside said mobile terminal device, wherein at least one second heat conduction layer in which a member having a heat conductivity higher than that of the main constituent material of the another circuit board is arranged in the direction of the face of the another circuit board is provided inside or on the surface of the another circuit board, the first heat conduction layer of the circuit board is thermally connected to the second heat conduction layer of the another circuit board by a flexible connection member, and the heat generated in the heat-generating components mounted on the circuit board is transferred to the another circuit board via the flexible connection member.