Patent ID: 7330354
Filing Date: 2008-02-12
Classification: G06F,H04M,H05K

Abstract:
1. A mobile terminal device comprising: a circuit board, heat-generating components disposed on one face of 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, and at least one heat conduction suppressing layer having a heat conductivity lower than that of the main constituent material of the circuit board, said heat conduction suppressing layer being provided inside the circuit board and between the first heat conduction layer and the operation member, wherein the heat generated in the heat-generating components is dispersed to the whole face of the circuit board via the heat conduction layer.