| 摘要 |
A housing 10 provided in a portable terminal device according to the present invention includes a plurality of stacked carbon fiber layers 21 to 24. Further, the direction of carbon fibers of the carbon fiber layer 21 disposed on the outermost side of the housing 10 among the plurality of carbon fiber layers 21 to 24 is conformed to the longitudinal direction d1 of the housing. The carbon composite material has such properties that the thermal conductivity is high and the strength is large along the direction of the carbon fibers. Therefore, with this configuration, heat can be preferentially diffused in the longitudinal direction d1 of the housing 10 and the strength in the longitudinal direction of the housing 10 can be improved. |
