Abstract: A plate-type heat transport device and electronic instrument are provided. The plate-type heat transport device includes a heat absorbing plane absorbing heat because of the evaporation of a working fluid, a heat emission plane opposing the heat absorbing plane and emitting heat because of the condensation of the working fluid, and a flow path two-dimensionally arranged between the heat absorbing plane and the heat emission plane to align with the heat absorbing plane and the heat emission plane, the flow path allowing the working fluid to flow therethrough for changing the phase of the working fluid, and the flow path being capable of two-dimensionally diffusing the working fluid by generating a capillary force in the condensed working fluid.

Abstract: There are provided a magnetic core member for an antenna module capable of improving a communication distance without thickening the module, an antenna module, and a portable information terminal equipped with the antenna module. A magnetic core member 18 for an antenna module 10 of the present invention has a ring groove 18c as a recess portion formed on the surface on the side stacking an antenna coil 15 in an area facing a loop portion of the antenna coil 15. An eddy current generated in the magnetic core member 18 in a high frequency magnetic field is concentrated on the surface of the magnetic core member 18 on the side stacking the antenna coil 15 in the area facing the loop portion of the antenna coil 15. According to the present invention, a ring groove 18c is provided in the area to reduce an amount of eddy currents to be generated and improve the communication distance characteristics of the antenna module.

Abstract: A head slider for a flexible magnetic disk has a magnetic pole pad including a magnetic head buried in the pad and being disposed on a surface of the head slider opposed to the flexible magnetic disk, and the magnetic head performs the recording of a signal on the flexible magnetic disk or the reproducing of the signal from the flexible magnetic disk in a state that the pad contacts the flexible magnetic disk rotating at a relative speed of 0 m/s to 25.0 m/s to the magnetic head.