초록 ▼

In a heat sink, a portable electronic apparatus using this heat sink, and a method for forming this heat sink, an abutting member is arranged on an inside surface of a casing and the casing and the abutting member are covered with a heat spreader sheet. The heat spreader sheet is made to abut agains

In a heat sink, a portable electronic apparatus using this heat sink, and a method for forming this heat sink, an abutting member is arranged on an inside surface of a casing and the casing and the abutting member are covered with a heat spreader sheet. The heat spreader sheet is made to abut against an exothermic device by means of an abutting member. The heat generated in the exothermic device is transmitted to the inside wall surface of the casing via the heat spreader sheet, with a portion being transmitted via the abutting member. When an anisotropic thermal conductivity material is used for the abutting member, it is possible to realize characteristics such as a low peak casing temperature under the exothermic device.

대표청구항 ▼

[ What is claimed is:] [1.] A heat sink assembly for transmitting heat generated in an exothermic device to a low temperature surface comprising:an exothermic device producing heat during operation;a circuit board on which the exothermic device is mounted;a low temperature member having opposed inte

[ What is claimed is:] [1.] A heat sink assembly for transmitting heat generated in an exothermic device to a low temperature surface comprising:an exothermic device producing heat during operation;a circuit board on which the exothermic device is mounted;a low temperature member having opposed internal and external surfaces, the internal surface facing the circuit board, the exothermic device being disposed between the circuit board and the low temperature member;an abutting member arranged on the internal surface of the low temperature member, having a substantially rectangular parallelepiped shape, facing the exothermic device, and projecting toward the exothermic device; anda flexible, thermally conductive heat spreader sheet free of grooves parallel to edges of the abutting member, covering and fixed to part of the internal surface of the low temperature member, and contacting and generally conforming to the substantially rectangular parallelepiped shape of the abutting member, wherein a portion of the heat spreader sheet is urged against the exothermic device by the abutting member so that heat generated in the exothermic device is transmitted to the low temperature member via the heat spreader sheet.