| 摘要 |
PROBLEM TO BE SOLVED: To provide a key sheet capable of efficiently diffusing local heats generated by devices mounted on a board. SOLUTION: A base sheet 13 on a key sheet 12 is provided with heat diffusion sheets 6 and 23 each of which includes a graphite sheet 7, resin films 8a and 8b, and in some cases a thin metal plate 22. The base sheet 13 itself thus constitutes the diffusion sheets 6 and 23. Accordingly, even if no member for heat diffusion is provided between a board 15 and the key sheet 12, it is possible to diffuse local heat generated by a semiconductor device 15b in the planar direction of the base sheet 13. Thus, with the key sheet 12, it is possible to meet the requirement for heat diffusion to eliminate local heat storage in electronic apparatus, and to meet the requirement for reduction in thickness and further in weight of the electronic apparatus. COPYRIGHT: (C)2007,JPO&INPIT
|
