PRINTED BOARD UNIT, COMMUNICATION DEVICE, AND PRINTED BOARD

摘要

PROBLEM TO BE SOLVED: To cool a heating portion intensively by a low-cost structure. SOLUTION: The heat generated by a heating element 11 mounted on a printed board 10 is first transmitted to an earth pattern 14 which is formed on the opposite surface of the printed board 10 and is thermally connected to the heating element 11. Then is transmitted to a heat radiation fin 22 set up in a back wired board 21 via a heat-conducting clenching member 15 so arranged as to be in contact with the earth pattern 14 and a heat-conducting member 23 clenched by the clenching member 15, and finally is emitted outside. COPYRIGHT: (C)2006,JPO&NCIPI