| 摘要 |
PROBLEM TO BE SOLVED: To provide a printed board unit that can reduce the rise in the temperature, in a printed board unit that houses more than one printed board substrates having high calorific values. SOLUTION: The printed board unit 50 has a case 10 that arranges and contains two or more printed boards 20, such that they are parallel to each other, a first printed board 20A housed in the case 10 that has a low calorific value, and a second and third printed boards 20B and 20C housed in the case 10, with the first printed board 20A in-between, which have a calorific value higher than that of the first printed board 20A. COPYRIGHT: (C)2008,JPO&INPIT
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