| 摘要 |
A circuit board is disposed on a support plate, with electronic components mounted on this circuit board being accommodated in recessed portions of the support plate. Thermal adhesive members intervene between rear surfaces of the electronic components and bottom surfaces of the recessed portions of the support plate. The support plate has degassing grooves. Furthermore, the support plate has raised portions provided on its upper surface for supporting the circuit board in a floated condition with a gap between them.
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