Patent ID: 8472197

Claim:
A resin-sealed electronic control device, comprising: a first electronic board and a second electronic board, each carrying a plurality of circuit components mounted thereon and each being electrically connected to a plurality of external connection terminals; a thermally conductive support plate comprising an upper surface and a lower surface, on which the first electronic board and the second electronic board are respectively bonded to be fixed; and an exterior covering material obtained by entirely covering the first electronic board and the second electronic board and partially covering the plurality of external connection terminals and the support plate with a synthetic resin, wherein: the support plate comprises: a window hole portion to be filled with a viscous fluid filler; and an exposed retaining portion formed on at least one of two sides of the window hole portion to be externally exposed; the plurality of circuit components are mounted on both an upper surface and a lower surface of at least one of the first electronic board and the second electronic board, and one of the first electronic board and the second electronic board comprises a through hole for filling the window hole portion with the filler; and the first electronic board and the second electronic board respectively comprise peripheral edge portions on inner surfaces, which are respectively bonded to be fixed to the upper surface and the lower surface of the support plate by adhesives, and inner circuit components mounted on the inner surface of at least one of the first electronic board and the second electronic board are housed in the window hole portion.