Electronic control device

Abstract

The invention provides an electronic control device having a high-grade heat sink that: does not require tight control at the time of manufacturing; is structurally simple; can be produced at a higher production rate; and is cost-effective. In this device, when a circuit boardhaving an electronic componentthereon is placed in a non-metal (resin) housing having: a housing baseintegrally comprising via a partition wall lie a connector inserting sectionused for electrical connection with an external mating connector (not illustrated); and a housing coverattached to the housing base, part of the boardis inserted into an insertion hole provided in the partition wall lie so that it is exposed inside the connector inserting section. When a convex-shaped metal part, used as a heat sink, having a flangeon the bottom side is attached from an opening provided in the housing base, the top section of the metal partcomes into contact with mounting position of the electronic componenton the boardvia a heat dissipating filler material, and the flangeand the wall section near the opening are brought into contact with each other via a sealing filler material