Abstract: An electronic control device enabling heat generated by a power module to be favorably radiated even in a high-temperature condition in an engine compartment. The unit includes a casing accommodating a control circuit substrate; a die-cast mounting plate forming a control circuit substrate support portion, a frame-like fitting member and an external mounting portion integrally together; and a metal substrate on which a power module is adhered. When the mounting plate is mounted on the wall of a transmission and the metal substrate is fitted in the opening in the bottom surface of the frame-like fitting member, a mounting surface in nearly the same plane is formed by the lower surface of the mounting plate and by the lower surface of the metal substrate permitting heat from the power module to be radiated to the wall.

Abstract: The present invention concerns a substrate for circuit wiring in which an electronic component is mounted, by soldering, to a wiring pattern formed on an insulated layer deposited over a metallic substrate. A silica-based filler and a rubber-based filler are added in the insulated layer to reduce the linear thermal expansion of the layer and increase its elastic modulus. The mounting portion of an electronic component is molded with a resin material to which a silica-based filler has been added, and which thus has a coefficient of linear thermal expansion smaller than the coefficient of linear thermal expansion of the insulated layer. This serves to alleviate the stress caused by the linear thermal expansion of the metallic substrate, and thereby to prevent separation from occurring between the insulated layer and the metallic substrate, as well as between the insulated layer and the wiring pattern, when subjected to a high-temperature environment.

Abstract: An electronic control device enabling heat generated by a power module to be favorably radiated even in a high-temperature condition in an engine compartment. The unit includes a casing accommodating a control circuit substrate; a die-cast mounting plate forming a control circuit substrate support portion, a frame-like fitting member and an external mounting portion integrally together; and a metal substrate on which a power module is adhered. When the mounting plate is mounted on the wall of a transmission and the metal substrate is fitted in the opening in the bottom surface of the frame-like fitting member, a mounting surface in nearly the same plane is formed by the lower surface of the mounting plate and by the lower surface of the metal substrate permitting heat from the power module to be radiated to the wall.

Abstract: The present invention concerns a substrate for circuit wiring in which an electronic component is mounted, by soldering, to a wiring pattern formed on an insulated layer deposited over a metallic substrate. A silica-based filler and a rubber-based filler are added in the insulated layer to reduce the linear thermal expansion of the layer and increase its elastic modulus. The mounting portion of an electronic component is molded with a resin material to which a silica-based filler has been added, and which thus has a coefficient of linear thermal expansion smaller than the coefficient of linear thermal expansion of the insulated layer. This serves to alleviate the stress caused by the linear thermal expansion of the metallic substrate, and thereby to prevent separation from occurring between the insulated layer and the metallic substrate, as well as between the insulated layer and the wiring pattern, when subjected to a high-temperature environment.

Abstract: A substrate 10 includes multiple layers mounted with a mounted part 20 at its surface. A part pad 40 is provided to the substrate 10 to correspond to an electrode of the mounted part 20. A circuit pattern is provided at a layer at an inner portion of the substrate and an electrically conductive portion 60 for electrically connecting the part pad 40 and the circuit pattern right under the part pad 40.

Abstract: A substrate 10 includes multiple layers mounted with a mounted part 20 at its surface. A part pad40 is provided to the substrate 10 to correspond to an electrode of the mounted part 20. A circuit pattern is provided at a layer at an inner portion of the substrate and an electrically conductive portion 60 for electrically connecting the part pad 40 and the circuit pattern right under the part pad 40.