Package for an electrical apparatus and method of manufacturing therefore

The present invention is directed to packages for electrical apparatuses. In particular, the present invention is directed to packages for electrical apparatuses employing insulated metal substrate elements in their construction. The present invention includes packages for electrical apparatuses needing a heat dissipation structure, such as a heat sink, included in the package. A package for an electrical apparatus is disclosed. The electrical apparatus includes a plurality of electrical components; the package comprises: (a) a first circuit board having a top side and a bottom side, and having a first array of the plurality of components arranged on at least one side of the top side and the bottom side; (b) a second circuit board in electrical and mechanical connection with the first circuit board; the second circuit board has a first side and a second side. The first side faces the top side of the first circuit board. The second circuit board has a second array of the plurality of components arranged on the first side. The second circuit board preferably has at least one heat dissipating structure substantially integrally affixed on the second side. Preferably, the second side is a metal substrate and the first side is electrically insulated from the second side. The package may further include one circuit board presenting an integral connection structure extending a standoff distance measured substantially perpendicular to the plane of the circuit board. The connection structure is affixed with the other circuit board when the package is in an assembled orientation. The method for manufacturing the apparatus comprises the steps of: (a) providing an insulated metal substrate presenting a first component bearing side and a second metallic side electrically insulated from each other; (b) providing a heat dissipating structure; and (c) substantially integrally affixing the heat dissipating structure with the substrate at the second side.