Patent ID: 8031474

Claim:
A printed circuit board assembly comprising: a plurality of printed circuit boards including a first printed circuit board including a first plurality of layers and a second printed circuit board including a second plurality of layers, the first printed circuit board mechanically and electrically connected to the second printed circuit board in a stacked arrangement; and a connection layer connecting the first and second printed circuit boards adjacent to each other, wherein the connection layer includes an insulation portion and an electric conduction portion, the insulation portion including an insulating member adhered between the adjacent first and second printed circuit boards, and the electric conduction portion passing through the insulation portion and connecting a first electrode terminal of the first printed circuit board to an adjacent second electrode terminal of the second printed circuit board, wherein the connection layer includes a space formed by opening a part of a surface of the connection layer, said surface connecting to at least one of the printed circuit boards, and wherein an electronic component is mounted on one of the printed circuit boards to be arranged in the space, the electronic component being connected to wiring of said one of the printed circuit boards, wherein the insulation portion includes an insulating plastic material that connects the adjacent first and second printed circuit boards to each other; wherein the electric conduction portion includes an electrical conducting paste including a low-melting metal particle and a high-melting metal particle, and the electric conduction portion is connected to the first electrode terminal and the second electrode terminal of the adjacent first and second printed circuit boards by using metallizing technology which connects metals to each other by applying a predetermined pressure thereto at a predetermined temperature; wherein the insulation portion includes a thermoplastic resin as the insulating plastic material; wherein the electrical conducting paste includes tin as a low-melting metal particle and at least one of copper and silver as a high-melting metal particle; wherein a curable epoxy resin is applied to a first surface of the first printed circuit board and a second surface of the second printed circuit board, the first and second surfaces adhering to an adhesive layer of the connection layer; and wherein the thermoplastic resin has a chemical affinity for the curable epoxy resin.