Patent ID: 7903410

Claim:
A package board comprising: a first metal layer; a heat-release layer stacked on the first metal layer with a first insulation layer interposed in-between, the heat-release layer being made of a metallic material; a cavity formed in the heat-release layer; a mounting layer formed in the cavity in contact with the first insulation layer, the mounting layer being made of a metallic material and directly connected to the heat-release layer; a first component mounted on the mounting layer, a lower surface of the first component being in contact with the mounting layer, and a heat generated in the first component being transferred to the heat-release layer through the mounting layer; a first electrode portion isolated from the mounting layer and the heat-release layer, the first component and the first electrode portion being electrically connected by wire bonding, and the first electrode being connected to the first metal layer through a via penetrating the first insulation layer; and a second insulation layer covering at least a portion of the heat-release layer and the cavity.