Patent ID: 7642571

Claim:
A substrate, comprising: a metallic board in a single layer with two structure portions comprising: a first patterned metallic layer; and a second patterned metallic layer, wherein one surface of the first patterned metallic layer is connected to a corresponding surface of the second patterned metallic layer such that the first patterned metallic layer and the second patterned metallic layer are the two structure portions as a single-body structure; an insulator having two portions formed of the same material respectively disposed in gaps in the first patterned metallic layer and the second patterned metallic layer; and a first dielectric layer and a third patterned metallic layer, wherein the first dielectric layer is disposed on the first patterned metallic layer and the insulator, the third patterned metallic layer is disposed on the first dielectric layer, and the first dielectric layer has at least a gap for electrically connecting the third patterned metallic layer to the first patterned metallic layer.