Patent ID: 7745933

Claim:
A circuit structure, comprising: a first dielectric layer; a first circuit pattern, embedded in the first dielectric layer and having at least one first via pad; at least one first conductive via, passing through the first dielectric layer and connected to the first via pad; at least one independent via pad, disposed on a surface of the first dielectric layer away from the first via pad and connected to one end of the first conductive via away from the first via pad; a second dielectric layer, disposed over a surface of the first dielectric layer where the independent via pad is disposed; at least one second conductive via, passing through the second dielectric layer and connected to the independent via pad; and a second circuit pattern, embedded in the second dielectric layer and located at a surface of the second dielectric layer away from the independent via pad, wherein the second circuit pattern has at least one ring-shape pad exposed from the second dielectric layer and an empty space surrounded by the ring-shape pad is filled with conductive material such that the conductive material and the ring-shape pad together form at least one second via pad connected to the second conductive via, wherein a surface of the ring-shape pad, a surface of the conductive material and a surface of the second dielectric layer substantially form a plane, such that the surface of the ring-shape pad and the surface of the conductive material collectively form a surface of the second via pad.