Patent ID: 8013254

Claim:
A PCB comprising: a first ground layer extended in one direction; a first dielectric layer laminated one the first ground layer and extended in the same direction as that of the first ground layer; a signal transmission line laminated on the first dielectric layer and extended in the same direction as that of the first dielectric layer; a first ground pattern formed by etching a surface of the first ground layer in an axial direction thereof with a predetermined width; and a plurality of second ground patterns formed by etching the surface of the first ground layer at both sides of the first ground pattern in the axial direction at a predetermined interval in a line, wherein a part of each of the plurality of second ground patterns, far from the first ground pattern, has a greater width than that of another part thereof, close to the first ground pattern, and wherein the first ground pattern and the plurality of second ground patterns expose the first dielectric layer.