Patent ID: 8120441
Filing Date: 2012-02-21
Classification: H05K

Abstract:
1. A circuit board, comprising: a signal line plane, having at least a first transmission line and a second transmission line formed thereon, wherein the first transmission line and the second transmission line have no intersection on the signal line plane; and a reference plane, having a conductive region and at least a non-conductive region, wherein the first transmission line and the second transmission line overlap the conductive region in a thickness direction of the circuit board; the non-conductive region comprises at least a first part and a second part connected to the first part; at least one of a projection of the first transmission line onto the reference plane in a thickness direction of the circuit board and a projection of the second transmission line onto the reference plane in the thickness direction of the circuit board has an intersection with the first part; and the second part is positioned between the projection of the first transmission line on the reference plane and the projection of the second transmission line on the reference plane, and has no intersection with at least one of the projection of the first transmission line and the projection of the second transmission line.