PRINTED CIRCUIT BOARD

摘要

A printed circuit board includes a first dielectric layer, a first ground layer, a second dielectric layer, a first power layer, a first via hole and a ground hole extending through the printed circuit board. A first signal line is laid on the first dielectric layer. A third signal line is laid on the second dielectric layer. The first and third signal lines are electrically connected to the first via hole. An extending direction of the first signal line on the first dielectric layer is the same as an extending direction of the third signal line is laid on the second dielectric layer. A first void area is defined in the first ground layer around the first via hole. A second void area is defined in the first power layer around the first via hole. The ground hole is outside the first void area and the second void area.

主权项

1. A printed circuit board, comprising:
a first dielectric layer with a first signal line laid thereon; a first ground layer; a second dielectric layer with a third signal line laid thereon; a first power layer; a first via hole extending through the first dielectric layer, the first ground layer, the second dielectric layer, and the first power layer; and a ground hole, wherein the first signal line and the third signal line are electrically connected to the first via hole, and an extending direction of the first signal line is the same as an extending direction of the third signal line; a first void area is defined in the first ground layer around the first via hole, and a second void area is defined in the first power layer around the first via hole; and the ground hole is outside the first void area and the second void area.