Patent ID: 8498128

Claim:
A printed circuit board (PCB), comprising: five insulation layers; six circuit layers, wherein the insulation layers and the circuit layers are stacked alternately; one insulation layer is positioned between two adjacent circuit layers, the circuit layers comprise four first circuit layers, a ground layer and a second circuit layer, the ground layer comprises a first side and a second side facing away from the first side, the first circuit layers are positioned on the first side and comprise an outmost first circuit layer and three inner first circuit layers positioned between the outmost first circuit layer and the ground layer, and the second circuit layer are positioned on the second side; a signal-interfering component positioned on the outmost first circuit layer away from the ground layer; and a signal-sensitive component positioned on the second circuit layer; wherein each of two of the three inner first circuit layers except the inner first circuit layer adjacent to the outmost first circuit layer defines a copper-remove area under the signal-interfering component.