Patent ID: 9674941
Date: 2017-06-06
CPC Classifications: H05K

Claim:
1. A printed circuit board for mobile platforms, comprising: a core substrate having a first side and an opposing second side; a first ground plane layer covering the first side; a first insulating layer covering the ground plane layer; a plurality of first signal traces and a plurality of first ground traces, alternately arranged on the first insulating layer; a second insulating layer connecting to the first insulating layer; a plurality of second signal traces separated from each other, disposed on the second insulating layer, wherein the second signal traces are disposed directly over spaces between the first signal traces and the first ground traces adjacent thereto, wherein coverage of the ground plane layer corresponds to disposition of the first signal traces, the first ground traces, and the second signal traces; a second ground plane layer covering the second side of the core substrate; a third insulating layer covering the second ground plane layer; a plurality of third signal traces and a plurality of third ground traces, alternately arranged on the third insulating layer; a fourth insulating layer connecting to the third insulating layer; and a plurality of fourth signal traces separated from each other, disposed on the fourth insulating layer, wherein the fourth signal traces are disposed directly over spaces between the third signal traces and the third ground traces adjacent thereto, wherein coverage of the second ground plane layer corresponds to disposition of the third signal traces, the third ground traces, and the fourth signal traces.