Patent ID: 7291790

Claim:
A method comprising: back-drilling a signal PTH coupling a surface connector to a first interior conductive layer of a printed circuit board having a plurality of interior conductive layers separated by dielectric layers and utilizing plated through holes (PTHs) connecting a pad on the surface of the printed circuit board to a first interior conductive layer, where the first interior conductive layer is not a ground layer, and with the portion of PTH extending beyond the particular interior conductive layer termed the resonant stub of the PTH, where the back-drilling removes a part of the resonant stub of signal PTH; back-drilling each ground PTH in a plurality of ground PTHs, with each ground PTH in the plurality coupled to a ground layer and disposed near the signal PTH to reduce crosstalk between signal PTHs, where back-drilling removes at least a part of the resonant stub of each ground PTH in the plurality.