METHOD OF FABRICATING A CIRCUIT BOARD

摘要

Circuit boards and methods for their manufacture are disclosed. The circuit boards carry high-speed signals using conductors formed to include lengthwise channels. The channels increase the surface area of the conductors, and therefore enhance the ability of the conductors to carry high-speed signals. In at least some embodiments, a discontinuity also exists between the dielectric constant within the channels and just outside the channels, which is believed to reduce signal loss into the dielectric material.

主权项

1. A circuit board, comprising:
a first board dielectric layer; a second board dielectric layer that is located adjacent the first board dielectric layer; a pair of differential conductors are each located between the first board dielectric layer and the second board dielectric layer; a first local dielectric region that is located between each of the pair of differential conductors and the first board dielectric layer; and a second local dielectric region that is located between each of the pair of differential conductors and the second board dielectric layer; wherein the first local dielectric region and the second local dielectric region are configured with dielectric constants that are different than dielectric constants of the first board dielectric layer and the second board dielectric layer such that crosstalk in the pair of differential conductors is reduced.