| 摘要 |
An I/O routing pattern method is disclosed, for use with heterogeneous printed circuit boards (PCBs), such as those embedded with a reinforcement material, for example, a fiberglass weave. Traces are routed on the PCB so as to reduce sensitivity to changes in the dielectric constant (D<SUB>k</SUB>), which are brought about by the strands of reinforcement material contained within the PCB laminate. The method minimizes the local variations, such as the D<SUB>k</SUB>, time of flight, and capacitance variations, that are observed with traditional routing methods on heterogeneous PCBs.
|
