Circuit Board With Reduced Non-Uniform Dielectric Effects

Abstract

A system and method for minimizing the effects of non-uniform dielectric properties includes forming traces on printed circuit boards (PCB) where the fibers within the printed circuit boards are non-rectangular with respect to the rectangular edges of the circuit board. The orientation of the traces with respect to the fibers substantially minimizes the effects of non-uniform dielectric properties of the PCB.

1 - 20 . (canceled)  
   
   
       21 . An information handling system comprising: 
 a printed circuit board (PCB) having a laminate structure including a first plurality of generally electrically non-conductive fibers extending in a first direction and a second plurality of generally electrically non-conductive fibers extending in a second direction, the second direction offset from the first direction;    a transmitter module associated with the PCB;    a receiver module associated with the PCB; and    an electrically conductive trace formed on the PCB for communicating electrical signals between the transmitter module and the receiver module, at least a portion of the electrically conductive trace extending along a third direction offset from both the first direction and the second direction.    
   
   
       22 . An information handling system according to  claim 21 , wherein: 
 the PCB is formed from an epoxy resin laminate; and    the first and second generally electrically non-conductive fibers are disposed within the epoxy resin.    
   
   
       23 . An information handling system according to  claim 21 , wherein the second direction is generally perpendicular to the first direction.  
   
   
       24 . An information handling system according to  claim 21 , wherein the third direction is offset approximately forty-five degrees from the first direction.  
   
   
       25 . An information handling system according to  claim 21 , wherein the third direction is generally parallel with an edge of the PCB.  
   
   
       26 . An information handling system according to  claim 21 , wherein the third direction is offset at least ten degrees from the first direction.  
   
   
       27 . An information handling system according to  claim 21 , wherein the third direction is offset at least thirty degrees from the first direction.  
   
   
       28 . An information handling system according to  claim 21 , wherein the electrically conductive trace is a part of a differential pair of electrically conductive traces for communicating electrical signals between the transmitter module and the receiver module.  
   
   
       29 . An information handling system according to  claim 28 , wherein the angle of the third direction relative to the first direction is selected to maximize uniformity of dielectric properties between the pair of electrically conductive traces.  
   
   
       30 . A printed circuit board (PCB) comprising: 
 a laminate structure including a first plurality of generally electrically non-conductive fibers extending in a first direction and a second plurality of generally electrically non-conductive fibers extending in a second direction, the second direction offset from the first direction; and    a pair of electrically conductive traces formed on the PCB for communicating electrical signals between a transmitter and a receiver, at least a portion of each electrically conductive trace extending along a third direction offset from both the first direction and the second direction.    
   
   
       31 . A printed circuit board according to  claim 30 , wherein: 
 the laminate structure comprises an epoxy resin laminate; and    the first and second generally electrically non-conductive fibers are disposed within the epoxy resin.    
   
   
       32 . A printed circuit board according to  claim 30 , wherein the second direction is generally perpendicular to the first direction.  
   
   
       33 . A printed circuit board according to  claim 30 , wherein the third direction is offset approximately forty-five degrees from the first direction.  
   
   
       34 . A printed circuit board according to  claim 30 , wherein the third direction is generally parallel with an edge of the PCB.  
   
   
       35 . A printed circuit board according to  claim 30 , wherein the third direction is offset at least ten degrees from the first direction.  
   
   
       36 . A printed circuit board according to  claim 30 , wherein the third direction is offset at least thirty degrees from the first direction.  
   
   
       37 . A printed circuit board according to  claim 30 , wherein the angle of the third direction relative to the first direction is selected to maximize uniformity of dielectric properties between the pair of electrically conductive traces.  
   
   
       38 . A printed circuit board (PCB) comprising: 
 a laminate structure including a first plurality of generally electrically non-conductive fibers extending in a first direction and a second plurality of generally electrically non-conductive fibers extending in a second direction, the second direction offset from the first direction; and    an electrically conductive trace formed on the PCB for communicating electrical signals, at least a portion of the electrically conductive trace extending along a third direction offset from both the first direction and the second direction.    
   
   
       39 . A printed circuit board according to  claim 38 , further comprising: 
 a transmitter module associated with the PCB; and    a receiver module associated with the PCB; and    wherein the electrically conductive trace communicates electrical signals between the transmitter module and the receiver module.    
   
   
       40 . A printed circuit board according to  claim 38 , wherein: 
 the second direction is generally perpendicular to the first direction; and    the third direction is offset at least thirty degrees from the first direction.