Patent ID: 7459200
Filing Date: 2008-12-02
Classification: H05K,Y10T

Abstract:
1. A circuit board system comprising: a circuit board comprised of a fiberglass material bonded to a substrate using resin; first and second signal line traces located on the circuit board for transmitting electrical signals at frequencies of one gigahertz or above, the first and second signal line traces having a width of approximately 5 mils and being spaced apart by approximately 5 mils; and a first set of fiberglass fibers arranged in a zig-zag manner wherein each fiberglass fiber includes one or more vertices, a second set of fiberglass fibers arranged in a zig-zag manner wherein each fiberglass fiber includes one or more vertices and combined with said first set of fiberglass fibers to from a herringbone design; wherein the first set of fiberglass fibers being arranged in a zig-zag manner to assist in reducing a differential to common mode conversion between electrical signals, wherein a first area of the circuit board has a fiberglass-to-resin concentration higher than that of a second area of the board, and wherein one of the signal line traces is located in the first area and the other of the signal line traces is located in the second area.