Patent ID: 8035034

Claim:
A printed circuit board, comprising: a base formed from a plurality of parallel first fibers and parallel lengthways fibers; and a signal trace laid on the base, the signal trace comprising a plurality of straight line segments parallel to the first fibers, the signal trace laid on the base in such a manner that the line segments of the signal trace mapped on the base partly superpose the first fibers and partly superpose gaps between two adjacent first fibers; wherein a perpendicular distance between centerlines of two adjacent first fibers being P, a width of the first fiber being F, and a width of the signal trace being W; the line segments comprise a first line segment, a second line segment, a third line segment, and a fourth line segment; a perpendicular distance between the centerlines of the first line segment and the second line segment being P/2; a variable X defined as a perpendicular distance between the centerlines of the second line segment and the third line segment; the first line segment and the third line segment being on the same side of the second line segment, the second line segment and the fourth line segment being on the same side of the third line segment; a perpendicular distance between the centerlines of the fourth line segment and the third line segment is P/2; upon the condition that P satisfies: 2(W+F)<P<4(W+F), X satisfies: P/2−W−F<x<P−F+W; upon the condition that P satisfies: 4(F−W)/3<P<2(F−W), X satisfies: F-P/2−W<x<P−F+W.