Patent ID: 7375979

Claim:
A printed circuit board, comprising: at least one high density interconnect (HDI) substrate having first and second metal layers; a first runner formed of: a first set of individual upper runner portions etched on the first metal layer at a first predetermined angle; a second set of individual lower runner portions etched on the second metal layer at an angle orthogonal to the first predetermined angle; a microvia coupling the first set of individual upper runner portions to the second set of individual lower runner portions; a second runner formed of: a third set of individual upper runner portions etched on the first metal layer at the first predetermined angle in between the first set of individual upper runner portions; a fourth set of individual lower runner portions etched on the second metal layer at the angle orthogonal to the first predetermined angle in between the second set of individual lower runner portions; a microvia coupling the third set of individual upper runner portions to the fourth set of individual lower runner portions; and the first and second runners providing a differential pair for transferring a differential signal.