Patent ID: 6037547
Filing Date: 2000-03-14
Classification: H05K,Y10T

Abstract:
A method of making a printed wiring board comprising the steps of:providing a printed wiring board layer;defining a plurality of vias in the layer, each via having a non-circular cross section, wherein each via cross section is elongated, having a long dimension along a major axis and a short dimension along a minor axis; andintroducing an electrically conductive material into the vias, wherein vias are formed in an array having major axes, the major axes of the vias being aligned at an acute angle to one of the major axes of the array, wherein the vias are formed in a rectangular array, and the major axes of the vias are aligned at an angle of between 15.degree. and 75.degree. to one of the major axes of the array, wherein the vias have an ellipticity in the range of 1.1 to 1.5.