Patent ID: 6839964
Filing Date: 2005-01-11
Classification: H05K,Y10T

Abstract:
1. A method of manufacturing a multilayer printed circuit board comprising the steps of: forming power routing circuitry on a first surface of a power layer; forming a plurality of electrically conductive blind vias in the power layer that extend from the first surface of the power layer to a second surface of the power layer, the blind vias selectively electrically contacting the power routing circuitry and some of the blind vias being aligned to establish at least one cluster of blind vias; providing signal routing circuitry and at least one signal routing channel on a first surface of at least one signal layer such that a portion of the signal routing circuitry is routed through at least one signal routing channel; combining the signal layer and the power layer such that the at least one signal routing channel aligns with the at least one cluster of blind vias; and forming a plurality of vertical, electrically conductive through-vias in the combined signal layer and the power layer such that the through-vias extend from the first surface of the signal layer to a second surface of the power layer the through-vias selectively electrically contacting the signal routing circuitry.