Patent ID: 8553426
Filing Date: 2013-10-08
Classification: H05K

Abstract:
1. A circuit board, comprising: a plurality of conductive layers positioned spacedly and parallels, each conductive layer comprising a conductive portion; at least one electronic element electronically connecting to the conductive portion on the surface; at least one power supply element electronically connecting to the conductive portion on the surface; at least one group of first vias defined through all the conductive layers, and electrically connecting each conductive portion, each group of the first vias surrounding a power supply element of the circuit board, configured to distribute current from the power supply element to each conductive layer; and a plurality of second vias defined through all the conductive layers, and electrically connecting each conductive portion, the second vias being positioned between the power supply element and the electronic element, and arranged along the peripheral edge of the conductive portion, the second vias configured for guiding current of each conductive layer to flow to a conductive layer having a lower resistance and to the at least one electronic element, wherein the first portion of the current flowing through the inner conductive layers and the second portion of the current flowing through the surface conductive layer are converged at the component holes on the surface conductive layer and input into the electronic element through the surface conductive layer.