Patent ID: 8648262
Filing Date: 2014-02-11
Classification: H05K,Y10T

Abstract:
1. An embedded multi-layer circuit board, which comprises: at least two ground layers and one power layer, the power layer is located between the two ground layers; and a plurality of vias, each via is electrically connected with the two ground layers, and each via is electrically isolated from the power layer; wherein the power layer is divided into a plurality of cells arranged periodically, and comprises a plurality of metal plates interconnected by a plurality of bridges and each cell has the same number of the vias; wherein the metal plate and the two ground layers electrically connected through the vias form a composite equivalent capacitor, the adjacent metal plates form a capacitor, and each of the bridges forms an inductor; and wherein a stop band is achieved by employing the composite equivalent capacitor, the capacitor and the inductor connected in parallel.