Patent ID: 8081052

Claim:
An electromagnetic bandgap structure, comprising: a plurality of conductive plates, placed between two conductive layers; and a stitching via, configured to make an electrical connection between any two of the conductive plates, wherein the stitching via comprises a first via, one end part of the first via being connected to any one of the two conductive plates; a second via, one end part of the second via being connected to the other of the two conductive plates; and a connection pattern, placed on a planar surface that is different from the conductive plates, between the two conductive layers and configured to make an electrical connection between the other end part of the first via and the other end part of the second via, whereas any one of the first via and the second via, which is a plated through hole (PTH)), penetrates at least one of the two conductive layers and is electrically disconnected from one of the penetrated conductive layers.