Patent ID: 8077000

Claim:
An electromagnetic bandgap structure, comprising: a dielectric layer; a plurality of conductive plates; a stitching via, configured to pass through the dielectric layer and have a part electrically connecting the conductive plates to each other by connecting through a planar surface that is different from a planar surface of the conductive plates; and a through via, wherein the dielectric layer, the conductive plates and the stitching via are placed between two conductive layers, and the through via is configured to pass through a clearance hole formed in each of the conductive plates and electrically connect the two conductive layers to each other, and the stitching via comprises a first via, passing through the dielectric layer and having one end part being connected to any one of two adjacent conductive plates of the plurality of conductive plates, a second via, passing through the dielectric layer and having one end part being connected to the other one of two adjacent conductive plates of the plurality of conductive plates, and a connection pattern, having one end part being connected to the other end part of the first via and the other end part being connected to the other end part of the second via.