ELECTROMAGNETIC BANDGAP STRUCTURE AND PRINTED CIRCUIT BOARD

摘要

An electromagnetic band-gap structure and a printed circuit board are provided to shield a coupling noise of a high frequency when an operation frequency having a high frequency band is used. An electromagnetic band gap structure wafer(300) comprises a dielectric layer and a plurality of conductive plates, a stitching via, and a through via. A switching bar penetrates a dielectric layer and connects the conductive plate by passing the conductive plate and the other plane. The trough via passes a clearance hole formed on a conductive plate and connects two conductive layers electrically.