Patent ID: 6653557
Filing Date: 2003-11-25
Classification: G02B,H05K

Abstract:
A Faraday cage to enclose an optical device, the Faraday cage extending between a metalized plate and an upper enclosure, the upper enclosure is vertically spaced from the metalized plate, the Faraday cage limits the passage of Electromagnetic Interference (EMI), the Faraday cage comprising:one or more ceramic wall portions that extend from the metalized plate to the upper enclosure and limit the passage of EMI through the ceramic wall portions, the ceramic wall portions including: a plurality of laminated ceramic layers, each one of the laminated ceramic layers extends substantially parallel to the metalized plate, and a plurality of vias extending substantially perpendicular to the metalized plate through the laminated ceramic layers, each one of the plurality of vias extends substantially from the metalized plate to the upper enclosure, the plurality of vias are configured to form a pattern that limits said passage of EMI through the vias, wherein said metalized plate, said upper enclosure, and said one or more ceramic wall portions define a Faraday cage that surrounds said optical device.