A millimeter wave semiconductor device is comprised of a millimeter wave device, a wiring substrate with the millimeter wave device mounted thereto, and a sealing cap with a conductor on a surface thereof for sealing the millimeter wave device. The sealing cap has a ground potential at the conductor...http://www.google.fr/patents/US6333552?utm_source=gb-gplus-shareBrevet US6333552 - Millimeter wave semiconductor device