Patent ID: 7122881
Filing Date: 2006-10-17
Classification: H01L,H05K

Abstract:
1. A wiring board comprising: interlayer insulating films; multilayer wiring films, each being provided at one of the interlayer insulating films or between two of the interlayer insulating films; interlayer-connection conductor films, each extending through at least one of the interlayer insulating films and providing an electrical connection between at least two of the multilayer wiring films; at least one semiconductor integrated circuit device; a first shield wiring film on which the semiconductor integrated circuit device is directly mounted; a second shield wiring film provided so as to oppose the first wiring film with the semiconductor integrated circuit device interposed therebetween; and a plurality of shield interlayer-connection conductor films that are provided so as to surround a periphery of the semiconductor integrated circuit device and that provide electrical connections between the first shield wiring film and the second shield wiring film, each shield interlayer-connection conductor film extending through at least one of the interlayer insulating films, wherein the first and second shield wiring films have a gap therebetween, the gap being smaller than one half a wavelength λg of an electromagnetic wave to be prevented from radiating, and wherein the first and second shield wiring films and the shield interlayer-connection conductor films define a shield cage having a rectangular-parallelepiped inner space with height a, width b, and length c, where a≦b≦c, and a wavelength λg of an electromagnetic wave to be prevented from radiating satisfies a relationship: