Patent ID: 8222976
Filing Date: 2012-07-17
Classification: H01L,H01P,H05K

Abstract:
1. A multilayer dielectric substrate having a cavity formed on a dielectric substrate and in which a semiconductor device is incorporated within the cavity, the multilayer dielectric substrate comprising a cavity-resonance suppressing circuit that includes: an opening formed in a surface-layer ground conductor arranged on the dielectric substrate within the cavity; an impedance transformer that is formed in the dielectric substrate, electrically connected via the opening to the cavity, and has a length of an odd multiple of about ¼ of in-substrate effective wavelength of a signal wave; a tip-short-circuited dielectric transmission line that is formed in the dielectric substrate and has a length of an odd multiple of about ¼ of in-substrate effective wavelength of a signal wave; a coupling aperture formed at a part of an inner-layer ground conductor where the impedance transformer is connected to the dielectric transmission line; and a resistor formed in the coupling aperture, wherein the multilayer dielectric substrate comprises: