Patent ID: 6774748
Filing Date: 2004-08-10
Classification: H01L,H01P

Abstract:
An RF package, comprising:a multilayered dielectric substrate including first and second dielectric substrates, said multilayered dielectric substrate having a cavity in the second dielectric substrate where a semiconductor element is to be mounted on the first dielectric substrate within said cavity; a feed-through for connecting an inside and outside of said cavity and comprised of a coplanar line disposed on said first dielectric substrate and an inner layer line disposed on the first dielectric substrate obtained by disposing said second dielectric substrate on said coplanar line, said coplanar line and said inner layer line sharing a signal conductor disposed on the first dielectric substrate; metal members disposed at a connection interface between said coplanar line and said inner layer line on two sides of said signal conductor, and connecting first ground conductors of the coplanar line and the inner layer line on the first dielectric substrate to a second ground conductor disposed on a top surface of the second dielectric substrate at an edge of the second dielectric substrate; and a plurality of first via holes disposed in said first dielectric substrate and a plurality of second via holes disposed in said second dielectric substrate; and wherein edges of said metal members at said connection interface measuring a first length at said connection interface, said first length being larger than a diameter of at least one of: a portion of said plurality of first via holes in said first dielectric substrate, and a portion of said plurality of second via holes in said second dielectric substrate.