Patent ID: 7064632
Filing Date: 2006-06-20
Classification: H01L,H01P,H05K

Abstract:
1. A circuit-board assembly comprising: a first planar circuit-board having a surface and including: a first planar dielectric substrate; and a planar first circuit layer at the surface of the first circuit-board, the first circuit layer being a passive microwave circuit; a second planar circuit-board having a surface to which the first planar circuit-board is connected, the second planar circuit-board including: an electrically conductive ground layer; a second circuit layer at the surface of the second planar circuit-board; and a second dielectric substrate between the ground layer and the second circuit layer, the second dielectric substrate having a through hole, the dielectric constant of the second dielectric substrate being less than about half the dielectric constant of the first dielectric substrate; and the assembly further comprising an electrical interconnection extending between the first circuit layer and the second circuit layer.