Patent ID: 6339365
Filing Date: 2002-01-15
Classification: H01L,H03H

Abstract:
A surface acoustic wave device, comprising:a package comprising a base on a first main surface thereof on which a plurality of signal conductors and a ground conductor are formed; a first surface acoustic wave chip disposed over the base in a face down way, comprising a plurality of first interdigital transducers formed on the first main surface of a first piezoelectric substrate, first signal terminals disposed on the first main surface, and a first ground terminal disposed on the first main surface; a second surface acoustic wave chip disposed over the base in a face down way, including a plurality of second interdigital transducers disposed on a second main surface of a second piezoelectric substrate, second signal terminals disposed on the second main surface, and a second ground terminal disposed on the second piezoelectric substrate; and wherein each of the first and the second signal terminals are bonded to each of the plurality of signal conductors through a bump, both of the first and the second ground terminals are bonded to the ground conductor in common through bumps, a plurality of portions of the ground conductor are projected between adjacent signal conductors, and each of the portions of the ground conductor is respectively connected to wiring.