Patent ID: 6566981
Filing Date: 2003-05-20
Classification: H03H

Abstract:
A surface acoustic wave device comprising:(i) a container, (ii) input external terminals, output external terminals and ground external terminals which are disposed at the outer peripheral surfaces of said container, and (iii) input pads, output pads and ground pads which are disposed inside of a cavity portion of said container and which are respectively electrically connected to said input external terminals, said output external terminals and said ground external terminals; a plurality of SAW filter elements housed in said cavity portion of said container; a plurality of ground conductor films respectively formed in the areas where said SAW filter elements are housed in said cavity portion, a total number of ground conductor films equaling a total number of SAW filter elements housed in said cavity portion; and a metallic lid which hermetically seals said cavity portion of said container; wherein the input electrodes, output electrodes and ground electrodes of said SAW filter elements are respectively connected to said input pads, said output pads and said ground pads, said ground conductor films respectively formed in the areas where said SAW filter elements are respectively housed, being electrically separated from one another within said container.