Patent ID: 6417574
Filing Date: 2002-07-09
Classification: H01L,H03H

Abstract:
A surface-acoustic-wave device, comprising:a piezoelectric substrate; an electrode pattern provided on a principal surface of said piezoelectric substrate, said electrode pattern forming a ladder-type surface-acoustic-wave filter; and a package body accommodating therein said piezoelectric substrate, said package body comprising: a bottom part carrying said piezoelectric substrate in a face-down state; and a side wall part laterally surrounding said piezoelectric substrate on said bottom part, said bottom part and said side wall part forming together a depression accommodating therein said piezoelectric substrate, said bottom part carrying a wiring pattern for electrical connection with said electrode pattern, said wiring pattern including a first ground pattern and a second ground pattern, lying generally in a common plane and in a mutually separated relationship within said plane on said bottom part, said first ground pattern and said second ground pattern being connected electrically with each other.