Patent ID: 6404110
Filing Date: 2002-06-11
Classification: H03H

Abstract:
A surface acoustic wave device comprising:a surface acoustic wave substrate; an interdigital transducer electrode located on the surface acoustic wave substrate; a lead electrode located on the surface acoustic wave substrate, the lead electrode being connected to the interdigital transducer electrode; and a bump electrode located on a portion of the lead electrodes, the bump electrode including a first electrode structure and a second electrode structure, the first electrode structure having a top surface and being disposed in contact with the lead electrode, and the second electrode structure arranged to cover a portion of the top surface of the first electrode structure such that a remaining portion of the top surface of the first electrode structure is exposed along an entire periphery of the top surface of the first electrode structure; wherein the second electrode structure comprises an Ag layer which defines a top surface of the second electrode structure.