Patent ID: 6166476
Filing Date: 2000-12-26
Classification: H01L,H03H

Abstract:
A 1-port surface acoustic wave device comprising:a 1-port surface acoustic wave resonator including a surface acoustic wave substrate, at least two input/output bump electrodes electrically connected to an interdigitated electrode on the surface acoustic wave substrate and at least two dummy bump electrodes each made of an electrically conductive electrode material and disposed on said surface acoustic wave substrate so as to be free from connection to other elements, and a 2-port surface acoustic wave resonator base substrate on which input/output electrode lands and dummy electrode lands each made of an electrically conductive electrode material are disposed so as to be configured to receive at least four input/output bump electrodes of a 2-port surface acoustic wave resonator, the input/output electrode lands being connected to extraction electrodes and via holes and the dummy electrode lands not being connected to extraction electrodes and via holes; whereinsaid at least two input/output bump electrodes and said at least two dummy bump electrodes are solder-bump bonded to respective ones of said input/output electrode lands and said dummy electrode lands so that said 1-port surface acoustic wave resonator is joined to said two port resonator base substrate in a face-down arrangement.