Patent ID: 7298067

Claim:
A fluid-damped acoustic wave resonator packaging system, comprising: a piezoelectric resonator is fastened to a membrane, said piezoelectric resonator further comprising a piezoelectric substrate and an electrode metallization region on at least one surface; said membrane being positioned in a container, said membrane divides said container into a first chamber and a second chamber; said first chamber having a lid with a valve means, said valve means evacuates said chamber and introduces a fluid into said container at a predetermined pressure level; said membrane having a plurality of flow-through orifices allowing said fluid to circulate freely between said chambers; said first chamber having a first given pressure level and a first given volume; said second chamber having a second given pressure level and a second given volume; said resonator propagating an acoustic wave; an unwanted external stress impinges on said system flexing said membrane, causing said fluid to circulate between said chambers, said first given volume being increased and said second given volume being decreased; and said given first pressure level being decreased and generating an increased second chamber pressure level to damp said external stress, stabilize said membrane and provide said resonator with a reduced susceptibility to said external stress, an increased frequency stability and an enhanced pressure stability.