Patent ID: 8334737
Filing Date: 2012-12-18
Classification: H03H

Abstract:
1. An acoustic wave device comprising: a piezoelectric substrate; an interdigital transducer (IDT) electrode provided on the piezoelectric substrate; an internal electrode provided above the piezoelectric substrate and electrically connected to the IDT electrode; a side wall provided above the internal electrode and surrounding the IDT electrode; a lid provided on the side wall for covering the IDT electrode to provide a space above the IDT electrode; an electrode base layer provided on the internal electrode and outside the space and the side wall; a connection electrode provided on the electrode base layer; and an anti-corrosion layer provided between the internal electrode and the side wall, the anti-corrosion layer protruding outside the side wall, the anti-corrosion layer being made of material less soluble in plating solution than the internal electrode.