Acoustic wave device and method for manufacturing same

摘要

An SAW device (1) has a piezoelectric substrate (3) propagating acoustic waves, and a comb-shaped electrode (6) arranged on a first surface (3a) of the piezoelectric substrate (3). The SAW device (1) has a columnar terminal (15) located on the first surface (3a) and electrically connected to the comb-shaped electrode (6), and a cover member (9) covering a side surface of the terminal (15). The terminal (15) comprises, in a first region in the direction of height thereof, a larger diameter on the side of the first surface (3a) compared with the diameter on the side opposite to the first surface (3a).

主权项

1. An acoustic wave device, comprising:
a substrate configured to propagate acoustic waves; an excitation electrode located on a surface of the substrate; a connection-use conductor located on the surface of the substrate and electrically connected to the excitation electrode; a terminal of with a pillar-shaped located on the surface of the substrate, electrically connected to the connection-use electrode and comprising a first region in the direction of height thereof with a cross-sectional area of a surface side larger than a cross-sectional area of an opposite side with respect to the surface; and a cover member covering a side surface of the first region of the terminal.