In the field of smartphones, the density of mounting a wide variety of components is increasing, and jet dispensers that apply a small amount of adhesive by skipping it are often used in the mounting. Piezo can push high-viscosity adhesives at high speeds and fly them far away. As a result, fine pattern-shaped adhesive can be applied at the correct position. Furthermore, piezo can be driven repeatedly at high frequencies, thereby increasing productivity. The AE series is used in various jet dispensers because it has stable repetitive displacement performance, even at high speeds.