Abstract: An acoustic resonator that has a first electrode with a first planar portion. A second electrode having a second planar portion is disposed parallel to the first planar portion. This second electrode has a bifurcated end that defines a gap. A piezoelectric layer is disposed between and contacts both the first planar portion and the second planar portion. Also contacting the piezoelectric layer is the bifurcated end of the second electrode. The gap is formed in the periphery of each resonator within a filter. It is formed in the top electrode, that is typically formed of molybdenum, but could be formed from other metals as well. Unlike a gap between a top electrode and piezoelectric material, the gap recited herein is entirely within the second electrode. This structure is compatible with an inner passivation layer that enables a single crystal piezoelectric layer and a larger bottom electrode.

Abstract: An inspiratory trigger atomizer for a patient with an airway disease, including: a main body including an atomization module and a nozzle connected thereto; an atomization driver; an air pressure sensor electrically connected to the driver, and a gas guide channel arranged in the main body, with a first end located in the nozzle and a second at a monitoring end of the sensor. The sensor acquires the air pressure in the nozzle that changes with the patient's breathing, identifies the inhalation state of the patient and generates a corresponding signal to trigger a main unit module to start the atomization driver. The atomizer has an extremely short inspiratory trigger response time, such that atomization can be quickly triggered after the patient inhales, and with atomization duration being 1.5 s, the patient can fully inhale a drug, so the atomizer can be applied to a wide range of people.

Abstract: An acoustic resonator that has a first electrode with a first planar portion. A second electrode having a second planar portion is disposed parallel to the first planar portion. This second electrode has a bifurcated end that defines a gap. A piezoelectric layer is disposed between and contacts both the first planar portion and the second planar portion. Also contacting the piezoelectric layer is the bifurcated end of the second electrode. The gap is formed in the periphery of each resonator within a filter. It is formed in the top electrode, that is typically formed of molybdenum, but could be formed from other metals as well. Unlike a gap between a top electrode and piezoelectric material, the gap recited herein is entirely within the second electrode. This structure is compatible with an inner passivation layer that enables a single crystal piezoelectric layer and a larger bottom electrode.