초록 ▼

An ultrasonic liquid ejecting unit comprises a piezoelectric transducer coated with a conductive film on each of its front and rear surfaces, a nozzle plate secured to the transducer to form a bimorph vibration system and a body having a liquid chamber defined by the nozzle plate in pressure transmi

An ultrasonic liquid ejecting unit comprises a piezoelectric transducer coated with a conductive film on each of its front and rear surfaces, a nozzle plate secured to the transducer to form a bimorph vibration system and a body having a liquid chamber defined by the nozzle plate in pressure transmitting relation with the liquid in the chamber. The nozzle plate is coated on each of its front and rear surfaces with a pattern of adjoining regions of cement-active and cement-inactive properties. The cement-active region on the front surface conforms to the rear surface of the transducer and the cement-active region of the rear surface conforms to a contact surface of the body. When fabricating the unit, a cementing material in liquid phase, such as molten solder, is applied to each surface of the nozzle plate to exclusively wet the cement-active regions prior to contacting the nozzle plate to the transducer and to the body.

대표청구항 ▼

An ultrasonic liquid ejecting unit comprising: a piezoelectric transducer having a pair of first and second conductive films coated on opposite sides thereof, and an opening at the center thereof; a body having a contact surface and a chamber behind said contact surface for holding liquid therein an

An ultrasonic liquid ejecting unit comprising: a piezoelectric transducer having a pair of first and second conductive films coated on opposite sides thereof, and an opening at the center thereof; a body having a contact surface and a chamber behind said contact surface for holding liquid therein and an intake port connected to said chamber for supplying liquid thereto from a liquid supply source; a metallic nozzle plate having a nozzle opening, first and second patterns of adjoining regions of cement-active and cement-inactive properties on opposite sides thereof, said cement-active region of the first pattern conforming to and secured to said second surface of said transducer by way of a layer of cementing material so that said nozzle opening is positioned within the opening of said transducer, said cement-active region of the second pattern conforming to and secured to said contact surface of said body by way of a layer of cementing material to define said chamber to thereby establish a pressure transmitting relationship with the liquid in said chamber.