| 摘要 |
The present invention provides an ultrasonic resonant cavity droplet ejector with localized excitation and a method for making the same. In a resonant cavity (40) with an ultrasonic transducer (20) acting as one of the cavity walls, the energy input from the transducer coupled with the gain of the resonant cavity causes a droplet to be ejected from a nozzle (50) in the cavity wall. In addition, a refill channel (30) can be introduced such that the cavity can be refilled without affecting cavity gain. Arrays of such locally excitable ejector cavities are useful in numerous applications, including, among others, ink-jet printing, DNA chip printing, and fuel injectors. |
