Title :
On-chip integration of eight directional droplet ejectors for inking a spot with eight droplets without ejector movement
Author :
Choe, Youngki ; Wang, Lingtao ; Kim, Eun Sok
Author_Institution :
Dept. of EE-Electrophys., Univ. of Southern California, Los Angeles, CA, USA
Abstract :
This paper describes an on-chip acoustic ejector array consisting of eight directional droplet ejectors that was designed to ink a spot with eight different droplets without having to move the ejectors. Each of the eight directional ejectors consistently ejects uniform droplets in diameter of 51 μm with a directional angle about 17° (with respect to the normal direction of the liquid surface). When a glass substrate was placed 8 mm away from the ejector array chip, all the ejected droplets from the 8 ejectors were placed within 399 × 1080 μm2 area. If we exclude two ejectors which had bad alignment with the others, all the 6 droplets were placed within 238 × 380 μm2 area.
Keywords :
acoustic transducer arrays; drops; microchannel flow; microfabrication; directional droplet ejector; glass substrate; on-chip acoustic ejector array; silicon microfluidic channel; spot inking; Acoustics; Arrays; Glass; Lenses; Resonant frequency; Silicon; Substrates; Acoustic Ejector; Droplet Ejector; Ejector Array; Fresnel Lens; PZT Acoustic Ejector;
Conference_Titel :
Solid-State Sensors, Actuators and Microsystems Conference (TRANSDUCERS), 2011 16th International
Conference_Location :
Beijing
Print_ISBN :
978-1-4577-0157-3
DOI :
10.1109/TRANSDUCERS.2011.5969437