TY - GEN
T1 - Acoustic ejector with novel lens employing air-reflectors
AU - Lee, Chuang Yuan
AU - Yu, Hongyu
AU - Kim, Eun Sok
PY - 2006
Y1 - 2006
N2 - This paper describes a novel droplet ejector with an acoustic lens employing air-reflectors. The lens focuses the acoustic beams at the liquid surface, and facilitates uniform and consistent droplet ejections. This acoustic ejector requires no nozzle, nor heat for actuation, but uses a novel lens. When excited with RF pulses (7 μs pulsewidth) of 18 MHz (corresponding to the fundamental thickness-mode resonant frequency), the ejector ejects uniform droplets of 70|μm in diameter at a rate up to 10 kHz. The ejector is integrated with reservoirs and channels on a single chip, and is shown to produce continuous and stable ejections without any liquid refilling or frequency tuning.
AB - This paper describes a novel droplet ejector with an acoustic lens employing air-reflectors. The lens focuses the acoustic beams at the liquid surface, and facilitates uniform and consistent droplet ejections. This acoustic ejector requires no nozzle, nor heat for actuation, but uses a novel lens. When excited with RF pulses (7 μs pulsewidth) of 18 MHz (corresponding to the fundamental thickness-mode resonant frequency), the ejector ejects uniform droplets of 70|μm in diameter at a rate up to 10 kHz. The ejector is integrated with reservoirs and channels on a single chip, and is shown to produce continuous and stable ejections without any liquid refilling or frequency tuning.
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M3 - Conference contribution
AN - SCOPUS:33750135140
SN - 0780394755
SN - 9780780394759
T3 - Proceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
SP - 170
EP - 173
BT - 19th IEEE International Conference on Micro Electro Mechanical Systems
T2 - 19th IEEE International Conference on Micro Electro Mechanical Systems
Y2 - 22 January 2006 through 26 January 2006
ER -