4-bit 디지털 미소분사기의 설계변수와 토출성능간의 영향분석에 관한 실험적 연구Design Parameters and Experimental Performance Evaluation of 4-bit Digital Multi-heater Microinjector

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We present the design, fabrication and experimental results of 4-bit digital microinjectors, whose ejected droplet volumes are adjusted by the digital operation of a 4-bit microheater array. We design the reference microinjectors as well as its comparative test structures. In the fabrication process, we use a five-mask micromachining process and the total chip size of the fabricated microinjector is We measure the ejected droplet volumes and velocities, which are adjusted from respectively, depending on the 15 possible combinations of 4-bit microheater array. We also experimentally characterize the effect of geometric variation including the microheater size, inter-microheater gap, microchannel width and sequential operation of microheater array on the ejected droplet volume and velocity. Among these parameters, we find that the microheater size is the most dominant parameter affected to the ejected droplet volumes and velocities. Thus, the present microinjector has a potential for application to the high-resolution inkjet printers with multiple gray levels or high-precision fluid injectors with variable volume control.
Publisher
대한기계학회
Issue Date
2005-03
Language
Korean
Citation

대한기계학회논문집 A, v.29, no.3, pp.418 - 424

ISSN
1226-4873
URI
http://hdl.handle.net/10203/92010
Appears in Collection
BiS-Journal Papers(저널논문)
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