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Micro Fluidic Channel Machining on Fused Silica Glass Using Powder Blasting
Department of Mechanical Engineering, University of Incheon, Incheon 402-749, Korea
Division of Mechanical Engineering, Inha University, Incheon 402-751, Korea
* Author to whom correspondence should be addressed.
Received: 14 January 2008; Accepted: 29 January 2008 / Published: 6 February 2008
Abstract: In this study, micro fluid channels are machined on fused silica glass via powder blasting, a mechanical etching process, and the machining characteristics of the channels are experimentally evaluated. In the process, material removal is performed by the collision of micro abrasives injected by highly compressed air on to the target surface. This approach can be characterized as an integration of brittle mode machining based on micro crack propagation. Fused silica glass, a high purity synthetic amorphous silicon dioxide, is selected as a workpiece material. It has a very low thermal expansion coefficient and excellent optical qualities and exceptional transmittance over a wide spectral range, especially in the ultraviolet range. The powder blasting process parameters affecting the machined results are injection pressure, abrasive particle size and density, stand-off distance, number of nozzle scanning, and shape/size of the required patterns. In this study, the influence of the number of nozzle scanning, abrasive particle size, and pattern size on the formation of micro channels is investigated. Machined shapes and surface roughness are measured using a 3-dimensional vision profiler and the results are discussed.
Keywords: Micro powder blasting; Fused silica glass; Micro Fluidic channel; Fuel cell; Lab-on-a- chip; Bio sensor
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Cite This Article
MDPI and ACS Style
Jang, H.-S.; Cho, M.-W.; Park, D.-S. Micro Fluidic Channel Machining on Fused Silica Glass Using Powder Blasting. Sensors 2008, 8, 700-710.
Jang H-S, Cho M-W, Park D-S. Micro Fluidic Channel Machining on Fused Silica Glass Using Powder Blasting. Sensors. 2008; 8(2):700-710.
Jang, Ho-Su; Cho, Myeong-Woo; Park, Dong-Sam. 2008. "Micro Fluidic Channel Machining on Fused Silica Glass Using Powder Blasting." Sensors 8, no. 2: 700-710.