scholarly journals Microfabricating high-aspect-ratio structures in polyurethane-methacrylate (PUMA) disposable microfluidic devices

Lab on a Chip ◽  
2009 ◽  
Vol 9 (13) ◽  
pp. 1951 ◽  
Author(s):  
Jason S. Kuo ◽  
Yongxi Zhao ◽  
Laiying Ng ◽  
Gloria S. Yen ◽  
Robert M. Lorenz ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Microfluidic Devices

scholarly journals Using Stereolithographic Printing to Manufacture Monolithic Microfluidic Devices with an Extremely High Aspect Ratio

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3750
Author(s):  
Pin-Chuan Chen ◽  
Po-Tsang Chen ◽  
Tuan Ngoc Anh Vo
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Dimensional Accuracy ◽  
Microfluidic Devices ◽  
Oxygen Inhibition ◽  
Dimensional Precision ◽  
Inner Surface ◽  
Inhibition Process ◽  
High Degree

Stereolithographic printing (SL) is widely used to create mini/microfluidic devices; however, the formation of microchannels smaller than 500 μm with good inner surface quality is still challenging due to the printing resolution of current commercial printers and the z-overcure error and scalloping phenomena. In the current study, we used SL printing to create microchannels with the aim of achieving a high degree of dimensional precision and a high-quality microchannel inner surface. Extensive experiments were performed and our results revealed the following: (1) the SL printing of microchannels can be implemented in three steps including channel layer printing, an oxygen inhibition process, and roof layer printing; (2) printing thickness should be reduced to minimize the scalloping phenomenon, which significantly improves dimensional accuracy and the quality of inner microchannel surfaces; (3) the inclusion of an oxygen inhibition step is a critical and efficient approach to suppressing the z-overcure error in order to eliminate the formation of in-channel obstructions; (4) microchannels with an extremely high aspect ratio of 40:1 (4000 μm in height and 100 μm in width) can be successfully manufactured within one hour by following the three-step printing process.

Fabrication of high aspect ratio microfluidic devices using direct fs ablation

2008 ◽  
Author(s):  
G. Smith ◽  
D. Karnakis ◽  
M. Knowles ◽  
A. Ferguson ◽  
I. Bennion ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Microfluidic Devices
Sign in / Sign up

Export Citation Format

Share Document