Effect of curing parameters and configuration on the efficacy of ultraviolet light curing self-adhesive masks used for abrasive jet micro-machining

Ahmadzadeh, Farbod; Tsai, Scott S. H.; Papini, M.

doi:10.1016/j.precisioneng.2017.03.005

Cited by 8 publications

(6 citation statements)

References 22 publications

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“…The preciseness and resolution of the mask are critical to the quality of the lithography. As shown in Figure 2 A, the mask printed using the office laser printer is not homogeneous and the edges of the pattern are coarse [ 27 ]. This is due to the printing method in which microdots of electrically-charged powder are dispensed and spaced apart to form the image on the film.…”

Section: Resultsmentioning

confidence: 99%

Low-Cost, Accessible Fabrication Methods for Microfluidics Research in Low-Resource Settings

Nguyen

Thach

Roy³

et al. 2018

Micromachines

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Microfluidics are expected to revolutionize the healthcare industry especially in developing countries since it would bring portable, easy-to-use, self-contained diagnostic devices to places with limited access to healthcare. To date, however, microfluidics has not yet been able to live up to these expectations. One non-negligible factor can be attributed to inaccessible prototyping methods for researchers in low-resource settings who are unable to afford expensive equipment and/or obtain critical reagents and, therefore, unable to engage and contribute to microfluidics research. In this paper, we present methods to create microfluidic devices that reduce initial costs from hundreds of thousands of dollars to about $6000 by using readily accessible consumables and inexpensive equipment. By including the scientific community most embedded and aware of the requirements of healthcare in developing countries, microfluidics will be able to increase its reach in the research community and be better informed to provide relevant solutions to global healthcare challenges.

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Section: Resultsmentioning

confidence: 99%

Low-Cost, Accessible Fabrication Methods for Microfluidics Research in Low-Resource Settings

Nguyen

Thach

Roy³

et al. 2018

Micromachines

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“…AJM has been used to make a number of microfluidic devices. For example, Solignac et al [3] used AJM and a metal mask with 100 µm wide openings to fabricate 30 µm deep microfluidic channels to form a capillary electrophoresis chip [4]. The AJM method, however, has some drawbacks.…”

Section: The Abrasive Jet Micro-machining Methodsmentioning

confidence: 99%

The effects of blast lag in abrasive jet machined micro-channel intersections

Shafagh

Papini

2020

Precision Engineering

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“…For example, Ahmadzadeh et al [18] investigated RM for making microfluidic channels on flat targets. However, applying RM to the rod was challenging and time-consuming due to positioning difficulties and the presence of seams between the edges of the film in various wrapping configurations.…”

Section: Spring-masked Helical Channels On Rodsmentioning

confidence: 99%

Abrasive air jet micro-machining of highly curved surfaces

Nouhi¹

2021

Preprint

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In the abrasive jet micro-machining (AJM) process, a jet of high-speed particles is directed through a micro-nozzle which is used to erode a wide variety of materials. The micro-machining of small curved devices made of brittle and ductile materials is required in optical and biomedical equipment. This dissertation aims at fabricating axial grooves and helical micro-channels in stationary and rotating curved targets, respectively, using AJM. In addition, a model is proposed to predict the shape of machined channel profiles in glass and PMMA rods. Since the air driven jet is divergent, the edges of the desired features are usually defined using a mask which is attached to the surface of the target material. This thesis presents an alternate technique using shadow masks that can be moved over the surface. It is demonstrated that this apparatus can be used to direct write features on the surface. This dissertation proposes a modification to the existing surface evolution models for predicting the channel profiles machined on highly curved and tilted surfaces. It is shown that considering the change in local nozzle standoff and the divergence angle of each particle trajectory in the jet plume results in more accurate predictions. Computational fluid dynamics (CFD) modeling showed that the jet footprint difference on the flat and curved surfaces was not due solely to the expected conical divergence in the jet, but also due to differences in the erosion caused by secondary impacts of rebounding particles. This observation has important implications for the surface profile modeling of curved surfaces. Finally, a model for the prediction of the volumetric removal of material during the machining of rotating and translating PMMA and glass rods is presented. In addition, a new experimental procedure is proposed for machining helical micro-channels in glass and PMMA rods using a cylindrical steel spring as a mask. This method of machining provides a convenient means of fabricating helical micro-channels with different aspect ratios and radii of curvature means of fabricating helical micro-channels with different aspect ratios and radii of curvature. Such helical micro-channels may have applications in inertial microfluidic devices where they can be used to aid liquid mixing and the separation of particles from a flow.

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Effect of curing parameters and configuration on the efficacy of ultraviolet light curing self-adhesive masks used for abrasive jet micro-machining

Cited by 8 publications

References 22 publications

Low-Cost, Accessible Fabrication Methods for Microfluidics Research in Low-Resource Settings

Low-Cost, Accessible Fabrication Methods for Microfluidics Research in Low-Resource Settings

The effects of blast lag in abrasive jet machined micro-channel intersections

Abrasive air jet micro-machining of highly curved surfaces

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