Implementation of a shadow mask for direct writing in abrasive jet micro-machining

Nouhi, A.; Lari, M.R. Sookhak; Spelt, J.K.; Papini, M.

doi:10.1016/j.jmatprotec.2015.04.007

Cited by 35 publications

(15 citation statements)

References 17 publications

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“…The reason for the narrower channel when using the thicker mask is likely related to differences in the trajectories of ricocheting particles. As explained by Nouhi et al [17], when thicker masks are used, more particles tend to ricochet from the mask edge and strike the opposite side of the mask, rather than ricocheting onto the surface, as occurs with thinner masks. This leads to a lower erosion rate at the channel edges when thicker masks are used.…”

Section: Effect Of Multiple Rapidmask Layersmentioning

confidence: 95%

“…The erosion across a central portion of the channel is relatively constant; however, this does not apply to the edges where there are interactions between the particles and the edge of the mask. This causes a reduction in the erosive power as more particles ricochet from the mask [17]. On the other hand, in unmasked micromachining using AJM, erosive power is known to be non-uniform.…”

Section: Abrasive Jet Micromachiningmentioning

confidence: 99%

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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 and microfluidic device fabrication

Ahmadzadeh¹

2021

Preprint

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Soft lithography techniques has been used widely in the past decade to fabricate microfluidic chips used in biomedical applications. Abrasive jet machining (AJM) has been used to fabricate similar chips using particle erosion mechanisms. This thesis proposes a new technique using a UV light sensitive self-adhesive mask (RapidMask) and AJM to fabricate a three dimensional flow focusing microfluidic chip where the depth of the channel is allowed to vary along the channel length. A detailed characterization of the effect of curing parameters of a UV light curing self-adhesive mask on the resulting feature resolution is reported. Instead of relying on the manufacturer recommended curing parameters which were vaguely described for specific UV curing units, it was found that measured energy density could be used to quantify a recommended cure that is independent of the curing unit. The best achievable pattern on borosilicate glass using RM and AJM was found and reported along with the erosion rates of uncured, cured RM during AJM. A new methodology was introduced to use multiple layers of the RM in order to increase the achievable feature aspect ratio. The results of the RM curing and multiple layer investigation were then used to fabricate a three dimensional flow focusing chip with a varying depth at the focusing junction. The chip was then sealed and tested to demonstrate its capabilities and potential in healthcare and biomedical applications. To the best knowledge of the author, this thesis is the first to report using a double layer RM to fabricate a microfluidic chip using AJM.

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Section: Effect Of Multiple Rapidmask Layersmentioning

confidence: 95%

Section: Abrasive Jet Micromachiningmentioning

confidence: 99%

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

Ahmadzadeh¹

2021

Preprint

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“…There was an experimental comparison between shadow mask technology and clamped mask technology, The channels machined using the shadow mask were found to be approximately 10% wider than those machined using clamped masks up to an aspect ratio of approximately 0.5.with increasing nozzle standoff distance and mask thickness, decreasing mask standoff distance particle size leading to narrowest features with the least amount of frosting. [27]. Kumar Abhishek and Somashekhar S [30] made an attempt to overcome the conical shapes produced during machining operation on glass materials using the parameters feed rate, material removal, cylindricity, nozzle angle, in AJM.…”

Section: Fig3-sem Images Of U Type and Square Type Groovesmentioning

confidence: 99%

A Research Review on Advanced Approches in Abrasive Jet Machining

Prasad¹,

Ravindranath²,

Devakumar³

2016

IOSR

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In the advanced areas of space, missile and nuclear technologies, there arise a need for machining components to maintain exact sharp edges, high accuracy, and precisely sized components. In the present era of modern machining, these requirements can be achieved with the help of advanced machining process like Abrasive Jet Machining (AJM).This paper presents an extensive review of the current state of research and development on abrasive jet machining process.

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“…This experimentation mainly constitutes two theories one is elastic emission and other abrasive fluid theory, after experimentation they concluded that as compared to conventional polishing method its gives high precision workpiece with less time and cost. Nouhia et al (2015) introduced a shadow mask technology in place of clamped mask. This mask was applied by using of direct-writing device on borosilicate glass surface on cross two sets of arrangements in curved paths.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on modified air abrasive jet machining (MAAJM)

Prasad

Ravindranath²,

Devakumar

2020

Production & Manufacturing Research

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In the past few decades, sophisticated machining industries are rapidly improved to attain the required shape of part within specific time and also not affecting/disturbing material properties. Accuracy of machined components is very important in every industry and geometrical accuracy of hole is vital in case of subassemblies of components. In this perspective, the researchers/experts updated their machinery time to time. In machining process, the mainly affected parameters are environment and time of machining zone, so in this case to overcome these problems encountered it is necessary to consider design of experiments which is having a great use in machining zone. This paper attempts new approach to produce hole within measurements on glass material using modified air abrasive jet machining (MAAJM) setup. Experiments were conducted on nickel material to evaluate the taper in machining. This (MAAJM) experimental work compared to stationary work table process is proven more accurate.

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Implementation of a shadow mask for direct writing in abrasive jet micro-machining

Cited by 35 publications

References 17 publications

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

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

A Research Review on Advanced Approches in Abrasive Jet Machining

Experimental investigation on modified air abrasive jet machining (MAAJM)

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