Procedural Design of Imprint Rolls for Fluid Pathway Fabrication

Vijayaraghavan, Athulan; Dornfeld, David

doi:10.1115/detc2007-35187

Cited by 2 publications

(4 citation statements)

References 14 publications

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“…Figure 5 shows an example of a pattern being represented with this set of tiles. We have addressed some of the advantages of this tile-based approach in an earlier work [Vijayaraghavan and Dornfeld 2007]. Imprint rolls for a microfluidic device design are modeled with the same tiles as the device.…”

Section: Tile-based Modelingmentioning

confidence: 99%

Subdivision surfaces for procedural design of imprint rolls

Vijayaraghavan

Dornfeld

2008

Proceedings of the 2008 ACM Symposium on Solid and Physical Modeling

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We discuss the use of subdivision surfaces in the procedural design of imprint rolls for use in the roller imprinting process. Roller imprinting is being developed for the fabrication of microfluidic devices in polymer substrates. Imprint rolls are modeled using Catmull-Clark subdivision surfaces, and are procedurally designed based on feedback from finite-element simulations of the imprinting process. Microfluidic devices exhibit repeating patterns, and can be modeled using a small set of unique entities (or tiles). Imprint rolls are also modeled as a sum of tiles, and rolls are designed by studying the imprinting behavior of clusters of tiles corresponding to the repeating patterns seen in the device. This approach reduces the roll complexity and analysis time. The rolls need to be described in a sufficiently flexible format for the tile-based analysis to be effective. Conventional model representations are too cumbersome for piecewise iterative refinement as they require the manipulation of a large number of variables to modify surface features while preserving continuity. Subdivision surfaces, on the other hand, are naturally continuous and can be modified by manipulating a small number of variables. The ability to apply rule-based, arbitrary refinement on subdivision surfaces makes them especially suitable. The procedural modeling methodology and the subdivision design representation enable the integrated design, analysis, and manufacturing of imprint rolls, and has proven effective in decreasing the design-to-manufacture time of novel microfluidic technology.

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Section: Tile-based Modelingmentioning

confidence: 99%

Subdivision surfaces for procedural design of imprint rolls

Vijayaraghavan

Dornfeld

2008

Proceedings of the 2008 ACM Symposium on Solid and Physical Modeling

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“…This roll was designed based on the procedural approach discussed in Vijayaraghavan and Dornfeld [1]. A solid model of the roll is shown in Figure 11.…”

Section: Manufacturing Imprint Rollsmentioning

confidence: 99%

“…Past work by the authors have focussed on design of the imprint rolls [1][2][3]. The feature complexity seen in microfluidic devices makes it tedious to manually design imprint rolls.…”

Section: Roller Imprinting For Microfluidic Devicesmentioning

confidence: 99%

“…In this process, a cylindrical roll with raised features on its surface creates imprints by rolling over a fixed workpiece substrate and mechanically deforming it (please see Figure 1). Past research by the authors has focussed on developing design methodologies and tools for modeling the imprint rolls [1,2], and on using computational tools for designing the imprint roll features such that they create precise imprints [3]. Imprint rolls are manufactured using micro-machining technology.…”

Section: Introductionmentioning

confidence: 99%

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Design and Fabrication of a Roller Imprinting Device for Microfluidic Device Manufacturing

Vijayaraghavan

Jayanathan

Helu

et al. 2008

ASME 2008 International Manufacturing Science and Engineering Conference, Volume 2

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Microfluidic devices are gaining popularity in a variety of applications, ranging from molecular biology to bio-defense. However, the widespread adoption of this technology is constrained by the lack of efficient and cost-effective manufacturing processes. This paper focuses on the roller imprinting process, which is being developed to rapidly and inexpensively fabricate micro-fluidic devices. In this process, a cylindrical roll with raised features on its surface creates imprints by rolling over a fixed workpiece substrate and mechanically deforming it. Roller imprinting aims to replace processes that were developed for laboratory scale prototyping which tend to not be scalable and have high equipment requirements and overheads. We discuss the limitations of PDMS soft lithography in large-scale manufacture of microfluidic devices. We also discuss the design, fabrication, and testing of a simple roller imprinting device. This imprinter has been developed based on the principles of precision machine design and is implemented using a three-axis machine tool for actuation and position measurement. A framework for the micromachining of precision imprint rolls is also presented.

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Procedural Design of Imprint Rolls for Fluid Pathway Fabrication

Abstract: This paper discusses a novel method for designing imprint rolls for the fabrication of fluid pathways. Roller imprint processes have applications in diverse areas

Cited by 2 publications

References 14 publications

Subdivision surfaces for procedural design of imprint rolls

Subdivision surfaces for procedural design of imprint rolls

Design and Fabrication of a Roller Imprinting Device for Microfluidic Device Manufacturing

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