2008
DOI: 10.1007/s00542-007-0553-4
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Experimental characterization of transcription properties of microchannel geometry fabricated by injection molding based on Taguchi method

Abstract: Microchannel is a fundamental structure in various microfluidic systems. Precise reproduction of microchannel is required to achieve reliable efficiency of microfluidic systems. In this paper, we present the parametric sensitivity study of the replication of a cross microchannel by injection molding with a nickel mold insert which was fabricated by the UV-LIGA process. The effects of processing parameters of the injection molding on the transcription properties of cross-sectional geometry of the microchannel w… Show more

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Cited by 20 publications
(9 citation statements)
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“…One generally concerned about the transcriptability issue for filling microstructures. The rounded corner of channel geometry because of poor transcriptability was reported in [13], but the transcriptability is not a critical issue with regard to the fluid flow in the microchannel. On the other hand, the transcriptability issue for the pillar and the rib structures are rather significant.…”
Section: Introductionmentioning
confidence: 99%
“…One generally concerned about the transcriptability issue for filling microstructures. The rounded corner of channel geometry because of poor transcriptability was reported in [13], but the transcriptability is not a critical issue with regard to the fluid flow in the microchannel. On the other hand, the transcriptability issue for the pillar and the rib structures are rather significant.…”
Section: Introductionmentioning
confidence: 99%
“…These phenomena can be explained by the nature of the injection molding dealing with the molten polymer. The cooling of the molten PC rapidly takes place through the walls of very thin and small cavities of microlenses and, therefore, solidified layers could be formed and prevent the advancement of the melt front into the cavities before filling completely [12–14]. As the melt front advances far from the gate, the molten polymer hardly fills the cavity due to the rapid cooling of the molten polymer.…”
Section: Resultsmentioning
confidence: 99%
“…Specifically, the surface quality of fingerlike convex microstructures was investigated using various resin materials [9]. In a different research, cross microchannel was studied in view of effects of parameters on replication properties [10]. However, a systematic study on the effects of processing parameters and geometric factors on the replication quality was not included in their work.…”
Section: Introductionmentioning
confidence: 99%
“…Microinjection molding process requires the development of mold inserts with cleanroom or ultraprecision micromachining process. As a conventional fabrication method, cleanroom‐based process has been utilized to make mold inserts for microinjection molding [10–13]. However, this method includes a series of process steps such as thin film coating, micropatterning, and other lithographic procedures, leading to high cost, long machining cycle, and lack of flexibility.…”
Section: Introductionmentioning
confidence: 99%