Tolerance variation and passive alignment in modular, polymer microfluidic devices
Document Type
Conference Proceeding
Publication Date
1-1-2006
Abstract
Simulations and experiments to assess the predictability of dimensional and locational tolerances of passive alignment structures on injection molded microfluidic components were performed. A center-gated disk with microscale assembly features, to aid metrology, was reproduced using injection molding. The feature dimensions were 100, 200, 300, and 400 urn. Dimensions of the features were measured using optical profilometery and optical microscopy. Simulations using a commercial package overestimated replication fidelity. Mold surface temperatures and injection speeds significantly affected the replication fidelity as the ratio of surface area to volume increased. The location of better replication fidelity, at each mold surface temperature, moved from the edge of the mold cavity to the injection point as the mold surface temperature increased from 100°C to 150°C. Therefore, process parameters and the design of a mold have to be considered for successful replication of the features. Copyright © 2006 by ASME.
Publication Source (Journal or Book title)
American Society of Mechanical Engineers, Micro-Electro Mechanical Systems Division, (Publications) MEMS
Recommended Citation
You, B., Park, D., Mock, C., Caceres, W., Nikitopoulos, D., Soper, S., & Murphy, M. (2006). Tolerance variation and passive alignment in modular, polymer microfluidic devices. American Society of Mechanical Engineers, Micro-Electro Mechanical Systems Division, (Publications) MEMS https://doi.org/10.1115/IMECE2006-15258