Geometric and Fature Size Design Effect on Vat Photopolymerization Micro Additively Manufactured Surface Deatures

A. Davoudinejad, L. C. Díaz Péreza, D. Quagliotti, David B. Pedersen, José A. Albajez Garcíaa, José A. Yagüe-Fabra, G. Tosello

    Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearchpeer-review


    Additive Manufactuing (AM) is a group of processes that are characterized by manufacturing a 3D model by adding material in layers. AM technologies allow fabricating directly from a 3D CAD model, without the need of process planning.
    Latest advances in AM have been focused in improving its accuracy, introducing AM in the micro manufacturing area (μAM) [1]. Inside AM, the Vat Photopolymerization (VP) methods are characterized by curing or hardening a liquid photopolymer, layer by layer, by means of an Ultraviolet (UV) light. Depending on the precision and resolution with which they project the UV light they can be applied in normal-size manufacturing as well as in micro-manufacturing. Specifically, when the layer is cured by mask projection of the UV light, the technology is called Digital Light Processing. In contrast to other VP methods, like Stereolithography, that solidify the resin in a point-by-point style, DLP cures a layer of resin at a time in one projection.
    In order to expand the applications for AM it is significant to achieve predictable and repeatable shapes of the features, i.e. how accurate the AM machine has the ability to print different feature geometries. For example, the dimensional and geometrical accuracy for fused deposition modeling, laser sintering and laser melting methods have been evaluated in previous studies [2].
    At the Technical University of Denmark (DTU), a DLP proprietary machine has been developed, built and validated [3]. This machine is able to print micro-scale features. This study analyzes the capability of this DLP machine in terms of geometry and smallest printing feature size when manufacturing micro-features with different geometries, while keeping the machine settings constant.
    Original languageEnglish
    Title of host publicationProceedings of the Joint Special Interest Group meeting: Additive Manufacturing
    PublisherThe European Society for Precision Engineering and Nanotechnology
    Publication date2018
    Publication statusPublished - 2018
    Event2018 ASPE and euspen Summer Topical Meeting: Advancing Precision in Additive Manufacturing - Lawrence Berkeley National Laboratory, Berkeley, United States
    Duration: 22 Jul 201825 Jul 2018


    Conference2018 ASPE and euspen Summer Topical Meeting
    LocationLawrence Berkeley National Laboratory
    Country/TerritoryUnited States
    OtherJoint Special Interest Group meeting: Additive Manufacturing


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