Wasley, T, Li, J, Ta, D et al. (6 more authors) (2016) Additive Manufacturing of High Resolution Embedded Electronic Systems. In: Proceedings of the 27th Annual International Solid Freeform Fabrication Symposium – An Additive Manufacturing Conference. Solid Freeform Fabrication 2016 (SFF Symp 2016), 08-10 Aug 2016, Austin, Texas, USA. University of Texas at Austin , pp. 1838-1855.
Abstract
Additive Manufacturing (AM) processes can facilitate the rapid iterative product development of electronic devices by optimising their design and functionality. This has been achieved by combining two additive manufacturing processes with conventional surface mount assembly to generate high resolution embedded multilayer electronic circuits contained within a 3D printed polymer part. Bottom-up DLP Stereolithography and material dispensing of isotropic conductive adhesives have been interleaved to deposit microscale features on photopolymer substrates. The material dispensing process has demonstrated the high density deposition of conductors attaining track widths of 134µm and produced interconnects suitable for directly attaching bare silicon die straight to the substrate. Interconnects down to a diameter of 149µm at a pitch of 457µm have been realized. In addition, this research developed a novel method for producing high aspect ratio z-axis connections. These were simultaneously printed with the circuit and component interconnects by depositing through-layer pillars with a maximum aspect ratio of 3.81. Finally, a method to accurately embed the packaged circuit layer within the printed part has been employed using bottom-up stereolithography.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Keywords: | additive manufacturing; process integration; multilayer embedded electronics; DLP stereolithography; material dispensing; flip chip packaging |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Medical and Biological Engineering (iMBE) (Leeds) |
Funding Information: | Funder Grant number EPSRC EP/L017415/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 21 Nov 2016 11:45 |
Last Modified: | 08 Oct 2017 16:44 |
Published Version: | http://sffsymposium.engr.utexas.edu/TOC2016 |
Status: | Published |
Publisher: | University of Texas at Austin |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:107715 |