Submicron scale stereolithography using HD-DVD optical pickup unit

It is challenging for stereolithography systems to print submicron features without two-photon lasers. For the first time, we implement an HD-DVD optical pickup unit (OPU) for building a customized stereolithography 3D printer. The OPU equips a 405 nm single-photon laser and an objective lens with a numerical aperture of 0.65. This has a focal laser spot diameter of 430 nm (1/e2) and can thereby, achieve submicron scale features photopolymerization. Moreover, the OPU embeds astigmatic optical path and voice coil motor which can be used for closed-loop printing alignment and this increases printing stability significantly. The OPU 3D printing system integrates an XYZ linear stage, providing nanoscale positioning resolution and macroscale printing area (c.a. 50 X 50 X 25 mm). A commercial photo-resin is utilized for the assessment of the system performance. The OPU printer crosslinks structures ranging from tens of microns down to submicron scale by tuning the printing parameters (laser intensity, printing speed, and photo-resin thickness). After optimization of the system, the OPU printer achieved the highest printing resolution of 210 nm which is beyond conventional stereolithography systems. Furthermore, several microstructures have been printed for verifying multiple layer printing performance. In conclusion, the mass-produced, low-cost and compact size OPU can not only dramatically simplify the stereolithography 3D printer design, but also achieve submicron printing performance.

[1]  E. Hwu,et al.  Operation of astigmatic-detection atomic force microscopy in liquid environments. , 2013, The Review of scientific instruments.

[2]  A. Misra,et al.  Additive Manufacturing of Aerospace Propulsion Components , 2015 .

[3]  Paulo Jorge Da Silva bartolo,et al.  Stereolithography: Materials, Processes and Applications , 2011 .

[4]  S. Kawata,et al.  Three-dimensional microfabrication with two-photon-absorbed photopolymerization. , 1997, Optics letters.

[5]  Anja Boisen,et al.  Hacking CD/DVD/Blu-ray for Biosensing , 2018, ACS sensors.

[6]  K. Ikuta,et al.  Submicron stereolithography for the production of freely movable mechanisms by using single-photon polymerization , 2002 .

[7]  Albert van den Berg,et al.  A low-cost 2D fluorescence detection system for μm sized beads on-chip. , 2012, Lab on a chip.

[8]  N. Faller,et al.  A process for producing a three-dimensional structure , 2010 .

[9]  Paul F. Jacobs,et al.  Rapid Prototyping & Manufacturing: Fundamentals of Stereolithography , 1992 .

[10]  H. Danzebrink,et al.  A hybrid scanning probe microscope (SPM) module based on a DVD optical head , 2009 .

[11]  Cheng Sun,et al.  Micro-stereolithography of polymeric and ceramic microstructures , 1999 .

[12]  Jonathan Goole,et al.  3D printing in pharmaceutics: A new tool for designing customized drug delivery systems. , 2016, International journal of pharmaceutics.

[13]  R. Mülhaupt,et al.  Polymers for 3D Printing and Customized Additive Manufacturing , 2017, Chemical reviews.

[14]  Omar Ahmed Mohamed,et al.  Optimization of fused deposition modeling process parameters: a review of current research and future prospects , 2015, Advances in Manufacturing.

[15]  Iskander S. Akhatov,et al.  A Review on Aerosol-Based Direct-Write and Its Applications for Microelectronics , 2012 .

[16]  Christopher B. Williams,et al.  Multiple-Material Topology Optimization of Compliant Mechanisms Created Via PolyJet Three-Dimensional Printing , 2014 .

[17]  Hermann Seitz,et al.  A review on 3D micro-additive manufacturing technologies , 2012, The International Journal of Advanced Manufacturing Technology.

[18]  Ilhan A. Aksay,et al.  Cure depth in photopolymerization: Experiments and theory , 2001 .

[19]  K. Leong,et al.  Scaffold development using selective laser sintering of polyetheretherketone-hydroxyapatite biocomposite blends. , 2003, Biomaterials.

[20]  Joseph M DeSimone,et al.  Layerless fabrication with continuous liquid interface production , 2016, Proceedings of the National Academy of Sciences.

[21]  Martina Werner,et al.  New disc-based technologies for diagnostic and research applications. , 2002, Psychiatric genetics.

[22]  High resolution, low cost laser lithography using a Blu-ray optical head assembly , 2012 .

[23]  N. Fang,et al.  Photopolymer formulation to minimize feature size, surface roughness, and stair-stepping in digital light processing-based three-dimensional printing , 2018, Additive Manufacturing.