banner.jpg 34 Rapid Multi-material 3D Printing with Projection Micro-Stereolithography using an Enclosed Printing Chamber Daehoon Han1, Jay Tobia1, Nicholas X. Fang2 and Howon Lee1 1Department of Mechanical and Aerospace Engineering, Rutgers University, New Brunswick NJ, USA 2Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge MA, USA ABSTRACT

Development of multi-material stereolithography techniques has enabled the creation of structures with geometric complexity and material heterogeneity. However, most of conventional methods suffer from long material exchange time and low material contrast due to cross-contamination. Here we report a rapid multi-material stereolithography technique using an enclosed printing chamber where material change is driven by a pump. This fast, high resolution, and high contrast multi-material 3D printing method can enable new multi-functional devices and structures in diverse areas.

Keywords: Additive manufacturing, Micro additive manufacturing, Micro fabrication.

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