Advanced DLP 3D Printer for Microfluidic Device Fabrication

Overview

The ProFluidics 285D is a high‐precision, bench‐top DLP (Digital Light Processing) 3D printer engineered specifically for microfluidics. It combines a 4 million-pixel projector with optimized photopolymer resins to produce ultra-smooth, high-resolution microchannels and master molds without the need for a cleanroom. Ideal for rapid prototyping of PDMS molds, fully enclosed or open microfluidic devices, and biocompatible structures.

Key Specifications

1. Build Volume: 110 × 62 × 120 mm (X × Y × Z)
2. Native XY Pixel Resolution: 40 µm
3. Dynamic XY Pixel Resolution: 28.5 µm (pixel shifting)
4. Z-Axis (Layer) Resolution: 5 µm – 500 µm (adjustable)
5. Light Source Wavelength: 385 nm (UV LED / DLP engine)
6. Projector: 4 million (2,560 × 1,600) pixel DLP micromirror array
7. Minimum Feature Size:
8. Open Channels (XY): down to 50 µm
9. Enclosed (Embedded) Channels: down to 80 µm
10. Surface Roughness (Ra): ~0.18 µm using specialized resin
11. Printer Footprint (W × D × H): 50 × 57 × 59 cm
12. Weight: ~56 kg

Performance Highlights

1. Ultra-Smooth Surfaces: Dynamic pixel shifting minimizes stair-stepping and checkerboarding, yielding smoother channel walls and more reliable fluid flow.
2. Rapid Prototyping: Full‐bed print of a PDMS master mold (e.g., 50 × 50 mm footprint) in under one hour, enabling same-day iterative design and testing.
3. No Cleanroom Required: Prints directly at bench level; resins and hardware optimized for microfluidic geometries eliminate the need for photolithography.
4. Biocompatible & Transparent Materials: Specialized Cyto-Clear™ resin allows for cell-friendly scaffolds and optically transparent devices suitable for microscopy.
5. Master Mold Fabrication: Print masters with feature heights up to 5 mm and channel widths as fine as 50 µm for PDMS casting, bypassing traditional SU-8 processes.
6. Integrated Touchscreen Interface: 7″ color touchscreen with on-printer slicing, print preview, resin temperature readout, and real-time print statistics.

Common Applications

1. PDMS Master Molds: Create molds with precise channel geometries for soft lithography.
2. Encapsulated Microfluidic Devices: Produce monolithic devices with fully embedded channel networks (e.g., “microfluidic chips” with inlet/outlet ports).
3. Bioscaffold & Organ-on-a-Chip Structures: Fabricate biocompatible 3D scaffolds (up to 1.4 mm channel height) for cell culture and nutrient perfusion studies.
4. Rapid Iteration of Microfluidic Layouts: Test variations of droplet generators, gradient mixers, particle sorters, and other complex architectures in hours rather than days.
5. Optical‐Grade Channels: Transparent channel walls for real-time imaging of flow, particles, or cells under microscope.