In-Vision Aids Revolutionary Sub-Micron 3D-Printing Development

Demand for Devices Creates Production Hurdles

High-performance optical devices are everywhere: from the average smartphone camera to augmented reality and virtual reality equipment, we’ve become accustomed to and demand exceptional quality imaging capabilities in increasingly smaller form factors. The problem is, producing these precision nanostructures typically requires a multi-step, layered 2D lithography process that requires multiple machines in a cleanroom facility, which makes it costly and hinders scalability.

Aiming to accelerate production and lower the cost, Das Gupta is working with In-Vision and J Group Robotics to build the first large format, sub-micron resolution 3D printer to produce exceptional quality optical devices faster and more economically than current 3D-printing technology allows. By eliminating the clean room and simplifying the process into one machine rather than 10, Das Gupta and his team are opening the doors to much greater production scale and new and broader applications.

In-Vision Light Engine Delivers Sub-Micron Resolution

Where most 3D DLP projectors are limited to one-to-two-micron resolution, Das Gupta’s work requires something much smaller, in the sub-micron range. To achieve this exceptional precision and scaled down image, In-Vision is supplying a projector, based on a DLP9000-Chipset with a newly designed optical path to achieve the sub-micron resolution at a wavelength of 405 nanometers.

With funding from the Indian Ministry of Electronics & Information, Das Gupta and In-Vision have partnered with J Group Robotics to collaborate and build the printer. The group meets frequently to collaborate on technical challenges and align on design and specifications for the printer, with an anticipated completion date of December 2023. Das Gupta says he expects the first optical component to be produced in Spring 2024.

Solving the Supply Chain Challenge

In addition to producing miniaturised photonic devices for AR/VR headsets, SLR cameras and smartphones, this sub-micron capability has broader applications for micro lenses in several other exciting areas. For example, the technology can be used to produce hydrogels and biopolymers for use in contact lenses, biosensors for detecting COVID-19 and other pathogens with a very low concentration of material through spectral analysis, and other applications in the semiconductor industry.

“3D-printing has taken over many other manufacturing processes, the only thing left is printing in submicron resolution,” Das Gupta said. “This technique has the potential to reduce the cost and drive drastic change in the semiconductor industry by eliminating the clean room requirement and making production much faster.”

In addition, Das Gupta says, “It also reduces the carbon footprint of the entire production process and could dramatically improve supply chain resiliency, allowing companies to produce and procure chips much closer to home.”