Semiconductors are 3D printed with molecular glue by researchers, as reported by


Over the years, 3D printing has become an increasingly popular manufacturing method across various industries. From niche to mainstream, its efficacy has been proven time and again. However, one significant challenge has hindered the 3D printing of semiconductors – the strength of bonds between layers of printed materials.

Conventionally, polymer binders have been used in the 3D printing process, but they often impede the optimal performance of the final product. In light of this, researchers at Tsinghua University have introduced a groundbreaking technique called “3D Pin”. This innovative method eliminates the need for polymer binders and instead utilizes semiconductor nanocrystals in a special colloidal ink.

The brilliance of 3D Pin lies in the inclusion of a molecular adhesive in the ink. When activated by a laser, this adhesive solidifies the bonds between the nanocrystals, resulting in robust 3D configurations. The precision of 3D Pin is truly remarkable, making it particularly suitable for printing quantum dots – tiny entities that play a crucial role in LED TVs, solar panels, and medical tools.

To showcase the capabilities of this new technology, the research team successfully 3D printed a luminous dragon-shaped pixel array using red and blue semiconductor crystals. The versatility of the ink formulation extends beyond semiconductors, as it can also produce a range of metals and semiconductor oxides. Unlike traditional integrated circuit methodologies, which are usually planar, 3D Pin directly creates three-dimensional structures.

It’s important to note that 3D Pin is not intended to replace current integrated circuit production methods. Instead, it aims to enhance them, particularly for devices that require 3D structures. This breakthrough in 3D printing technology opens up new possibilities for the manufacturing industry and offers exciting prospects for the future.

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Original source


“Why did the 3D printer go to therapy? Because it had too many layers of unresolved issues!”

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