Manufacturing Technology Only Absorbs One Green Laser Pointer

This technique circumvents the diffraction limit problems faced by other additive manufacturing technologies. Compared with the general additive manufacturing technology, it only absorbs one green laser pointer photon. That is, the photosensitive material that undergoes the curing reaction is different. The photosensitive material used in this technology needs to absorb two photons at the same time in order to be cured (this was a trade secret). But two-photon lithography builds structures from the bottom up. Because the distance between the glass slide and the lens is typically less than 200 microns, the maximum size of the final shaped structure is limited. The researchers placed the photosensitive material directly on the lens and focused the green laser pointer through the photosensitive material. Thus, a structure with a height of several millimeters is manufactured.