Up till now fabrication of small features was quite difficult and expensive too but now researchers have come up with a nanotechnology fabrication method under which production of 3 D polymer line structures has become easier with two new photon absorbing molecules responsive to laser light at shorter wavelengths. Fabrication was quite expensive due to the requirement of costly electronic beam or UV lithography equipment but now researchers have figured out a technique known as 3D multi-photon lithography which leads to simplification of the overall process and brings down the costs. This technique could offer competition to the existing processes.
Under this technique a laser beam is canned across a substrate coated with polymer resin having a unique dye which leads to creation of the desired hardened polymer structure and since the absorption rate of two photon comes down drastically therefore just molecules at the focal point get light for absorption of two photons.
Via nanowerk
