Fabrication of Microstructures Using PMMA by Rolling Process

摘要

This paper studies patterns for large scale production of microstructures, using the rolling microstamping process with heated substrate. Its working principle is a roll with microgrooves that spins over the heated substrate. The microdeformations will be generated by the heat and pressure undergone by the polymer, in other words, microimpressions, thus obtaining microlenses or microstructures. The materials used for the mold and replica are aluminum and polymethylmethacrylate (PMMA), respectively. Some rectangular channels were machined on the mold (roll), which have been replicated in the PMMA substrate. The pressure of the roller, temperature of the PMMA substrate and speed of lamination are assessed. Lastly, the capability of reproducing the generated profiles by the rolling is evaluated in terms of dimensional and structural quality.