Abstract: The UV material was molded by injection molding in this paper, and the effect of the kinds and content of monomer for the replication fidelity of micro parts was discussed. Meanwhile, the height of the micro parts and the cross section shape of the micro parts were served as two criterions to evaluate the effect degree. Experimental result showed that with the active groups increaseing in every kind of the monomer, the replication fidelity presents the downtrend, and with the UV monomer content increaseing in the UV material, the replication fidelity exhitited the downtrend also, but the trend was not obvious as the first experiment.

Key words: injection molding, ultraviolet light, curing, micro part, replication fidelity