Consideration on the producing of high aspect ratio micro parts using UV sensitive photopolymer

Abstract

This research work deals with the methods for manufacturing high aspect ratio micro mechanical parts by using UV photopolymer. In the first method, polymer structures are produced using a mask-based method. And the second i s a direct focused UV laser beam writing method. The irradiated portion of the liquid photopolymer i s solidified and i t becomes a polymer structure. At first, the solidified shape of the polymer i s examined in each method and the optimum conditions to produce high aspect ratio structures are verified. Next, the comparison of the both methods are made. At l a s t , examples o f structures that have been produced using the methods described are shown.

Fabrication of 3D biocompatible/biodegradable micro-scaffolds using dynamic mask projection microstereolithography

“…A number of SL researchers continue using laser-based scanning systems today, although much focus of current efforts is in mask-based SL systems, where entire layers are projected at a single time using a physical mask instead of scanning the surface with a laser beam. The mask-based SL method was suggested by Nakamoto and Yamaguchi (1996). Further developments led to a dynamic mask projection SL system in 1997 by Bertsch et al where a Liquid Crystal Display (LCD) was used as a dynamic mask instead of the physical mask as used by Nakamotoa and Yamaguchi.…”

Direct Ink Writing Technology (3D Printing) of Graphene-Based Ceramic Nanocomposites: A Review

“…In this process, a white light source is used to project the cross-sections of the 3D part, one projection at a time, with the help of a digital mask [ 65 ]. The idea of this process was invented by Nakamoto and Yamaguchi in 1996 when they used a physical mask instead of a digital projector [ 66 ]. This process, as well as the SLA, also belongs to the category “vat photopolymerization”.…”

Direct Ink Writing Technology (3D Printing) of Graphene-Based Ceramic Nanocomposites: A Review

“…In this process, a white light source is used to project the crosssections of the 3D part, one projection at a time, with the help of a digital mask [74]. The idea of this process was invented by Nakamoto and Yamaguchi in 1996 [83] when they used a physical mask instead of a digital projector. This process, as well as the SLA, also belongs to the category "Vat photopolymerization".…”