Composite photopolymer microstructures: from planar to 3D devices

In this paper, a survey is made of some technologies in which the photo-definable polymer is used as structural material and where physical properties of polymers are modified to change porosity, mechanical or electrical properties. The paper is organized in three sections: (a) 2D, multilayer photopolymers, (b) High aspect ratio and (c) 3D micro-stereolithography technologies. In addition the authors mention some development in which photo-polymerization is used to locally create special structures.