Computer-Aided Design and Processing of 3D Micro Ceramic Structures

摘要

Three dimensional micro-architecture for ceramics have been developed with a CAD/CAM stereolithography and successive heat treatment. Alumina photonic crystals of a diamond structure with the unit cell dimension of 375μm were fabricated by using a new micro-stereolithographic machine. These micro photonic crystals opened photonic band gap in a terahertz wave region. Formation of a micro cavity in the photonic crystal produced localization modes of electromagnetic wave in the band gap. 3D photonic fractals with a Menger sponge structure made of the TiO{sub}2-SiO{sub}2/resin composite localized or confined microwave with a specific wave length in the fractal structure as well. These ceramic photonic crystals and fractals are expected to apply to various IT and sensor devices in a wide band from microwave to terahertz wave.