TRIBE, J. ... et al, 2014. Additively manufactured heterogeneous substrates for three-dimensional control of local permittivity. Electronics Letters, 50 (10), pp. 745-746.
The concept of using additive manufacturing as a method to construct heterogeneous substrates from a single building material via stereolithography is introduced. The dynamic variation of air cavities within the bulk material is used to control the effective permittivity of the host medium. The digitally driven layer process enables full three-dimensional variation of the local permittivity. The high resolution of stereolithography enables sub-millimetre control of air inclusion features. Measurements of the effective permittivity with different air fractions have been compared to analytical results.
This is an Open Access Article. It is published by IET under the Creative Commons Attribution 3.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/3.0/
This work was part of ESPRC [grant number EP/K011383/1]. The authors would also like to thank D. Thompson for all his assistance with the stereolithography apparatus and the financial support from the Materials Research School at Loughborough University.