Western General Hospital 1 article published in JoVE Bioengineering Cell Patterning on Photolithographically Defined Parylene-C: SiO2 Substrates Mark A. Hughes1, Paul M. Brennan2, Andrew S. Bunting3, Mike J. Shipston1, Alan F. Murray3 1Centre for Integrative Physiology, School of Biomedical Sciences, The University of Edinburgh, 2Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, 3School of Engineering, Institute for Integrated Micro and Nano Systems, The University of Edinburgh This protocol describes a microfabrication-compatible method for cell patterning on SiO2. A predefined parylene-C design is photolithographically printed on SiO2 wafers. Following incubation with serum (or other activation solution) cells adhere specifically to (and grow according to the conformity of) underlying parylene-C, whilst being repulsed by SiO2 regions.