UAH

Dr. John D. Williams received his BS in Physics from the Louisiana State University (LSU) in 1996 where he examined the breakdown of low temperature aluminum superconducting Josephson junctions in low temperature superconductors. He then became a process and beamline technician at LSU's Center for Advanced Micro Devices (CAMD). At CAMD, he developed hands on experience with ultra high vacuum equipment, sputter deposition, ion milling, contact and deep X-ray lithography, wet and dry etching of silicon, scanning electron microscopy, and electroplating. In 1998, he joined the staff of the Cornell Nanofabrication Facility (CNF) as its first MEMS Exchange Engineer and worked to characterize and document CNF fabrication processes for the DARPA MEMS Exchange program. During his stint at CNF, Dr. Williams learned a great deal about Bosch and chorine inductively couple plasma etching, step and repeat lithography, various etch techniques, and chemical vapor deposition. He returned to LSU in 1999 to complete a Masters in Engineering Science on UV LIGA fabrication processes in 2001. Dr. Williams completed his PhD in Engineering Science from Louisiana State University in 2004 after developing a series of novel resist processes for high aspect ratio SU-8 microstructures using contact lithography and combining UV-LIGA processes to develop a micro-electromagnetic relay. In the summer of 2004, Dr. Williams moved to Sandia National Laboratories in Albuquerque, New Mexico where he was responsible for the science and technology development of LIGA microfabrication. At Sandia, Dr. Williams spearheaded the development of the tilted woodpile photonic crystal, and the lithographic patterning of transparent glass microstructures for the DARPA NGIMG project. During his 3.5 year tenure at SNL, Dr. Williams aided in the development of a dozen microfabricated devices, including THz waveguides, a handheld NMR, and the DARPA Nano Air Vehicle project. Dr. Williams left Sandia to join the Electrical and Computer Engineering faculty at UAHuntsville, in the spring of 2008. He is currently an assistant professor and Associate Director of the Nano Micro Devices Center. His interest include RF MEMS engineering, Bio inspired sensors, 3-D Photonics, and Glass MEMS.

Research Expertise

Dr. Williams’ research is focused primarily in the Electromechanical Engineering, Optics, and Materials Science. He uses lithographic and electrochemical techniques to pattern polymers, metals and glasses for the development of mechanical, optical, and fluidic devices. This fabrication process, commonly known as LIGA, uses any number of different lithographic light sources and electrochemical baths, requiring a solid understanding of materials science to accurately design and model and test the performance of these devices.

Honors & Awards

tba

Recent Publications

K. H. Tantawi, R. Cerro, B. Berdiev, M. E. D. Martin, F. J. Montes, D. Patel, and J. D. Williams, “Investigation of transmembrane protein fused in lipid bilayer membranes supported on porous silicon,” J Med Eng Technol, vol. 37, no. 1, pp. 28–34, Jan. 2013.

K. H. Tantawi, R. Cerro, B. Beriev, M E. Diaz Martin, F. J. Montez, J. D. Williams, "Investigation of Transmembrane Protein fused in Lipid Bilayer Membranes on Porous Silicon," J. Med. Eng. Tech., Accepted Sept. 17, 2012.

P. Sun and J. D. Williams, “Metallic Spiral Three-Dimensional Photonic Crystal with a Full Band Gap at Optical Communication Wavelengths,” IEEE Photonics J., vol. 4, no. 4, pp. 1155–1162, Aug. 2012.

K. H. Tantawi, W. Gaillard, J. Helton, E. Waddell, S. Mirov, V. Fedorov, and J. D. Williams, “In-plane spectroscopy of microfluidic systems made in photosensitive glass,” Microsyst. Technol., Jul. 2012.

P. Sun and J. D. Williams, “Photonic Paint Developed with Metallic Three-Dimensional Photonic Crystals,” Materials, vol. 5, no. 7, pp. 1196–1205, Jul. 2012.

P. Sun and J. D. Williams, “Passband modes beyond waveguide cutoff in metallic tilted-woodpile photonic crystals,” Opt Express, vol. 19, no. 8, pp. 7373–7380, Mar. 2011.

K. H. M. Tantawi, J. Oates, R. Kamali-Sarvestani, N. Bergquist, and J. D. Williams, “Processing of photosensitive APEX™ glass structures with smooth and transparent sidewalls,” J. Micromech. Microeng., vol. 21, no. 1, p. 017001, Jan. 2011.

R. Kamali-Sarvestani and J. D. Williams, “Design and Fabrication of Monolithic High Quality Factor Rf-Solenoids Using Dielectric Substrate,” Microwave J, vol. 54, no. 11, pp. 76–90, 2011.

R. Kamali-Sarvestani and J. D. Williams, “Fabrication of high quality factor RF-solenoids using via structures,” presented at the Wireless and Microwave Technology Conference, Clearwater FL, pp. 1-4, 2011.

R. Kamali-Sarvestani and J. D. Williams, “New high quality factor solenoid based tuned resonator,” presented at the International Microwave Symposium Digest (MTT-S), Baltimore MD, pp. 1-4, 2011.

J. D. Williams and W. C. Sweatt, “Method to fabricate a tilted logpile photonic crystal,” U.S. Patent US 7,820,365 B12, 6-Oct.-2010.

J. D. Williams, C. Schmidt, and D. Serkland, “Processing advances in transparent Foturan® MEMS,” Appl. Phys. A, vol. 99, no. 4, pp. 777–782, May 2010.

R. K. Sarvestani and J. D. Williams, “Frequency-Dependent Control of Grain Size in Electroplating Gold for Nanoscale Applications,” Electrochemical and Solid-State Letters, vol. 13, no. 6, pp. D37–D39, 2010.

J. D. Williams, “Fatigue and fracture mechanics aspects of LIGA fabricated nickel and Ni-20%Fe microstructures,” IJTAMM, vol. 1, no. 3, p. 266, 2010.

J. D. Williams, P. Sun, W. C. Sweatt, and A. R. Ellis, “Metallic-tilted woodpile photonic crystals in the midinfrared,” J. Micro/Nanolith. MEMS MOEMS, vol. 9, no. 2, p. 023011, 2010.

R. Kamali-Sarvestani and J. D. Williams, “Fabrication of high quality factor RF-resonator using embedded inductor and via capacitor,” presented at the IECON 2010-36th Annual Conference on IEEE Industrial Electronics Society, 2010, pp. 2283–2287.

K. H. Tantawi, J. Oates, and J. D. Williams, “Processing of Photosensitive ApexTM glass structures with smooth and,” presented at the IMAPS International Conference and Exhibition on Device Packaging, Pheonix AZ, 2010.

X. G. Peralta, M. C. Wanke, C. L. Arrington, J. D. Williams, I. Brener, A. Strikwerda, R. D. Averitt, W. J. Padilla, E. Smirnova, A. J. Taylor, others, “Large-area metamaterials on thin membranes for multilayer and curved applications at terahertz and higher frequencies,” Appl Phys Lett, vol. 94, no. 16, pp. 161113–161113, 2009.

W. C. Sweatt and J. D. Williams, “Laser remote sensing of backscattered light from a target sample,” U.S. Patent US 7,33,6,351 B1, Feb.-2008.

G. Papadopoulos, J. Tyll, A. Drake, R. Chue, J. D. Williams, Galambos, P.C., “Air entrainment studies for a supersonic micro-ejector system,” Proc. ASME FEDSM, pp. 1–7, 2008.

Details: Hits: 1613

The University of Alabama in Huntsville • 301 Sparkman Drive, Huntsville, AL 35899 • Map