Education

  • Ph.D., Georgia Institute of Technology, 1999
  • M.S., Georgia Institute of Technology, 1995
  • B.S., Florida State University, 1993

Research Areas and Descriptors

  • Micro and Nano Engineering; Microscale heat transfer, thermophysical properties, nanostructured materials, nanodevices, and device reliability.

Background

Dr. Graham began at Tech in 2003 as an Assistant Professor. Prior, he was a Senior Member of the Technical Staff at Sandia National Laboratories in Livermore, California.

Research

Dr. Graham's research focuses on the fabrication, packaging, and reliability of electronic devices.  In this work, his group has expertise in the thermal analysis and reliability of GaN based wide bandgap semiconductors used in RF communications, solid state lighting, and power electronics.  His group develops experimental techniques to measure the temperature and stress distribution in these devices down to the individual transistor level.  In addition, they investigate the thermophysical properties and thermal interface resistance between the active layers and substrates such as SiC, Si, and diamond.  Coupled electro-thermal and thermomechanical modeling of these devices are used under both DC and transient timescales to understand the performance of these devices.  Finally, methods to effective remove the heat from these devices using single phase and two phase cooling are under investigation.

In addition to wide bandgap devices, the Graham group is also working on packaging and reliability of organic electronics and thin film solar cells.  His group has developed expertise in the creation of ultra-barrier film technology based on vacuum deposited thin films for the hermetic sealing of electronics.  The mass transport along with the mechanics of the films (fracture, adhesion, etc.) and chemical resistance is important for the fabrication of thin film and flexible electronics for harsh environments.  The Graham group regularly collaborates with the Center for Organic Photonics and Electronics in this area of research (www.cope.gatech.edu).

Distinctions

  • Joseph H. Anderer Faculty Fellow, 2008-2013
  • National Academy of Engineering U. S. Frontiers of Engineering Symposium, 2007
  • National Science Foundation
    • Faculty Early Career Development Award, 2005-2010
    • Facilitating Academic Careers in Engineering and Science Grant, 2003
  • Society of Manufacturing Engineers International M. Eugene Merchant Outstanding Young Manufacturing Engineer Award, 2004

Representative Publications

  • J. Lee, et al., 2007. Thermal Conduction From Microcantilever Heaters in Partial Vacuum. Journal of Applied Physics, 101, 014906-1014906-6.
    Selected for republication in the Virtual Journal of Nanoscale Science & Technology 15(3), 2007. www.vjnano.org; T. Beechem, et al., 2007. The Role of Interface Disorder on Thermal Boundary Resistance Using A Virtual Crystal Approach. Applied Physics Letters, in-press.
  • M. Abel, et al., 2007. Raman Thermometry of Polysilicon MEMS in the Presence of an Evolving Stress. Journal of Heat Transfer, in press.
  • A. Allen, et al., 2006. Nanomaterial Transfer Using Hot Embossing For Flexible Electronic Devices. Applied Physics Letters 88, 083112083114.
    Selected for republication in the Virtual Journal of Nanoscale Science & Technology 13(9), 2006. www.vjnano.org