Optimization of an open-ended microwave oven for microelectronics packaging

Keith I. Sinclair, George Goussetis, Marc P. Y. Desmulliez, Alan J. Sangster, Tirn Tilford, Chris Bailey, A. Kevin Parrott

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


A physically open, but electrically shielded, microwave open oven can be produced by virtue of the evanescent fields in a waveguide below cutoff. The below cutoff heating chamber is fed by a transverse magnetic resonance established in a dielectric-filled section of the waveguide exploiting continuity of normal electric flux. In order to optimize the fields and the performance of the oven, a thin layer of a dielectric material with higher permittivity is inserted at the interface. Analysis and synthesis of an optimized open oven predicts field enhancement in the heating chamber up to 9.4 dB. Results from experimental testing on two fabricated prototypes are in agreement with the simulated predictions, and demonstrate an up to tenfold improvement in the heating performance. The open-ended oven allows for simultaneous precision alignment, testing, and efficient curing of microelectronic devices, significantly increasing productivity gains. © 2008 IEEE.

Original languageEnglish
Pages (from-to)2635-2641
Number of pages7
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number11
Publication statusPublished - Nov 2008


  • microwave curing
  • heating
  • waveguide resonator
  • resonant cavity


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