Experimental researches on thermal properties of dielectric thin films with weak mechanical intensity

  • Hongxia Gao*
  • , Jianzu Yu
  • , Lei Yu
  • *Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Thermophysical properties of dielectric thin films are essential for researching on the thermal performance of microelectronic, optoelectronic and MEMS devices as well as for their reliability. The Joule-heating experimental method of the double-layer free-standing thin-film structure is used to determine the thermophysical properties of SiO2and Al 2O3thin films by experiment. The thin films are deposited on the SiNx thin film by PECVD and EBE respectively. The results show that the thermal conductivity of both thin films have the obvious size effect. The value is merely a fraction of the one reported for each bulk specimen, and is coincident with the calculated Minimum Thermal Conductivity (MTC). The measured specific heat capacities are almost the same as those of the corresponding bulk. The steady state heat flow of SiO2/SiN x and Al2O3/SiNx, membranes in the measurement is analyzed. The thermal radiation of the thin films always takes a large portion of total heat rejection. Therefore it can not be ignored as many macroscale thermal measurements always do.

Original languageEnglish
Title of host publicationProceedings of the ASME Micro/Nanoscale Heat and Mass Transfer International Conference 2009, MNHMT2009
Pages463-468
Number of pages6
DOIs
StatePublished - 2010
EventASME 2009 Micro/Nanoscale Heat and Mass Transfer International Conference 2009, MNHMT2009 - Shanghai, China
Duration: 18 Dec 200921 Dec 2009

Publication series

NameProceedings of the ASME Micro/Nanoscale Heat and Mass Transfer International Conference 2009, MNHMT2009
Volume2

Conference

ConferenceASME 2009 Micro/Nanoscale Heat and Mass Transfer International Conference 2009, MNHMT2009
Country/TerritoryChina
CityShanghai
Period18/12/0921/12/09

Keywords

  • Al Othin film
  • Microscale heat transfer
  • SiOthin film
  • Size effect
  • Thermophysical property

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