Influence of upper layer on measuring thermal conductivity of multilayer thin films using differential 3-ω method

Sangwoo Shin, Han Na Cho, Beom Seok Kim, Hyung Hee Cho

Research output: Contribution to journalArticle

20 Citations (Scopus)


We present an intrinsic error in differential 3-ω measurement method due to two-dimensional heat spreading effect in the upper layer of the target film. By measuring thermal conductivities of 300 nm PECVD-grown silicon dioxide thin films with various thicknesses of upper layers, significant heat spreading effect is observed. Also, analytical modeling regarding apparent thin film thermal conductivity is conducted for verification of experimental results. Experimental results as well as analytical results show that the measurement error tends to increase with thickness of upper layer due to two-dimensional heat spreading effect.

Original languageEnglish
Pages (from-to)933-936
Number of pages4
JournalThin Solid Films
Issue number2
Publication statusPublished - 2008 Nov 28


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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