Graphene-based conformal coating for heat dissipation on printed circuit boards

Avia Ohayon-Lavi, Gal Shachar-Michaely, Elad Koronio, Yair Keller, Eilam Yalon, Gennady Ziskind, Oren Regev

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Thermal management of electronic devices poses a constant challenge due to the ever-increasing heat fluxes and a great variety of cases that require non-standard engineering solutions. In this work, a novel conformal coating with enhanced thermal conductivity is suggested, which spreads heat effectively from a hot spot on a printed circuit board (PCB). This heat-dissipating composite is created by loading a polymer with graphene nano-platelets (GnP), yielding a two orders of magnitude higher thermal conductivity (33 W/m K) than the neat polymer (0.2 W/m K). The concept, processing and application of the coating to a model PCB, bearing a heat generating component, are presented. It is demonstrated experimentally that, depending on the filler loading levels, the component temperature is substantially lowered when the coating is applied, with the temperature drop reaching up to 35 °C under the given conditions. The numerical simulations offer further insights into the analysis of system performance and corroborate the experimental results. The suggested thin conformal coating can be easily used for thermal management in a wide range of applications in the electronic industry.

Original languageEnglish
Article number120562
JournalApplied Thermal Engineering
Volume229
DOIs
StatePublished - 5 Jul 2023

Keywords

  • Functional coating
  • Graphene
  • Nanocomposite
  • Numerical modeling
  • Thermal conductivity

ASJC Scopus subject areas

  • Mechanical Engineering
  • Energy Engineering and Power Technology
  • Fluid Flow and Transfer Processes
  • Industrial and Manufacturing Engineering

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