In situ high-resolution thermal microscopy on integrated circuits

Guan Yu Zhuo, Hai-Ching Su, Hsien Yi Wang, Ming-Che Chan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The miniaturization of metal tracks in integrated circuits (ICs) can cause abnormal heat dissipation, resulting in electrostatic discharge, overvoltage breakdown, and other unwanted issues. Unfortunately, locating areas of abnormal heat dissipation is limited either by the spatial resolution or imaging acquisition speed of current thermal analytical techniques. A rapid, non-contact approach to the thermal imaging of ICs with sub-μm resolution could help to alleviate this issue. In this work, based on the intensity of the temperature-dependent two-photon fluorescence (TPF) of Rhodamine 6G (R6G) material, we developed a novel fast and non-invasive thermal microscopy with a sub-μm resolution. Its application to the location of hotspots that may evolve into thermally induced defects in ICs was also demonstrated. To the best of our knowledge, this is the first study to present highresolution 2D thermal microscopic images of ICs, showing the generation, propagation, and distribution of heat during its operation. According to the demonstrated results, this scheme has considerable potential for future in situ hotspot analysis during the optimization stage of IC development.

Original languageEnglish
Pages (from-to)21548-21558
Number of pages11
JournalOptics Express
Issue number18
StatePublished - 4 Sep 2017


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