High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

作者： Timothy M. Benseman1,2,3, Yang Hao1,2, Vitalii K. Vlasko-Vlasov1, Ulrich Welp1, Alexei E. Koshelev1, Wai-Kwong Kwok1, Ralu Divan4, Courtney Keiser5, Chiharu Watanabe6, Kazuo Kadowaki6 1Materials Science Division,Argonne National Laboratory, 2Department of Physics,University of Illinois at Chicago, 3Department of Physics,CUNY Queens College, 4Center for Nanoscale Materials,Argonne National Laboratory, 5Department of Physics,University of Northern Iowa, 6Institute for Materials Science,University of Tsukuba

简介：

Overview

This article presents a microscopy technique that utilizes Europium thenoyltrifluoroacetonate (EuTFC) to measure self-heating in microelectronic devices at cryogenic temperatures. The method provides a direct measurement of sample surface temperature with a spatial resolution of approximately one micron.

Key Study Components

Area of Science

• Microscopy techniques
• Microelectronics
• Superconductivity

Background

• EuTFC exhibits an optical luminescence line at 612 nm.
• The activation efficiency of this luminescence decreases with temperature.
• This technique can map sample surface temperature based on luminescent response intensity.
• It addresses key questions in high temperature superconductive current tape engineering.

Purpose of Study

• To measure self-heating in microelectronic devices.
• To investigate quench processes in superconductors.
• To enhance understanding of thermal behavior at cryogenic temperatures.

Methods Used

• Make current and voltage connections to the devices on the sample.
• Clean the sample in 100% acetone using an ultrasonic bath.
• Coat the sample with a thin film of EuTFC.
• Micro-image the sample to analyze luminescent response.

Main Results

• Direct measurement of sample surface temperature achieved.
• Spatial resolution of approximately one micron demonstrated.
• Insights into quench processes in superconductive materials provided.
• Potential applications in microelectronics highlighted.

Conclusions

• The microscopy technique offers a novel approach to thermal measurement.
• It can significantly contribute to the field of superconductivity.
• Future research may expand on the applications of this method.

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