高电压技术2025，Vol.51Issue(10)：4978-4991,14.DOI:10.13336/j.1003-6520.hve.20250249
基于方波激励电致发光效应的电场与温度可视化方法
Visualization Method of Electric Field and Temperature Based on Square Wave Excitation Electroluminescence Effect
摘要
Abstract
To enable electric field visualization and quantitative analysis in direct bonded copper(DBC)substrates,this study investigates electroluminescence(EL)characteristics under square-wave excitation,aiming to establish a visual in-version model for electric field distribution.Initially,EL mechanisms and physical processes were analyzed using time-resolved optical response techniques and integral spectroscopy.A fitting relationship between luminescence intensity and a dimensionless electric field index was then established via Gaussian process regression(GPR).Furthermore,a mapping between the G-channel to B-channel intensity ratio(RG/B)in EL images and temperature was established on the basis of high-temperature EL spectral characteristics.The significant scattering from strong electric field regions to weak electric field regions is taken into account,and a blind deconvolution algorithm was adopted to correct the luminous dis-tribution.Subsequently,the surface electric field distribution of interdigitated electrode was deduced.The effectiveness of the proposed electric field inversion method was validated by the linear relationship between inverted electric field results in the finger electrode's central region and applied voltage.Finally,the electric field distribution,high-risk insulation point probability,and high-temperature field distribution of the DBC substrate were visualized.Results demonstrate the method achieves high-resolution electric field and temperature visualization,offering a novel approach for DBC substrate insulation verification.关键词
DBC衬底/绝缘校核/电致发光/电场可视化反演/温度分布可视化Key words
DBC substrate/insulation verification/electroluminescence/visualization inversion of electric field/visual-ization of temperature distribution引用本文复制引用
王凯,任明,周沁昱,张崇兴,董明..基于方波激励电致发光效应的电场与温度可视化方法[J].高电压技术,2025,51(10):4978-4991,14.基金项目
国家重点研发计划(2023YFB2406900).Project supported by National Key R&D Program of China(2023YFB2406900). （2023YFB2406900）
