2024

Vol.31 No.2

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  • Journal of the Microelectronics and Packaging Society
  • Volume 31(2); 2024
  • Article

Review

Journal of the Microelectronics and Packaging Society 2024;31(2):63-68. Published online: Jul, 25, 2024

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DOI : doi.org/10.6117/kmeps.2024.31.2.063

Application and Performance Evaluation of Photodiode-Based Planck Thermometry (PDPT) in Laser-Based Packaging Processes

  • Chanwoong Wi1 , Junwon Lee1 , Jaehyung Woo1 , Hakyung Jeong2 , Jihoon Jeong3 , and Seunghwoi Han1,†
    1 Department of Mechanical Engineering, Chonnam National University, Gwangju, Republic of Korea, 2 Korea Institute of Machinery & Materials, 3 Department of Industrial & System Engineering, Texas A&M University, College Station, TX, United States
Corresponding author E-mail: shan@chonnam.ac.kr
Abstract

With the increasing use of transparent displays and flexible devices, polymer substrates offering excellent flexibility and strength are in demand. Since polymers are sensitive to heat, precise temperature control during the process is necessary. The study proposes a temperature measurement system for the laser processing area within the polymer base, aiming to address the drawbacks of using these polymer bases in laser-based selective processing technology. It presents the possibility of optimizing the process conditions of the polymer substrate through local temperature change measurements in the laser processing area. We developed and implemented the PDPT (Photodiode-based Planck Thermometry) to measure temperature in the laser-processing area. PDPT is a non-destructive, contact-free system capable of real-time measurement of local temperature increases. We monitored the temperature fluctuations during the laser processing of the polymer substrate. The study shows that the proposed laser-based temperature measurement technology can measure real-time temperature during laser processing, facilitating optimal production conditions. Furthermore, we anticipate the application of this technology in various laser-based processes, including essential micro-laser processing and 3D printing.

Keywords Photodiode-based Planck Thermometry (PDPT), Laser-based packaging processes, Real-time temperature monitoring, High-resolution temperature measurement

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