Nondestructive measurement of conformal coating thickness on printed circuit board with ultra-high resolution optical coherence tomography

• Main Authors: Shao, Xiao, Chen, Xinjian, Yu, Xiaojun, Hu, Ya, Liu, Linbo, Shi, Fei, Shao, Wei, Mo, Jianhua
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2019
• Subjects: Optical Coherence Tomography; DRNTU::Engineering::Electrical and electronic engineering; Conformal Coating
• Online Access: https://hdl.handle.net/10356/106017; http://hdl.handle.net/10220/48871; http://dx.doi.org/10.1109/ACCESS.2019.2896622
• Institution: Nanyang Technological University

Conformal coating (CC) is widely used to protect printed circuit board from corrosion, mold growth, and electrical failures. To ensure effective protection, the thickness of the CC layer needs to be well controlled. However, to date, the coating thickness is usually measured in a destructive way und...