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Closing the Inspection Gap: Enhancing Electronics Manufacturing Quality With Reflow Process Inspection
October 18, 2023 | Miles Moreau, KICEstimated reading time: 1 minute
In the world of electronics manufacturing, inspection, and quality control are paramount. Manufacturing engineers, process engineers, and managers in the electronics industry are constantly seeking innovative ways to improve the reliability and performance of SMT lines, and OEM auditors want assurances of complete process control and traceability of production for their product builds. Real-time, inline inspection steps are necessary to maintain consistent quality and ensure the highest level of process control and traceability. This article sheds light on the critical role of reflow process inspection (RPI) ensuring the quality and reliability of PCBAs during reflow soldering, and briefly touches on exciting new sensing technology developed by KIC, one of the industry leaders.
The Challenge of Reflow Soldering Inspection
Reflow soldering is a unique step in PCB assembly because it involves no added material. Instead, it relies on the precise application of heat to properly solder the assembly and create reliable solder joints. Unlike other stages where technologies like solder paste inspection (SPI) and automated optical inspection (AOI) use high-resolution cameras to inspect the print of solder paste and placement of components, reflow soldering inspection presents a different technological challenge. Employing similar camera-based inspection methods during the reflow process is cost-prohibitive and technically challenging. While AOI can inspect solder joints after the reflow oven, it does not directly inspect the reflow process and confirm that the proper reflow profile was achieved.
The Role of Temperature Profiling
To ensure the integrity of the reflow soldering process, the industry relies on temperature profiling. This involves measuring and recording the temperature profile that the PCB, solder paste, and components experience as they pass through the reflow oven. This temperature profile directly impacts the quality of solder joints and the overall reliability of the PCBA.
To read this entire conversation, which appeared in the October 2023 issue of SMT007 Magazine, click here.
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