For defect-free production, automatic optical inspection (AOI) is essential. When switching to a lead-free process, manufacturers will face new challenges, and other problems will arise in production, which have aroused people's attention. This article analyzes the entire process of turning to a lead-free process, especially the introduction of 0402 lead-free components in large-scale production.
Due to the lack of lead-free components, the switch to using lead-free components is carried out in stages. In 2004, due to the requirement for smaller and smaller electronic products, manufacturers were forced to widely replace 0603 components and 0805 components with 0402 components.