Issue link: https://iconnect007.uberflip.com/i/1539960
54 SMT007 MAGAZINE I OCTOBER 2025 • Cycle limitation: Minimize the number of reballing or rework cycles to reduce metalliza- tion fatigue and extend component longevity • Standards compliance: Validate that all pro- cesses meet applicable requirements such as IPC J-STD-001, IPC-7711, GEIA-STD-0006, and IEC TS 62647-4 • Qualified personnel and equipment: Use only trained technicians and calibrated, auto- mated equipment to maintain repeatability and reliability Inspection Challenges Visual Inspection Following IPC-A-610 standards, inspectors use micro- scopes or borescopes to check for missing balls, sol- der bridging, and ball size uniformity. Proper lighting, magnification selection, and operator training are essential to ensure consistency. X-ray Inspection Since most BGA joints are hidden, X-ray inspection is critical for uncovering defects such as head-in- pillow, voids, or shorts that visual inspection cannot detect. Multi-angle imaging increases defect detec- tion reliability. Conclusion BGA reballing is a proven and reliable process for extending the life and usability of high-value compo- nents. Whether the goal is to convert solder alloys for defense and aerospace compliance, refurbish parts for continued use, or restore components to their original specifications, reballing offers manu- facturers a cost-effective alternative to scrapping. When performed correctly—with controlled thermal profiles, precise ball placement, and thorough inspec- tion—reballing ensures components meet the strin- gent requirements of commercial, military, and aero- space applications. By adhering to industry standards and employing robust inspection practices, engineers and buyers can confidently incorporate reballing into their rework strategies, maintaining both performance and reliability in advanced electronic assemblies. As electronic devices continue to shrink while demanding higher reliability and processing power, reballing will play an increasingly important role in sustaining supply chains, meeting compliance needs, and extending the service life of critical com- ponents. SMT007 Nash Bell is president of BEST, Inc. To read past columns, click here. ▼ X- ray v i ew of re b a l l i n g d efe ct s . K N O C K I N G D OW N T H E B O N E P I L E