Issue link: https://iconnect007.uberflip.com/i/1535414
36 PCB007 MAGAZINE I MAY 2025 Customers are seeking a traceability function integrated directly into the production equip- ment. However, the complex nature of PCB fabrication, which involves mechanical, opti- cal, and chemical processes, presents certain challenges. is article explores the traceability opportunities and limitations within the pro- cess steps of Schmoll machines. Inner Layer Exposure Customers aiming for full trace- ability oen prioritize inline pro- cesses that minimize operator inter- action, starting with dry film pre- treatment and continuing through to resist stripping at the end of the DES (develop, etch, strip) line. In these cases, it's easy to implement inner layer traceability because: Figure 3: Data-matrix code read by CCD camera/ barcode scanner. Figure 2: Data-matrix code after etching. • A data matrix code is laser-marked at the entrance of the line • e direct imaging machine exposes it directly is allows traceability to be built into the process from the earliest stages. Since codes are typically placed on the technological frame, it's important to ensure they remain undamaged during handling— or to include a backup code as a precaution. Inner Layers Before Lamination ere are various methods for inner layer alignment. If the man- ufacturer uses a post-etch punch system, the machine should be