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86 I-CONNECT007 MAGAZINE I JULY 2026 Dan mentioned, the design of a proper bend radius is critical. Also, dynamic-flex considerations, rolled-annealed copper selection, strain-relief tech- niques, and advanced inspection methods should not be overlooked. What's interesting is that modern display tech- nologies are experiencing similar challenges. Fold- able consumer devices, automotive digital dash- boards, wearable electronics, and advanced medical displays all require reliable interconnections within increasingly compact mechanical structures. The reli- ability knowledge developed for A&D applications is directly applicable to these emerging products. Yes, agreed. What final advice would you offer en- gineers developing lighting and display systems that incorporate flexible and rigid-flex circuits? Hansler: The most important message I can empha- size is that reliability starts early. The flex and rigid- flex performance attributes of power, signal integ- rity, mechanical, and potential thermal management of heat are largely determined during the phases of development, material selection, mechanical pack- aging, and interconnect planning, not during fabri- cation alone. Early collaboration between electrical designers, mechanical engineers, and manufacturing special- ists can prevent many issues before they become costly production or field failures. Lugo: Whether the application is an aircraft display, an industrial control panel, a medical imaging system, or a consumer device, the objective remains the same: delivering reliable visual information to the user. The most successful designs recognize that displays, lighting systems, mechanical packaging, and interconnect technology are all part of a single system. When electrical, mechanical, materials, and manufacturing considerations are addressed together, engineers can maximize both perfor- mance and long-term reliability. That's a lesson A&D programs have taught for decades, and it's one that remains highly relevant to modern display and lighting designers today. Thank you, Dan and Ruben, for sharing your insights. Conclusion If there's a single point to sum up this discussion, it's that reliable display systems don't happen by acci- dent. Whether the application is a fighter aircraft, a medical imaging platform, or the dashboard in your next car, successful flex and rigid-flex designs result from thoughtful collaboration between design, materials, manufacturing, and mechanical engi- neering teams. The A&D industries have spent decades teaching us that interconnect reliability matters just as much as the electronics it connects. As displays become thinner, brighter, lighter, and more complex, those lessons remain highly relevant. From a Target Condition perspective, the goal is simple: Create interconnect solutions that perform long after everyone has forgotten who designed them. After all, the best flex circuit is the one nobody ever has to think about again. Kelly Dack, CIT CID+, spe- cializes in DFx-driven PCB design and applications engineering at Pioneer Circuits, Inc. To read past columns, click here. TA RG E T C O N D I T I O N TA RG E T C O N D I T I O N " If there's a single point to sum up this discussion, it's that reliable display systems don't happen by accident."