Flex and Material Sets with Chris Hunrath

June 12, 2018 Judy Warner

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Overview: The rise in flex applications across all industries from medical to automotive, aerospace and military uses means more opportunity for material suppliers to innovate and meet demand. Here what industry expert Chris Hunrath has to share, from general guidelines for designing circuits unique for flex and materials that can be autoclaved over and over. Listen in to this week’s OnTrack expert to learn about flex and material sets.


Show Highlights:

  • Medical applications (i.e. instruments for surgery), automotive, aerospace, military
  • Foils - as you go thicker, its harder to make electrodeposited. More bend cycles out of rolled and yield
  • General Guidelines for designing circuits unique for flex: In general, avoid circuits making turns or bends in bend/flex area - don’t make the circuits go in different directions there and also avoid plated holes in those areas. From a stackup standpoint, balance the construction. Thinner is usually better. Look for opportunities for cracking at the bend point.
  • Cross hatch ground planes have multiple advantages.
  • Pyralux HT, DuPont - new product with unbelievable thermal performance. A continuous operating temperature. Imagine a flex circuit that can be autoclaved over and over.
  • We are a material sciences company. There are really unique ways to put these building blocks together.




Links and Resources:

Pyralux HT

Spread Glass Podcast


Bonus Resources Flex Glossary by DuPont:

Flex glossary, part 1 by Dupont

Flex glossary, part 2 by Dupont

Flex glossary, part 3 by Dupont

Flexible board types, by Dupont



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About the Author

Judy Warner

Judy Warner has held a unique variety of roles in the electronics industry since 1984. She has a deep background in PCB Manufacturing, RF and Microwave PCBs and Contract Manufacturing with a focus on Mil/Aero applications in technical sales and marketing. She has been a blogger, writer, contributor and journalist for several industry publications such as Microwave Journal, The PCB Magazine, The PCB Design Magazine, PDCF&A and IEEE Microwave Magazine and is an active member of multiple IPC Designers Council chapters. In March 2017, Warner became the Director of Community Engagement for Altium and was immediately tasked with the launch of Altium’s monthly On Track Newsletter. She was also instrumental in launching AltiumLive 2017: Annual PCB Design Summit in San Diego and Munich, a newly founded annual Altium User Conference. Her passion is providing resources, supporting and advocating for PCB Designers around the world and acting as brand ambassador for Altium.

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