Defining Stack-Ups for Flex and Rigid-Flex Circuit Boards

The question of complexity with rigid-flex and flexible circuits is never an easy one. Just in the concept alone, rigid-flex and flexible PCB designs pose challenges, whether it’s due to the thin nature of the flexible areas, the larger process to manufacture, or the different materials. But to add to this complexity, the process and difficulty can change due to a variety of factors.

Factors such as layer counts, air gaps, asymmetrical constructions, ZIF connectors, shielding, blind and buried vias, and many other things can factor into a stack-up, turning what was already a difficult construction into something many board manufacturers might not even consider building.

Defining Stack-Ups for Flex and Rigid-Flex Circuit Boards

While these may all seem overwhelming, tackling all of these one at a time makes them that much more manageable, allowing us to build what was a complex board one piece at a time.

In this webinar, we cover stack-ups, ranging from the most basic 1-layer flexible PCB design, all the way up to the more daunting 14-layer rigid-flex PCB stack-up with airgaps, showcasing the various items that can go into a stack-up, and what can be made possible within the world of flexible circuits.


Watch the Recording Below

Watch on YouTube

View the Presentation Slides

View the Slide Deck on SlideShare


Check Out the Full Q&A

We have compiled all the questions submitted at the conclusion of this webinar into a readable format available on our blog.


Webinar Agenda:

  • Overview of stack-up materials and their importance
  • Examples of flex PCB stack-ups
    • When adding layer makes it no longer flexible
    • Overview of bend radius
  • Examples of rigid-flex PCB stack-ups
    • Flex to rigid transition zones
  • Incorporating shielding films and stiffeners in your stack-up
  • Air gap constructions
  • How your stack-up affects the overall cost

Upcoming Webinars

View our upcoming webinar schedule.

Celebrating 70 Years of Manufacturing Excellence   Learn More →
America's Oldest. A History of Innovation.

Over the past 70 years, the electronics manufacturing industry has changed dramatically as the industry continues to adapt to evolving demands and technology. Epec is at the forefront of innovation, with the expertise and agility to move at the speed of today’s businesses. At Epec, the customer comes first, and everything we do must be put through that filter. Whether it is developing e-commerce platforms to make it easier to work with us or creating a new product introduction (NPI) process that helps our customers get to market faster, we must focus on building the new. By doing that every day, and by always making the customer our top priority, we plan on being here for another 70 years and then some.

Learn more about our 70 year story →





Celebrating 70 Years - Epec Engineered Technologies