911EDA PCB Design Services Logo

Basics of Flexible Printed Circuit Board Design

Introduction to Flex PCB Design


The world of electronics is rapidly evolving, with flexible printed circuit boards (PCBs) leading the charge. At 911EDA, we pride ourselves on our innovative approach to Flex PCB design, aligning with the demands of the modern electronics landscape.

Importance of Material Selection

One of the foundational elements of any PCB is the materials used. Dielectric insulators, copper foil, and other conductors play a pivotal role. They determine the PCB’s performance, flexibility, and reliability. Selecting the right materials is vital, especially in flex PCBs where bendability is a major concern.

Understanding Flexibility and Bendability


Flex PCBs bring forth the challenge and advantage of flexibility. This flexibility, often evaluated in terms of bendability, is essential in applications where space constraints are present. Metrics such as bending axes and bend ratio provide insights into how flexible a PCB truly is. It’s crucial to understand the difference between flexibility and bendability to ensure optimal PCB performance. 

Stack-up Selection: Building the Core

Infographic detailing the process of stack-up selection in flexible PCB design.
  • Stack-up Selection: The arrangement of PCB layers plays a pivotal role in its overall performance. It determines the PCB’s overall thickness and how it responds to various stresses.
  • Layer Arrangement: The order in which individual layers are placed affects signal integrity, especially in high-frequency applications.
  • IPC Guidelines: Adherence to industry standards ensures reliability and compliance. The IPC guidelines offer a roadmap for optimal stack-up selection.

Preventing Circuit Damage: Stress and Orientation

With flexibility comes the challenge of preventing circuit damage. Stress concentration, especially around bends, can lead to failures. Conductor orientation and layout strategies must be employed to mitigate these risks.

PCB Performance Metrics

For any PCB design, especially flexible ones, efficiency and performance are paramount. Factors such as impedance management, signal integrity, and the use of copper features significantly impact a board’s performance. It’s essential to understand these metrics to achieve a balance between performance and durability.

Cost, Turn-Times, and Design Economics

Understanding the economics of PCB design is just as crucial. Factors like board size, surface finish, and material choice play a role in determining costs. At 911EDA, we ensure our designs are not only innovative but also cost-effective, offering the best of both worlds.


Flexible PCB design is both an art and a science, merging innovation with established design principles. At 911EDA, we embrace the challenges and opportunities this presents, serving as your partner in navigating the intricate landscape of flexible PCB design.

Contact 911EDA today for expert PCB design assistance.

Basics of Flexible Printed Circuit Board Design
Article Name
Basics of Flexible Printed Circuit Board Design
Explore the essentials of Flexible PCB design, from materials to techniques. Your go-to guide for understanding flexible circuitry.
Publisher Name
Publisher Logo

911EDA PCB Design Services Logo
  • 2131 Palomar Airport Rd., Ste. 239
    Carlsbad, CA 92011
  • (800) 320-2480
  • sales@911eda.com

Key Concepts

© 2007-2023 911EDA, Inc.