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Types of Flexible PCBs

Although the term “Flexible PCB” is often used broadly, there are actually several different types. This section introduces the main categories of Flexible PCBs and outlines their core features.
For more detailed information, please refer to each product-specific page.

Overview of Flexible PCB Types

Flexible PCBs can be roughly categorized into three types: single-sided/double-sided, rigid flexible, and multilayer flexible
Below, we introduce the characteristics and benefits of each.

Single-Sided / Double-Sided Flexible PCBs

Single-sided flexible PCBs feature a simple structure composed of a base film, copper foil, and a cover layer.

Double-sided flexible PCBs have copper foil and cover layers on both sides of the substrate. These types are lighter and thinner compared to other PCB types. Thanks to their excellent flexibility, they can be used in areas that require bending.

Double-sided designs support more complex routing and enable space-saving layouts by utilizing both sides of the board.

Single-Sided / Double-Sided Flexible PCBs

Rigid-Flex PCBs

Rigid-flex PCBs combine rigid boards with flexible ones into a single integrated unit. This hybrid structure allows them to leverage the strengths of both types and they are widely used across various electronic devices.

The main advantage of rigid-flex PCBs is the ability to support three-dimensional circuit design. By integrating the boards, there is no need for interconnect wiring between them, which can contribute to device miniaturization and slimmer designs.

Rigid-Flex PCBs

Multilayer Flexible PCBs

Multilayer flexible PCBs are constructed by stacking multiple layers of base film and copper foil. Although slightly thicker than single-/double-sided types, they are commonly used in space-constrained devices such as smartphones.

The key benefits of multilayer flexible PCBs are space-saving and high-density routing. They allow for the integration of more components and complex circuits within limited space, aiding in device miniaturization.

Multilayer Flexible PCBs

Summary

There are multiple types of Flexible PCBs, each offering unique advantages. When placing an order, it is important to clarify your objectives and required specifications in order to select the type best suited to your application.

3 Recommended FPC Manufacturers

by Industry

Choosing a manufacturer that can support everything from design to production can significantly reduce both cost and time. Below are three trusted FPC manufacturers from Japan, each with unique strengths in their respective fields.

For Smartphones & Wearable Devices
Sanyo
Sanyo Official Capture

Source: Sanyo's Official Website (http://www.wsanyo.jp/)

  • Supports multilayer flexible PCBs ideal for compact designs, with a minimum pitch as fine as 20μm
  • Offers manufacturing with flexible materials such as polyimide and LCP, ensuring excellent bendability, heat resistance, and high-frequency performance

Visit Sanyo’s Official Website

Call us for a consultation.

For Medical Equipment
Cir-Tech
Official SERTEC capture

Source: Cir-Tech's Official Website (https://cir-tech.co.jp/)

  • Certified to ISO 13485 and ISO 14971, meeting safety and quality standards for medical equipment
  • Extensive experience in producing FPCs with materials optimized for medical applications

Visit Cir-Tech’s Official Website

Call us

For Automotive Applications
Yamaichi Electronics
Yamaichi Electronics Official Capture

Source: Yamaichi Electronics official website (https://www.yamaichi.co.jp/)

  • Complies with IATF 16949, the international quality management standard for the automotive industry
  • Capable of producing FPCs using LCP, a material known for its heat and chemical resistance

Visit Yamaichi Electronics’ Official Website

Call us