Exploring New Possibilities with Semi-Rigid Flex PCB in Modern Electronics

semi-rigid flex PCB

The world of electronics is rapidly evolving, and new technological advancements are occurring every day. With the introduction of semi-rigid flex PCBs, modern electronics have taken a revolutionary turn toward the future. Artist 3D’s semi-rigid flex PCBs combine rigid and flexible materials, allowing for flexibility in certain areas while providing necessary rigidity. Therefore, they open up a range of new possibilities for developing robust and reliable electronics. This article will explore the two main types of semi-rigid flex PCBs, their various applications, and the advantages of using them in electronic devices.

What is semi-rigid flex PCB

semi rigid flex CIRCUIT PCB

Semi-rigid flex PCBs have printed circuit boards made of flexible and rigid-flex materials. They are often applicable where a combination of flexibility and rigidity is necessary for a design. They typically consist of a single layer of rigid material with a flexible material laminated to one or both sides. This combination allows the board to bend in certain areas while providing the necessary rigidity. During manufacture, engineers use PET (polyethylene terephthalate) to prepare the semi-rigid layer. They later separate this layer with rigid core consisting of either Rogers RO4003 or FR4 material.

Types of Semi-Rigid-Flex PCB

The following are the main types of Semi rigid-Flex PCBs:

  • High Touch Semi-rigid-Flex PCBs are printed circuit boards (PCBs) consisting of numerous layers of flexible printed circuits that are joined together to create a flexible yet rigid structure. Polyimide and copper foil are typically the materials that make up flexible printed circuits, and they have an adhesive between them, joining them together. This kind of PCB is mainly suitable for situations where the PCB must be flexible enough to bend without damaging the circuit traces. Consumer electronics, medical equipment, and aerospace applications frequently use high-touch semi-rigid-flex PCBs.
  • Rigid-Flex Low Touch PCBs consist of a mix of flexible and rigid PCB materials that come into minimum touch with one another. The PCB may bend and flex due to this design while remaining robust and stable in other places. Low-touch, semi-rigid PCBs are frequently applicable in situations where weight and space are important considerations. In addition, they are suitable for cases where the PCB needs to twist and flex to fit into a particular shape or form. The PCB can withstand more vibration and stress owing to the enhanced flexibility of stiff and flexible materials.

Applications of Semi-Rigid-Flex PCB

semi rigid flex CIRCUIT

The following are some of the significant applications of semi-rigid flex PCB:

  1. Automobile: In automotive, semi-rigid flex PCBs provide strong, light, and long-lasting circuits. In addition to sensors, controllers, and displays, they are helpful in many more applications. Additionally, they are useful in the wire harnesses for audio systems, navigation systems, and other electrical parts of vehicles. Semi-rigid flex PCBs are incredibly flexible and offer high electromagnetic interference (EMI) protection.
  2. Industrial electronics: Semi-Rigid Flex PCBs apply to the industrial sector to produce sturdy, portable, and dependable circuits for use in robotics and other automated processes, as well as industrial automation systems. They function electrically better while withstanding difficult circumstances like high temperatures and vibration.
  3. Telecommunication: Semi-Rigid Flex PCBs are suitable for applications requiring reliable, high-performance circuits for usage in telecommunication networks. They offer a dependable and economical solution for various applications, including base stations, routers, and more. They are additionally helpful in satellite communication systems to supply reliable and long-lasting connections for efficient operation.
  4. Medical equipment: Semi-Rigid Flex PCBs are common in medical equipment as they offer dependable and affordable solutions for various applications, including patient monitoring, medical imaging, and diagnostic tools. Moreover, they provide a high level of flexibility and EMI shielding, ensuring the precision and safety of medical equipment.
  5. Consumer electronics: Semi-rigid flexible printed circuit boards (PCBs) offer high-performance connectivity for various goods, including smartphones, tablets, video game consoles, and more, in consumer electronics. Additionally, they are applicable in wearables like smartwatches, smart glasses, and fitness trackers.

Benefits of Applying Semi-Rigid-Flex PCBs in Electronic Devices

semi rigid flex board
  1. Smaller Packaging: Semi-rigid flex PCBs are applicable in electrical products to help with packaging and weight reduction. The number of components needed to fit in the device decreases by adopting these flexible circuits, enabling a considerably smaller container. This feature is especially advantageous for portable gadgets that have to be small and light.
  2. Greater Flexibility: Unlike conventional PCBs, semi-rigid flex PCBs offer greater flexibility. They are, therefore, perfect for uses where the equipment must be able to bend and twist, such as wearable technology. In addition, the elasticity aids in lowering the possibility of damage from shock or vibration.
  3. Weight reduction: Semi-rigid flex PCBs are typically lighter than conventional printed circuit boards. As a result, the item is more lightweight overall and is simpler to carry or travel. Additionally, the device’s overall power consumption is decreased due to the reduced weight, increasing battery life.
  4. Semi-rigid, flexible PCBs are more affordable for electronics makers than rigid PCBs. Producers can, therefore, charge the consumer this reasonable amount.
  5. Distinctive Dynamic Stability: Semi-rigid flex PCBs offer distinct dynamic stability. This aspect makes them perfect for motion-sensitive electronics as it helps lower the chance of device failure due to shock or vibration.
  6. Thin Profile: Due to their thinner profile, semi-rigid flex PCBs enable the device to use its space more effectively. This feature aids in reducing the device’s overall size, making it simpler to fit in small locations.
  7. Impact Resistance: Semi-rigid flex PCBs can withstand impacts better than conventional PCBs. They are appropriate for use in demanding applications due to the decreased chance of device failure by shock or vibration.
  8. Environmentally Friendly: The semi-rigid flex PCBs contain eco-friendly components, such as copper, helping them to lessen their total environmental impact.


In conclusion, Artist 3D’s semi-rigid flex PCBs are becoming increasingly popular in the electronics industry due to their many advantages. They offer a combination of flexibility and rigidity, making them ideal for applications where space and weight are at a premium. They are also suitable for automobile, industrial electronics, telecommunication, medical equipment, and consumer electronics industries. Furthermore, they come with various benefits, such as smaller packaging, greater flexibility, weight reduction, affordability, dynamic stability, thin profile, and impact resistance. So, semi-rigid flex PCBs are the perfect option if you’re looking for a reliable and robust solution for your next electronics project.

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