Flexible PCBs — Lightweight, Space-Saving Circuit Solutions from UK PCB Supplier Tate Circuits

Advantages of Flexible PCB Technology

Flexible PCBs offer several unique advantages that make them an ideal choice for compact, lightweight, and high-reliability electronic designs. Unlike traditional rigid PCBs, flexible circuits are engineered to bend, fold, and conform around components or enclosures — opening up new design possibilities and reducing the need for bulky connectors or wiring harnesses.

Here are the key benefits of choosing flexible printed circuit boards for your next project:

1. Space-saving design

Flexible PCBs are built on ultra-thin polyimide material, allowing circuits to fit into extremely tight spaces where rigid boards are not suitable.
This is ideal for modern electronics where every millimetre counts — such as wearables, sensors, cameras, and control modules.

2. Lightweight and low profile

Flex circuits significantly reduce the overall weight and thickness of your assembly.
Their slim construction is perfect for portable or handheld technologies, aerospace components, and medical devices that require minimal mass without compromising performance.

3. Improved reliability in dynamic environments

Flexible PCBs are designed to withstand vibration, movement, and repeated flexing—making them highly reliable in environments where rigid PCBs may crack or fail.
They are widely used in automotive systems, industrial equipment, and any application exposed to mechanical stress.

4. Reduced wiring and interconnect complexity

A flexible PCB can replace multiple connectors and wiring harnesses, simplifying the assembly and reducing the number of potential failure points.
Fewer mechanical joints = fewer production issues and increased long-term reliability.

5. Excellent thermal and chemical resistance

Polyimide-based flexible circuits can perform reliably in high-temperature or chemically demanding environments.
This makes them suitable for applications such as LED lighting, sensors, battery systems, and industrial control units.

6. Supports complex three-dimensional assembly

With the ability to loop, twist, and fold, flex PCBs allow designers to build electronics in 3D shapes, enabling more innovative and space-efficient product designs.
They offer unmatched versatility for engineering teams looking to optimise their enclosure or internal layout.

At Tate Circuits, our UK technical team can help you determine whether flexible PCBs are the right solution for your application — and advise on the ideal material stack-up, bend radius, copper weight, and coverlay options.

📩 Request a flexible PCB quotation ›

Flexible PCB Materials and Construction

Flexible PCBs are engineered from specialised materials that allow the circuit to bend and flex without affecting electrical performance. At Tate Circuits, we manufacture flexible PCBs using high-grade materials and industry-standard processes to ensure durability, stability, and long-term reliability in demanding environments.

Here’s a breakdown of the key materials and construction elements used in our flexible PCB solutions:

Polyimide Substrate (Base Material)

The foundation of every flexible PCB is a polyimide film (commonly known by trade names such as Kapton).
Polyimide is widely used because it offers:

✅ Exceptional flexibility

✅ High thermal stability

✅ Strong resistance to chemicals and moisture

✅ Excellent electrical insulation

This makes polyimide the ideal choice for assemblies where heat, movement, or tight spacing are part of the design.

Copper Foil Layers

Flexible PCBs use rolled annealed (RA) or electro-deposited (ED) copper foils depending on the application.

✅ RA Copper: Best for circuits requiring frequent bending or dynamic flexing

✅ ED Copper: Suitable for static-flex or folded installations

Common copper weights include 1oz and 2oz, with thinner or thicker options available for specialised requirements.

Adhesive or Adhesive-Free Laminates

Depending on the design, flexible PCBs may use:

✅ Adhesive-based laminates: Standard construction, cost-effective

✅ Adhesive-free laminates: Improved thermal performance and better flexibility for fine-pitch applications

Our UK engineers can help determine which laminate system best suits your design needs.

Coverlay (Protective Layer)

Instead of solder mask, flexible PCBs use a polyimide coverlay to protect the copper circuit.
This robust film shields the copper from:

✅ Mechanical stress

✅ Electrical shorts

✅ Heat and chemicals during assembly

Coverlays also help define component openings precisely, providing excellent long-term durability.

Stiffeners (Optional)

Where additional mechanical strength or support is needed — such as under connectors or components — we can add polyimide or FR4 stiffeners.
Stiffeners improve handling, assembly, and mechanical stability without compromising flexibility in other areas of the board.

Available Layer Structures

Tate Circuits can supply a complete range of flexible PCB constructions:

✅ Single-sided flex PCBs

✅ Double-sided flex PCBs

✅ Multilayer flex PCBs

✅ Rigid-flex PCBs (combining rigid and flexible sections)

These construction options allow us to provide solutions for both simple bend-to-fit applications and highly complex electronic assemblies.

UK Technical Support Throughout the Process

Our UK engineering team reviews all Gerber data and stack-up requirements before production to ensure the correct material selection, bend radius, copper weight, and layer structure for your project.
This ensures your flexible PCBs are manufacturable, cost-effective, and reliable from the very first prototype.

📩 Upload your Gerber data for a fast flexible PCB quotation ›

Why choose Tate Circuits as your FLEXIBLE PCB supplier?

As one of the best UK printed circuit board manufacturers for over 40 years, and a China PCB manufacturer for over 15 years, we offer customers the benefit of cost savings on China PCB production together with exceptional UK PCB customer service and experience.

Tate has trained a team of highly experienced UK PCB manufacturers and technical bare PCB engineers. It is this same team that are now responsible for China bare PCB manufacture.

We are proud of our strong position as a long standing UK bare printed circuit board supplier in the UK PCB industry. We offer customers the benefit of cost savings on China PCB manufacture, but with no compromise on the level of service or technical expertise received.

Our UK PCB technical team are on hand throughout the manufacture of your low cost bare printed circuits boards and will assist with expert advice on any engineering queries. We ensure a smooth buying process on every order.

Together with technical strength in the company with our vast experience as a UK PCB manufacturer and our low cost China PCB prices, we are leaders in the supply of bare printed circuits boards.

Tate’s high quality PCB’s are supplied into a variety of sectors including automotive, aviation, lighting and sound equipment, education and medical. We pride ourselves on a professional service with a friendly approach where quality is of paramount importance, in accordance with our ISO9001 Quality Management system and UL Approval.

If you would like to find out about any of our bare PCB fabrication services or to request a no obligation quotation on any of your bare PCB’s, please do contact us here. Our UK PCB sales team look forward to receiving your enquiry. Please be assured that you will receive our best attention.