UGPCB High-Performance FPC Flexible Circuit Board – 1 Zu 12 Layer Custom Soft Board for All Your High-Density Interconnect Needs

FPC (Flexible gedruckte Leiterplatte) is changing modern electronics design. According to BCC Research, the global FPC market will grow from $23.3BillichON2025TO$41.7 Milliarden von 2030. That is a CAGR of 12.3%. Research and Markets data shows the 2025 market at $28.36BillichON,RichSInGTO$31.07 Milliarden in 2026 (CAGR 9.5%). Three main drivers fuel this growth: lightweight consumer electronics, EV adoption, und 5G-Infrastruktur. High-performance FPC is now the fastest-growing segment in the Leiterplatte Industrie.

UGPCB is a professional PCB/PCBA manufacturer. We offer one-stop custom FPC services from design to mass production. This page covers our FPC product specifications, Technische Parameter, classification standards, and key advantages. You will find the best soft board solution for your project.

What Is an FPC Flexible Circuit Board? – Product Overview

FPC stands for Flexible Printed Circuit Board. It is also called a flex board or flexible circuit. The insulation base material is polyimide (PI) or polyester (HAUSTIER). A precise etching process forms conductive traces on this thin flexible substrate. Unlike a rigid Leiterplatte, an FPC can bend, fold, and twist in 3D space. This flexibility perfectly supports modern trends toward smaller, leichter, and more integrated electronics.

IPC-6013E-2021 defines flexible printed boards as single-sided, doppelseitig, Mehrschicht, or rigid-flex multilayer structures. These may include stiffeners, plated through holes (PTH), and blind/buried vias. UGPCB strictly follows IPC-2221 design standards and IPC-6013 performance specifications. Every FPC we produce meets international industry requirements.

UGPCB FPC Technical Parameters at a Glance

Product Classification Based on IPC-6013

IPC-6013 defines three classification dimensions.

By Type (Schicht & Struktur)

By Performance Class (Use Scenario) – IPC-6011 & IPC-6013

• Klasse 1 – General electronic products. Minimum reliability requirement for consumer electronics. Least strict testing.

• Klasse 2 – Dedicated service electronics. Higher performance for communication and industrial control equipment.

• Klasse 3 – High-performance electronics. Strict reliability for medical, Luft- und Raumfahrt, and military applications.

By Flexing Condition (Installation & Verwenden)

• Use A – Withstands single bending during installation.

• Use B – Withstands specified repeated flex cycles.

• Use C – Suitable for high-temperature environments above 105°C (221°F).

• Use D – UL certified (meets UL 94 and UL 796F).

Applications of FPC Flexible Circuit Boards

FPC’s thin and flexible nature enables wide use in:

1. Unterhaltungselektronik – Smartphones (Anzeige, camera, battery connections), Tabletten, Laptops, Smartwatches, TWS earbuds, Drohnen.

2. Kfz -Elektronik – In-vehicle displays, Kameramodule, Sensoren, battery management systems (BMS), Adas, LED -Leuchten.

3. Medizinische Geräte – Portable monitors, hearing aids, endoscopes, wearable health trackers, implantable devices.

4. Industrial control – Robot joints, Präzisionsinstrumente, internal wiring harnesses, IoT terminals.

5. Luft- und Raumfahrt & Verteidigung – Lightweight interconnects for satellites, missiles, Radarsysteme.

6. 5G telecom – Base station antennas, RF-Frontend-Module, high-speed signal lines.

BCC Research notes that multilayer FPCs hold 39.4% des globalen Marktes. This share keeps growing because smartphones, Wearables, Automobilelektronik, and medical devices demand higher circuit density.

FPC Base Materials and Performance Features

Primary Base Materials

• PI (Polyimid) – Excellent high-temperature resistance (-40°C bis +125°C) and dimensional stability. Top choice for high-end FPC.

• HAUSTIER (Polyester) – Lower cost. Suitable for consumer applications without extreme temperature requirements.

Top industry suppliers use adhesiveless materials from Panasonic and DuPont, plus adhesive-based materials and coverlays from Sunky.

Key Performance Features

Design Guidelines and Working Principle

How an FPC Works

An FPC works like a rigid Leiterplatte: copper traces on an insulating substrate provide electrical connections between components. The difference is the flexible substrate (PI/PET). This allows the board to bend in 3D space, enabling complex and compact interconnects inside tight product enclosures.

Key Design Points per IPC-2221

1. Conductor spacing & Freigabe – Determine minimum safe distance based on working voltage. For 1kV DC/AC peak, Verschmutzungsgrad 2, uncoated environment, IPC-2221 recommends clearance ≥2.0mm.

2. Minimum trace/space – UGPCB supports 1.5mil/1.5mil. We suggest 3/3mil or above to lower manufacturing difficulty and cost.

3. Via design – Outer diameter should be at least 0.2mm larger than inner diameter (≥0.25mm recommended). A practical balance: 0.3mm inner, 0.55mm outer.

4. Impedanzkontrolle – For high-frequency signals, we offer controlled impedance within ±10% tolerance.

5. Stiffener design – Add stiffeners at component mounting areas or ZIF connector interfaces. Common materials: PI, FR4, steel.

6. Bending area design – Avoid vias and pads in repeated bend zones. Route traces at 90° or with arcs. Place the bend centerline on copper-free areas to maximize flex life.

Übersicht über den Produktionsfluss

UGPCB follows IPC-6013 performance specifications through these key steps:

1. Material cutting – Cut PI/PET base material to size.

2. Bohren – Mechanical or Laserbohrung. Minimum hole diameter 0.1mm.

3. Electroless copper / Überzug – Deposit conductive copper on hole walls to form PTH.

4. Circuit patterning – Laminate dry film → expose → develop → etch → strip film to create fine circuits.

5. Coverlay lamination – Apply coverlay as solder mask protection.

6. Stiffener attachment – Bond PI, FR4, or steel stiffeners on reinforced areas.

7. Oberflächenbeschaffenheit – ENIG (Elektrololes Nickel -Eintauchgold) or OSP.

8. Outer contour – Die punching or laser cutting.

9. Electrical test – Continuity and impedance tests (deviation ≤ ±8%).

10. FQC & Verpackung - - AOI, dimensional inspection, and final packing.

Why Choose UGPCB for FPC Flexible Circuit Boards?

1. Full specification custom solutions – Support 1 Zu 24 Schichten, PI/PET base materials, multiple surface finishes, and solder mask colors. Meets your unique design needs.

2. Industry-leading precision – 1.5mil/1.5mil trace/space, 0.1mm min hole diameter, and 0.1mm finished thickness. Enables high-density interconnect designs.

3. Strict IPC compliance – All FPC products follow IPC-2221 design standards and IPC-6013 performance specifications. Quality guaranteed.

4. One-stop PCBA assembly service – UGPCB not only manufactures high-quality bare FPCs but also provides complete PCBA-Montage. We handle component sourcing, SMT placement, and finished product testing. This streamlines your supply chain from Leiterplatte Zu Leiterplatte, saving communication costs and shortening time to market. Contact our technical sales engineers for more PCBA service details.

5. Fast response and flexible support – Whether you need prototyping or mass production, we put your needs first. Expect professional, effizient, and reliable custom FPC service.

How to Get a Quote?

UGPCB aims to be your trusted FPC partner. To request a quote or technical consultation, please contact us with:

• Your design files – Gerber files, design specification, or BOM list.

• Schlüsselparameter – Layer count, base material type, fertige Dicke, copper weight, Oberflächenbeschaffung, min trace/space, min hole diameter.

• Quantity and lead time – Sample quantity, mass production volume, and expected delivery date.

Our technical engineers will provide a professional DFM analysis and accurate quote within 24 Std..

👉 Request a quote today and start your custom FPC journey!

Data References

Key data in this document comes from:

• ✅ IPC-6013E-2021 – Qualification and Performance Specification for Flexible and Rigid-Flex Printed Boards

• ✅ IPC-2221 – Allgemeiner Standard für Leiterplattendesign

• ✅ BCC Research (2026) - - Global Flexible PCB Market Report

• ✅ Research and Markets (2026) - - Flexible Printed Circuit Board Market Report

• ✅ Industry standard FPC technical specifications (based on JLCPCB FPC parameters)

Contact us for fast FPC quotes and professional support.

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