Flexible PCB (FPC)
Single/double-sided and multilayer FPC with PI or PET base: dynamic bending, tight bend radii and stiffener options supported.
- 0.5mmMin. bend radius (static)
- 100kcyclesDynamic flex life (typical)
- 0.05mmThinnest base thickness
What is an FPC
FPC uses polyimide (PI) or PET film as the base material - bendable, conformable to curved surfaces and only one-third the weight of FR-4 of the same area - widely used in display, battery and camera flex assemblies and wearables.
| Base Material | PI (200℃+ heat resistance) / PET (lower cost) |
| Structure | Coverlay + base film + copper foil (RA copper for better bending) |
| Types | Adhesive PI (economical) / adhesiveless PI (longer flex life) |
| Stiffeners | PI / FR4 / steel + PSA adhesive backing |
| Surface Finish | ENIG / electroplated gold (gold fingers) / selective gold |
| Typical Uses | Flex assemblies, wearables, automotive, robot joints |
Choose the Structure by Bend Grade
Bend requirements determine the base material, copper foil type and stack-up - confirm the bending mode before selecting materials.
Static Bending
Formed at installation- Bend radius ≥ 3x board thickness
- Adhesive PI + ED copper is sufficient
- Typical: flex assemblies, display connections
Dynamic Bending
Repeated motion- Bend radius ≥ 6x board thickness
- Adhesiveless PI + RA copper
- Typical: flip phones, sliding rails, joints
Million-Cycle Grade
Ultra-high life- Bend radius ≥ 10x board thickness
- Neutral-axis trace design
- Typical: print heads, automotive antennas
Choosing the Right PI Base
Two mainstream flex copper-clad laminates — balance flex grade, temperature rating and cost.
Adhesive PI
Cost-effective- Lower cost, assembly-friendly
- Stable peel strength for static bending
- Best for: consumer electronics, display & battery flex
- Dynamic flex life: tens of thousands of cycles
Adhesiveless PI
High performance- Thinner and more flexible with stronger bend endurance
- Higher temperature rating for lead-free reflow and harsh use
- Best for: dynamic bending, wearables, automotive
- Dynamic flex life: 100k+ cycles
Product Showcase
Static Bending Cases (Flex Assemblies)
2-Layer Phone Battery Flex
1-Layer Display Connection Flex
4-Layer Camera Module FPC
2-Layer Speaker Audio Flex
Dynamic Bending Cases (Motion)
4-Layer Fitness Band Main Flex
2-Layer Automotive Steering Wheel FPC
3-Layer Print Head Dynamic FPC
6-Layer Mechanical Keyboard FPC
Manufacturing Capabilities
Standard manufacturing capability range for this product line. Contact our engineers to evaluate special requirements.
| Layer Count | 1 - 6 layers |
| Base Material | PI / PET |
| Base Thickness | 0.05 - 0.2 mm |
| Min. Trace/Space | 3/3 mil |
| Bend Radius | Dynamic ≥ 6x thickness / static ≥ 3x |
| Stiffeners | PI / FR4 / steel + PSA adhesive backing |
| Surface Finish | ENIG / electroplated gold / selective gold |
| Impedance Control | Supported (differential / single-ended) |
| Min. Hole Size | 0.15 mm |
| Dynamic Flex Life | 100,000+ cycles (typical for adhesiveless PI) |
Lead Time & Pricing Highlights
Bend it, fold it, fit it
Dynamic Bending
Bend-radius-optimized stack-ups rated for millions of flex cycles.
Ultra Thin
0.05-0.2mm flex base materials for space-critical assemblies.
Rigid-Flex
Rigid-flex combinations remove connectors and improve reliability.
Typical Applications
Consumer Electronics
Camera, display and battery flex assemblies in phones.
Wearables & Medical
Health bands and wearable sensors that conform to curved surfaces.
Automotive Electronics
Steering wheel, lidar and dashboard flex circuits.
Robotics
Continuous-motion circuits for joints and robot arms.
From Gerber to delivery in four steps
Upload Files
Send Gerber/ODB++ and stack-up table; standard boards get instant pricing.
Review & Quote
Complex boards get an engineer review before quoting.
Confirm Production
Confirm specs and price, pay online, and your boards enter the production queue.
Test & Deliver
Flying probe/fixture testing on every board with reports, shipped worldwide.
Further Reading
For more PCB process knowledge and technical practice, visit our blog center.
