PCB & PCBA Manufacturer
Custom FPC – FPC Board for Your Specific Design
Not every FPC manufacturer is willing to build your exact design. Some push proprietary stackups, standardize away your specifications, or charge heavy NRE fees for custom requirements.
As a custom FPC manufacturer, we build exactly what you design – no modifications unless you approve. Your Gerber files are your specifications. Your stackup is our stackup. Your material choices, copper weights, and finish preferences – we follow them precisely.
We are a true custom manufacturer, not a catalog house.
What Custom FPC Manufacturing Means
| Aspect | Standard Catalog House | Custom FPC Manufacturer (Us) |
|---|---|---|
| Design ownership | Their standard only | Your design, unchanged |
| Layer stackup | Fixed options | Any stackup you specify |
| Board shape | Rectangular only | Any shape – routed to your outline |
| Material choices | Limited stock | Any polyimide, RA copper – you choose |
| Coverlay color | Yellow only | Yellow, black, white – your choice |
| Stiffener type | Limited options | FR4, polyimide, metal – any thickness |
| Modifications | May change to fit process | No changes without approval |
| IP protection | Limited | NDA available, secure handling |
| Minimum quantity | Often high (500+) | Flexible (5 to 100,000+) |
Why Choose a Custom FPC Manufacturer?
| Benefit | What It Means for You |
|---|---|
| Your design, your way | No forced changes to fit “standard” processes |
| Full IP protection | Your proprietary designs remain confidential |
| Long-term consistency | Same specification, same quality, every batch |
| Flexible volumes | Scale from prototype (5 pcs) to mass production (100k+) |
| Direct engineering support | Real engineers review your FPC design |
| Material freedom | Use your preferred polyimide, RA copper, adhesive |
| Competitive pricing | Volume pricing as you scale |
What We Offer as Your Custom FPC Manufacturer
| Service | Description |
|---|---|
| Custom layer stackup | 1 to 6 layers (8 on request) – any arrangement |
| Board thickness | 0.1mm to 0.4mm (up to 0.6mm with stiffeners) |
| Copper type | RA copper standard – rolled annealed |
| Copper weight | 0.5 oz or 1 oz – your choice |
| Min trace width/spacing | 3 mil / 3 mil (0.075mm) – 2 mil available |
| Coverlay color | Yellow, black, white – your choice |
| Stiffeners | FR4, polyimide, metal – any thickness |
| PSA adhesive backing | 3M or equivalent – for mounting |
| EMI shielding | Silver ink, copper layer, shielding film |
| Surface finish | ENIG, HASL, Immersion Silver, OSP, Hard Gold |
Custom FPC – Material Options
| Material Category | Standard | Custom Options |
|---|---|---|
| Base polyimide | DuPont Kapton | Equivalent or customer-specified |
| Copper – flex | RA copper (rolled annealed) | ED copper (static flex only) |
| Adhesive | Acrylic adhesive | Epoxy or adhesive-less |
| Coverlay | Polyimide (yellow) | Black, white, clear |
| Stiffener | FR4 (0.1-0.5mm) | Polyimide, metal (steel, aluminum) |
| PSA adhesive | 3M 467MP | 3M 468MP, 9495MP, or customer-specified |
| Surface finish | ENIG | HASL, Immersion Silver, OSP, Hard Gold |
Custom FPC – Layer Stackup Examples
1-Layer Custom FPC
| Layer | Material | Thickness |
|---|---|---|
| Coverlay | Polyimide (your color) | 0.5 mil |
| Copper | RA copper (0.5 or 1 oz) | 0.7-1.4 mil |
| Adhesive | Acrylic | 0.5 mil |
| Polyimide core | Kapton | 1-2 mil |
| Adhesive | Acrylic | 0.5 mil |
| Copper | RA copper (optional) | 0.7-1.4 mil |
| Coverlay | Polyimide (your color) | 0.5 mil |
| Total | ~0.1-0.2mm |
2-Layer Custom FPC
| Layer | Material | Thickness |
|---|---|---|
| Coverlay | Polyimide (your color) | 0.5 mil |
| Copper L1 | RA copper | 0.7 mil |
| Adhesive | Acrylic | 0.5 mil |
| Polyimide core | Kapton | 1-2 mil |
| Adhesive | Acrylic | 0.5 mil |
| Copper L2 | RA copper | 0.7 mil |
| Coverlay | Polyimide (your color) | 0.5 mil |
| Total | ~0.15-0.25mm |
4-Layer Custom FPC – available on request with custom stackup.
Technical Specifications for Custom FPC
| Parameter | Our Custom Capability |
|---|---|
| Layer count | 1 to 6 layers (8 on request) |
| Board thickness (no stiffener) | 0.1mm to 0.4mm |
| Board thickness (with stiffener) | 0.2mm to 0.6mm |
| Copper weight | 0.5 oz or 1 oz |
| Copper type | RA copper standard |
| Min trace width/spacing | 3 mil / 3 mil (2 mil available) |
| Min drill size (mechanical) | 0.15mm |
| Min drill size (laser) | 0.10mm |
| Min coverlay opening | 0.2mm |
| Max board size | 250mm x 600mm |
| Stiffener thickness | 0.05mm to 0.5mm |
| Stiffener materials | FR4, polyimide, aluminum, steel |
| Surface finishes | ENIG, HASL, Immersion Silver, OSP, Hard Gold |
| Coverlay colors | Yellow, black, white (other on request) |
| PSA adhesive | 3M 467MP, 468MP, 9495MP |
Custom FPC – Design Flexibility
| Design Element | Standard Options | Custom Options |
|---|---|---|
| Board shape | Rectangular | Any shape – routed to outline |
| Cutouts / slots | Limited | Custom – any size/position |
| Stiffener shape | Rectangular | Custom – matches board shape |
| Coverlay openings | Standard pads | Custom – any size/position |
| Gold contacts | Standard ENIG | Selective hard gold (high wear) |
| EMI shielding | Not included | Silver ink, copper layer, shielding film |
| PSA adhesive | Not included | Full coverage or selective |
Our Custom FPC Process
| Step | What Happens |
|---|---|
| 1. You send Gerber files | Complete design including stackup, materials, specifications |
| 2. Sign NDA (optional) | For IP protection |
| 3. Free DFM review | We verify manufacturability – no changes without approval |
| 4. Stackup validation | We confirm layer arrangement meets your requirements |
| 5. Quotation | Based exactly on your specifications |
| 6. First article (recommended) | 5-20 pieces for design validation |
| 7. Production | Built to your specifications, every batch |
| 8. 100% electrical test | Including flex continuity |
| 9. Secure shipping | Worldwide delivery |
Industries We Serve as Custom FPC Manufacturer
| Industry | Typical Custom FPC Applications | Special Requirements |
|---|---|---|
| Wearables | Smartwatches, fitness bands, hearing aids | Ultra-thin (0.1-0.2mm), black coverlay |
| Medical | Endoscopes, patient monitors, sensors | High reliability, traceability |
| Aerospace | Avionics, satellite harnesses | High reliability, lightweight |
| Automotive | Sensors, lighting, battery management | Temperature range, vibration |
| Industrial | Robotics, sensors, dynamic cabling | Dynamic flex, rugged |
| Consumer | Smartphones, foldable phones, cameras | High volume, fine pitch |
| Defense | Portable radios, ruggedized equipment | MIL-spec, ITAR (on request) |
Why Choose Us for Custom FPC?
| Feature | What You Get |
|---|---|
| True custom manufacturing | Your design, unchanged – no forced standardizations |
| Full IP protection | NDA available, secure file handling |
| Any layer count | 1 to 6 layers (8 on request) – your choice |
| Any material | Polyimide, RA copper, adhesive – you specify |
| Any quantity | 5 pieces to 100,000+ pieces |
| Free DFM review | Flex-specific check at no charge |
| RA copper standard | Withstands bending – no upcharge |
| ISO9001 & UL certified | Quality guaranteed |
Order Process for Custom FPC
Send your design files – Gerber, stackup, specifications
Sign NDA (optional) – for IP protection
Free DFM review – we verify manufacturability
Stackup validation – confirm layer arrangement
Receive quotation – based exactly on your specifications
First article (recommended) – 5-20 pieces for validation
Production – built to your exact specifications
100% electrical test
Secure shipping
Your design, your specifications, your IP. We are your custom manufacturing partner, not your design critic.
