Polyimide flex circuits built for dynamic and static applications. From single-layer membrane switches to complex 6-layer flexible harnesses with stiffeners and coverlay.
Topfast manufactures high-quality flexible circuits on polyimide (PI) substrates. Our flex PCBs are used in smartphones, automotive, medical devices, and industrial equipment.
Simplest construction. Copper conductor on polyimide base with coverlay. Ideal for static applications and simple routing.
1 Conductor LayerTwo copper layers with through-hole vias. Suitable for more complex routing and limited dynamic flex zones.
2 Conductor Layers3-6 conductor layers with plated through-holes. For complex harnesses with controlled impedance and stiffener zones.
3-6 Conductor LayersUltra-thin display and battery connector flex circuits. Layer-to-layer alignment tolerances of ±0.05mm. Coverlay and stiffener construction for component mounting areas.
Replaces bulky wire harnesses with lightweight flex circuits. Temperature rated to 150°C, vibration resistant. IATF 16949 certified production.
Biocompatible materials, sterile packaging options. Flexible circuits for endoscopes, patient monitors, and wearable health devices.
3D routing between PCB sections inside compact enclosures. Eliminates connectors and cables. Reduces assembly cost and improves reliability.
Polyimide substrate
Casting & etching
LPI & cure
FR4 / PI / Alu
Electrical test
1 to 6 layers
12.5μm - 75μm
1/3 oz - 2 oz
50μm / 50μm
0.2mm mechanical
FR4, PI, Alu, Steel
Up to 150°C
IPC 6013 Class 2 & 3
Send your flex design files and requirements. We provide free DFM feedback and flex-specific stack-up recommendations.
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