Fastline Circuits Co., Limited is one of the most reliable manufacturers and suppliers of double-sided flex pcb in China. We are committed to providing high quality customized service to global clients. If you're going to wholesale advanced double-sided flex pcb made in China, welcome to get quotation from our factory.
Product Introduction
Double-Sided Flex PCB is a flexible circuit board with conductive copper traces on both sides, connected through plated vias. It offers higher routing density and more design flexibility compared to single-sided flex PCBs, while still maintaining excellent bendability and lightweight structure.

FastlinePCB provides reliable double-sided flexible PCB manufacturing with precise alignment, stable via connection, and consistent quality control. We support both prototype and mass production to meet different project requirements.

Double-sided flex PCBs are widely used in consumer electronics, wearable devices, medical equipment, cameras, automotive electronics, and compact industrial products where space-saving and flexible routing are required. We also provide PCB assembly and turnkey manufacturing services for complete solutions.



Product Parameters (Specifications)
|
Item |
Manufacture Capability |
|
Material |
FR4, Polyimide / Polyester |
|
Counts |
Flex: 1~20L; Rigid-Flex: 2~22L |
|
Board Thickness |
Min.0.05mm; Max. 0.3mm |
|
Copper Thickness |
1/3 oz - 2 oz |
|
CNC Drill Size (Max) |
6.5mm |
|
CNC Drill Size (Min) |
Flex: 0.15mm |
|
Holes Location Tolerance |
±0.05mm |
|
Coverlay Drill Size (Min) |
0.6mm |
|
Min Line Width / Spacing |
0.1mm |
|
Copper Thickness on Hole Wall |
Flex:12-22μm |
|
Min Pad Size |
φ0.2mm |
|
Etch Tolerance |
Finished line width tolerance ±20% |
|
Pattern Registration Tolerance |
±0.1mm (Working Panel Size: 250*300mm) |
|
Coverlay Registration Tolerance |
±0.15mm |
|
Solder Mask Registration Tolerance |
±0.2mm |
|
Solder Mask to PAD |
Non photosensitive: 0.2mm |
|
Min. Solder Mask Dam |
0.1mm |
|
Misregistration Tolerance |
±0.30mm |
|
Surface Finish |
Plating Ni / Au ; Chemical Ni / Au ; OSP |
Customer visit




Factory


Lead time&Packageing
|
Item |
Sample Lead time |
Mass production lead time |
|
Single sided PCB |
1~3 days |
4~7 days |
|
Double sided PCB |
2~5 days |
7~10 days |
|
Multilayer PCB |
7~8 days |
10~15 days |
|
PCB Assembly |
8~15 days |
2~4 weeks |
|
Delivery time |
3-7 days |
3-7 days |
|
Packing |
Electrostatic bag, Foam, Knife card, bubble pack, Carton |
|
Delivery & Shipping
FastlinePCB uses FedEx as the primary carrier for international shipments to ensure speed and reliability. Customers may also choose to ship using their own courier account or arrange pickup through their own freight forwarder if needed.



After-Sales Service
FastlinePCB provides structured after-sales service backed by a 12-month warranty. If any product defect caused by manufacturing is identified within this timeframe, our engineering team will evaluate the situation and provide repair, replacement, or technical support accordingly.
FAQ
Q1: What determines PCB pricing?
Cost depends on design complexity, materials, quantity, and process requirements.
Q2: Are prototypes more expensive than mass production?
Yes, prototypes usually have higher unit cost due to setup.
Q3: Does order quantity affect price?
Yes, larger quantities reduce per-unit cost significantly.
Q4: Is PCBA pricing separate from PCB fabrication?
Yes, PCB and assembly are quoted separately.
Q5: Do you offer discounts for long-term customers?
Yes, we provide better pricing for repeat or long-term cooperation.
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