Heavy copper flex PCB for maximum reliability
$23.50
MOKOPCB offers high-quality heavy copper flex PCB, which can handle high current loads while maintaining excellent flexibility. These flex circuits feature thicker copper thickness, typically 3 ounces or more. You can find that heavy copper flex circuit boards are popular in applications demanding high current capacity and precise thermal management. At the same time, the flexible structure makes them more easily integrated with complex or constrained spaces.
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Layer Counts | 2L |
Base Material | Polyimide |
Board Thickness(mm) | 0.4 |
Max board size(mm) | 570*1200 |
PCB size tolerance | ±0.3mm |
Min. Hole Size | 0.1mm |
Min. Line Width | 8mil |
Copper Weight | 3oz |
Surface Finish | ENIG |
Certificate | UL, RoHS, ISO, and REACH |

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Questions & Answers
1.What is your lead time?
Prototype orders typically take 1–3 days, while mass production requires 7–15 days, depending on the order volume and design complexity.
2.Do you comply with RoHS compliance?
Yes, we do. All our manufacturing processes and materials fully comply with the RoHS directive.
3.Why use heavy copper flex circuit boards?
The extra copper thickness allows the PCB to transmit more current, which is critical in industries that require high power transmission.
4.What copper thickness range is available for heavy copper PCBs at MOKOPCB?
MOKOPCB offers copper thickness options ranging from 0.5 to 5 oz to meet various current-carrying and thermal performance requirements.
5.What are the common base materials used in heavy copper PCBs?
Heavy copper PCBs typically use FR4, Aluminum Base, Rogers, and PolyImide(PI) as substrate materials, depending on the application’s electrical, thermal, and mechanical requirements.