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GESP Technology

15+Years Devoted to PCB Solutions & Manufacturing

Heavy Copper PCB

Heavy Copper PCB


What is The Heavy Copper PCB?

Heavy Copper PCB is widely used in central power supply systems .and power electronic devices due to its ability to conduct larger currents in smaller product sizes. Generally, this unique type of heavy copper PCB features a finished copper weight of more than 4oz (140um), compared to the 1oz (35um) or 2oz (0um) copper weight generally found in those with a standard PCB copper thickness.

Hheavy copper pcb usa

Due to the additional thickness of the copper circuit board, the circuit board can conduct a higher current, achieve good heat distribution and implement complex switches in the smallest of spaces. Additional advantages include increased mechanical strength at the connection points, the possibility of achieving a smaller product size by integrating several weights on the same circuit layer and the possibility of using exotic materials with maximum capacity with minimal risk of circuit failure.

Heavy Copper Printed Circuit Boards Capabilites

Base MaterialFR/4 all TGs, Aluminum, Ceramic, Teflon, Polyamide, Copper
Copper Thickness4 Oz – 10 Oz
SoldermaskRed Oil/Green/Blue/Black/White
Surface FinishingImmersion Gold, OSP, and HASL
OutlinePunching, Routing, V-Cut
Min Panel Size20mm *20mm
Min Number of Layers1
Finished Thickness0.5 –4.0
Minimum Soldermask Clearance10 MIL
Minimum Solder Dam Width5.5 MIL
ViasBlind and Buried Vias
HolesMinimum Drill Bit Hole Size: .012ʺ
Maximum Hole Aspect Ratio = 10:1
Controlled Impedance+/- 10%
Minimum Silkscreen Line Width8 MIL
  • Reduced PCB size due to reduced wired bus configurations
  • Easy integration with high-power circuits and control circuits
  • Enhanced thermal resistance reduction by adding copper plating in the thermal vias
  • Reduced layer count due to ease of adding multiple copper weights on a single layer
  • Enhanced mechanical strength of PTH holes and connector areas
  • Thick copper sheet has features such as high current carrying. reduced thermal strain, and good heat dissipation.
  • Not limited by processing temperature, blowing oxygen when the melting point is high. and hot melt welding methods such as low temperature brittleness.
  • Thick copper sheet material is fireproof and is a non-combustible material.
  • Even in a very corrosive environment. copper sheet can form a strong, non-toxic passivation protection layer.

Benefits of Heavy Copper PCB

heavy copper PCB

Heavy Copper Printed Circuit Boards Application


Welding equipment manufacturing

Automobile industry

Solar power



Industrial control


Industrial Applications Using Heavy Copper PCB

ndustrial applications using heavy copper PCB

Solar power converter

Overload relay

High-power rectifier

Power converter for railway electrical system

Safety and signal system

Taction converter for railway application

GESP- Your Reliable Heavy Copper PCB Manufacturers

Finished Copper PCB Quality Control


GESP Technology has over a decade of experience in manufacturing . and assembling high-performance standard and heavy copper circuit board products. that help our customers achieve their productivity and profitability goals.
We make it a standard operating procedure for our highly qualified engineers. to carry out the design for manufacture on every circuit file . and to address all questions and concerns before production. This helps ensure that the finished electronic cards meet your performance expectations. Our competent employees include in-house quality control – we guarantee the quality of our circuit boards.
Note: To ensure we can fabricate your thick copper PCB correctly. it is important to take the greater width of traces and spacing. between the traces caused by the increased copper weight into consideration.


Get Custom Quotation Now

GESP Technology offers a wide range of solutions for the Heavy Copper PCB. We propose to meet your PCB needs and bring you a better compromise between technology and cost. If you have any HDI PCB related technical issues waiting to be resolved. or you are ready to start HDI PCB production. please send us your PCB files and production requirements. We will reply to you within 24 hours.
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