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Heavy Copper PCB

Heavy Copper PCB

heavy copper PCB 1.company information UNIWELL circuits co., lTD. was established in 2007 in Shenzhen, adjoining to Hong Kong with easy transportation and ideal location. We are a leading PCB manufacturer in China, we strongly focuse on quality, cost, and service, and experienced continuous...

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1.Product describe


Layer: 4  
Board Thickness: 1.6 mm
Surface treatment: immersion silver.
Material: FR4 TG170.
Min line width/line distance: 8/10mil
Copper weight: 105μm

Uniwell circuits has been building heavy copper circuit boards with traces and copper planes of up to 10 ounces for 10+ years. Our expertise is in producing at a reasonable cost, heavy copper PCB's that are of proven designs. Our engineering team can work with you to review your design to make sure that they can be manufactured with the highest quality at the best overall cost.

2.Company information
Uniwell circuits co., lTD. was established in 2007 in Shenzhen, adjoining to Hong Kong with easy transportation and ideal location. We are a leading PCB manufacturer in China, we strongly focuse on quality, cost, and service, and experienced continuous growth.Uniwell Circuits offers high-mix, low volume and quick turn PCB service. With a special market position and excellent corporate culture, we can provide "One-stop shop" service from 1 to 32 layers of PCB products, which includes Single&Double layers PCB, Multilayer PCB, Aluminum PCB (Metal core PCB) Flexible PCB (FPCB), Rigid-Flex PCB (Flex-rigid PCB), High Density Interconnect (HDI )PCB boards, heavy copper boards, buried Capacitance & resistance boards, as well. Our various products are exported to Europe, America and Asia. 

Now UNIWELL has formed the market development, the product research, the development, the production, the fully quality control system, we focus on quality, cost, service, and experienced continuous growth and succeeded in passing the certification of international quality systems as ISO 9001, UL and ISO14001 environmental quality system. We are expecting to be your long term partner in China.


3.Our advanced equipment




4.Heavy copper PCB capabilities 


FR4,CEM-3,Metal Core,

Halogen Free, Rogers, PTFE

Max. Finishing Board Size

1500X610 mm

Min. Board Thickness

0.20 mm

Max. Board Thickness

8.0 mm

Buried / Blind Via (Non-cross)


Aspect ration


Min. Drilling Size(Mechanical)

0.20 mm

Tolerance PTH/ Pressing fit hole /NPTH

+/-0.0762 mm / +/-0.05mm / +/-0.05mm

Max. Layer Count


Max. copper (inner/outer)

6OZ/10 OZ

Drill tolerance


Layer to layer registration


Min. line width/space


BGA pitch


Surface treatment

HASL, Lead free HASL,

ENIG, Immersion silver/Tin, OSP

5.Do you know about heavy copper PCB
Heavy Copper PCBs are printed circuit boards with 3 or more ounces of finished copper in the inner and/or outer layers.

How Are Heavy Copper PCBs Made?
Amitron utilizes a unique process referred to as “Laminated Deposition”. This combination of processes allows extreme copper thickness requirements to become very practical and cost effective. The process utilizes heavy base copper that delivers consistent and reliable high power circuits when placed in our plating and etching systems, allowing us to produce well-defined track edges, finer lines, and finer spaces. 

Benefits of Heavy Copper PCBs
● Elimination of complex wired buss configurations
● Increased current carrying capacity
● Increased endurance to thermal strains
● Optimized use of exotic high temperature materials with lower probability of circuit failure
● Ability to incorporate multiple copper weights on the same layer of circuitry (layer count reduction)
● Added copper plating in the heat vias (thermal resistance reduction)
● Selective areas plated with heavy copper can function as a heat sink or interface to cold plate (built-in heat sinks)
● Integration of high-current circuits and control circuits on a single PCB

Applications of Heavy Copper PCBs
Demand for heavy copper-clad circuits in automotive, computer, industrial controls, and military is growing very fast. More than 80% of the existing PCB manufacturers are limited or not capable of producing reliable heavy copper printed circuit boards.
● Solar power converters
● Safety and signal systems
● Renewable energies and storage pumping plants
● Torque controls
● High power rectifiers
● Overload relays
● Power converters for railway systems
● Power line monitors
● Traction converters for rail applications
● UPS systems
● Electric vehicle charging (commercial and industrial)
● Protection relays
● Excitation systems for power regulators
● Position control systems
● Power grid switching systems
● HVAC systems
● Energy storage and power grid back up
● Nuclear power applications
● Line reactors
● Hydro-electric plants
● Surge protectors
● Fuse blocks
● Welding Equipment
● Weapons control systems
● Radar systems

The driver behind the demand of copper PCBs is ever increasing power, performance, and cost requirements. Known in the industry as the PCB thermal management experts, Uniwell has been manufacturing PCBs with heavy copper plating since 2007 and we are capable of producing 10 ounces of finished copper and reliably spray coat a protective and consistent solder mask with imaged nomenclature. An extreme copper circuit could utilize 5 oz. in the hole walls and 10 oz. surface copper.

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