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Heavy Copper PCB Manufacturing service

High-quality, quick-turn heavy copper PCB fabrication services.

High-Quality Heavy Copper PCB / Thick Copper PCB

If you keenly follow the electronic industry’s latest trends, you might have heard of heavy copper PCBs. They have found their way into various applications because of their numerous benefits. Though they are a bit expensive to fabricate, their value exceeds the expenses. 

Thick copper PCBs have finished copper weights of over 4oz (140μm), compared to the 1oz (35μm) and 2oz (0μm) copper weights typically found in standard boards. The extra copper thickness allows the PCB to carry more power, establish high thermal circulation, and perform complex switches in a small space. 

MKTPCB is several miles ahead of other PCB service providers in providing a wide variety of thick copper PCBs. These boards are available in different ranges and models as per the industry standards and customer specifications. Our products undergo a rigorous quality inspection process to guarantee the delivery of defect-free PCBs.

High-Quality Heavy Copper PCB / Thick Copper PCB
Why Choose MKTPCB for Your Heavy Copper PCB Products

Why Choose MKTPCB for Your Heavy Copper PCB Products

MKTPCB is a full-service turnkey PCB manufacturer that handles everything from prototype to full-production to assembly. We have been manufacturing high-quality heavy copper PCBs for more than ten years.

Besides, we are fully compliant with ISO, IPC, and RoHS standards. Our standard circuit boards are IPC 2 compliant, and we conduct a thorough internal quality inspection to ensure that our final products are of the highest quality standards.

We fabricate thick copper PCBs that are within your budget range. You can order a few prototypes to assess your design before placing a high-volume order. This will save you time and resources. We will send you a free online heavy copper PCB quote upon request; hence, you will figure out what to expect and plan accordingly. Our team of professional experts also offers technical support at every production stage.

Our customer support team will process your inquiries within the shortest time possible. Our customer satisfaction rate stands at 99%. If you doubt this, try to make a standard PCB order today.


Our Heavy Copper PCB Manufacturing Capacities

MKTPCB is a specialist in heavy copper PCB fabrication. We design and manufacture high-quality thick copper PCBs at competitive market prices. We utilize copper weights of up to 15oz (525μm). The table below contains some of our primary heavy copper PCB capacities.

Quality Grade
Standard IPC 2
Number of Layers
2 – 24 layers
Order Quantity
No MOQ requirement
FR4-Standard Tg 140°C, FR4-High Tg 170°C
Board Size
0.6 mm -6.5 mm
Max External Layer Copper Weight (Finished)
Max Internal Layer Copper Weight
Min Track / Spacing
For External layers:4oz Cu 9mil/9mil 5oz Cu 11mil/11mil 6oz Cu 13mil/13mil 12oz Cu 20 mil/32 mil 15oz Cu 32 mil/40 milFor Internal layers:4oz Cu 8mil/12mil 5oz Cu 10mil/14mil 6oz Cu 12mil/16mil 12oz Cu 20 mil/32 mil
Solder Mask Sides
As per the customer specification
Solder Mask Color
White, black, green, red, blue, yellow
Silkscreen Sides
As per the customer specification
Silkscreen Color
White, Black, Yellow
Surface Finish
HASL – Hot
Air Solder Leveling
Lead Free
HASL – RoHS ENIG – Electroless Nickel/Imm
ersion Gold – RoHS
Min Annular Ring
Min Drilling Hole Diameter
Extra Techniques
Gold fingers, Blind/Buried vias
Fly Probe Testing, AOI testing, E-test testing.
Build Time
2 days – 5 weeks


Our Heavy Copper PCB Quality Inspection Procedure

At MKTPCB, we are obsessed with quality, and we always aim for a flawless design and functionality of our thick copper PCB products. We have laid out a 5-step quality inspection procedure to ensure our products are 100% functional:

Our customer support team will process your inquiries within the shortest time possible. Our customer satisfaction rate stands at 99%. If you doubt this, try to make a standard PCB order today.

First Article Inspection (FAI)

MKTPCB acknowledges FAI as the initial step of quality inspection before the mass production of circuit boards. We put up this step to avoid producing large quantities of defective products due to processing and operational issues.We inspect every resistor, capacitance, and inductance using an LCR meter. Besides, we use QC with BOM and Assembly drawing to verify chips.

Automatic Optical Inspection (AOI)

The AOI process verifies the placement of electronic components and solder joints after SMT. The primary objective is to get the highest quality control and detect and remove defects in the earlier stages of the assembling process.

X-Ray Inspection

In this step, we use short wavelengths of 0.0006-80nm to penetrate various PCB materials. Designs with BGA and QFN packages have solder joints that are not easily visible by human eyes. We employ X-ray machines to inspect such packages in the final printed circuit board assembly.

Final Quality Assurance (FQA)

After carrying out FAI, AOI, and X-Ray inspections, our quality engineers conduct the last visual quality inspection process for all products. This process ensures that products have gone through all the assembling processes and are of good quality.

Function Test

Finally, we also conduct functional tests on all automated test equipment to simulate different loads, typically average, peak, and abnormal loads. This is a complicated process that involves various tool-based and programming tests. Additionally, this step requires customer technical support.

Contact Us for High-Quality Heavy Copper PCB Manufacturing Services

MKTPCB remains committed to providing the best quality heavy copper PCB manufacturing services – both prototype heavy copper PCB manufacturing and high volume heavy copper PCB manufacturing at competitive market prices.

This commitment has helped us emerge as the trusted and reliable provider of standard PCB fabrication services in China. We have an experienced team of experts and a state-of-the-art infrastructure that guarantees high-quality products in a quick turnaround.

Contact Us for High-Quality Heavy Copper PCB Manufacturing Services

No matter what your budget is, we have options available for you. For high-volume heavy copper PCB orders, we offer discounts. We are always available via telephone, email, and chat to discuss any of your questions or concerns. We make high-quality heavy copper PCBs for you and strive to ensure you are satisfied with our services.

Are you interested to know more about our thick copper PCB manufacturing services? Are you in need of prototypes or high-volume heavy copper PCB manufacturing services at fast turnaround times? Kindly request a free online quote now. Our heavy copper PCB manufacturing services run 24/7 to meet strict deadlines. Our customer support also provides quick responses to our customers.



What is Heavy Copper PCB

Though there is no standard definition of heavy copper PCB, any board with three or more ounces in the inner and outer layers is classified as a heavy copper printed circuit board. All boards with a copper thickness of more than 4oz per square foot are also grouped under this category. 

With the rapid development of the electronic information age, the demand for advanced boards, such as high-power and large-current server power, has rapidly grown. More importantly, these power PCBs must have high-heat resistance and heat distribution capacities.

Thick copper PCBs are divided into three classes: single-layer thick copper PCB, double-layer thick copper PCB, and multilayer thick copper PCB.


Applications of Heavy Copper PCBs

Heavy copper boards display a high elongation performance and are not limited by the working temperatures. They are commonly used in hot-melt welding equipment and severe corrosive atmospheric conditions. Below is a comprehensive list of thick copper PCB applications.

Benefits of Heavy Copper PCBs

Reliable performance and good thermal dissemination are the main factors driving the high demand for thick copper boards. The modern printed circuit boards are designed to conduct high current, meaning a lot of heat is generated. But, thick copper PCBs help to disseminate the generated heat quickly. This ensures the optimum performance of a product.

If you still doubt the advantages of thick copper boards in your particular application, you can consult an experienced electrical engineer or a reputable PCB service provider like MKTPCB. We will explain everything to you and advise you on designing the best thick copper PCB products.


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