Thick Copper Circuit Boards Preferred for High Current & Power
Heavy Copper Printed Circuit Boards
What is Heavy Copper Printed Circuit Boards?
In the circuit board industry, the copper thickness of the final PCB surface finish will be 2oz. This board is known as thick copper board. The majority of boards have a copper foil thickness of 35um. This primarily depends on PCB use and signal voltage/current size. Some PCBs with high current requirements will have a copper thickness of 70um or 105um. There will infrequently be 140um, etc.
Due to the increased thickness of the copper circuit board, the board can conduct a larger current, accomplish good heat distribution, and implement complicated switches in confined places. Additional benefits include greater mechanical strength at the connection points, the possibility of producing a reduced product size by integrating many weights on the same circuit layer, and the ability to use exotic materials with maximum capacity and minimal circuit failure risk.
Series of Heavy Copper PCB
1 oz Copper Thickness
2oz Copper Thickness
4 oz Copper PCB
The Features of Heavy Copper Printed Circuit Boards
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.
PCB Copper Thickness Chart For Tolerance
Fabrication of Heavy Copper Printed Circuit Boards
Techniques for Producing Heavy PCBs
For the fabrication of heavy copper PCBs, manufacturers employ a variety of approaches.
This approach fabricates heavy copper PCBs with a smooth surface utilizing embedded copper. Here, the copper is infused into the prepreg resin. Copper thickness is determined by the thickness of the resin.
For example, the fabricator starts with a 6-mil laminate and a 1-oz copper clad. The copper-clad is then coated with photoresist. A 5-micron laser beam is then utilized to carve the circuit layout from the laminate’s side. Through the laminate, the laser must cut to the copper foil. By controlling the laser, the fabricator can prevent copper foil damage.
The fabricator places the laminate into an electroplating tank. After filling the laser-cut groove in the laminate, the copper plating has a thickness of approximately 6 mil.
The blue bar method entails the insertion of thick copper bars onto circuit boards. This process conserves material and decreases the PCB‘s weight. During the fabrication process, the resin flows into the spaces between the copper traces, so facilitating the creation of a uniform surface.
When it comes to multilayer boards with heavy copper layers, fabricators must pay attention to the amount of copper fill between inner layers. Low amounts of fill and resin can result in a lack of resin.
Industrial Application Using Heavy Copper PCB
- Solar power converter
- Overload relay
- High-power rectifier
- Power converter for railway electrical system
- Safety and signal system
- Traction converter for railway application
- protection relay
- Excitation system of voltage stabilizer
- HVAC system
- Nuclear power applications
- Weapon control system
- Power supply of radar system
Heavy Copper Printed Circuit Boards Capability
| Base Material | FR/4 all TGs, Aluminum, Ceramic, Teflon, Polyamide, Copper |
|---|---|
| Copper Thickness | 4 Oz – 10 Oz |
| Soldermask | Red Oil/Green/Blue/Black/White |
| Surface Finishing | Immersion Gold, OSP, and HASL |
| Outline | Punching, Routing, V-Cut |
| Min Panel Size | 20mm *20mm |
| Min Number of Layers | 1 |
| Finished Thickness | 0.5 –4.0 |
| Minimum Soldermask Clearance | 10 MIL |
| Minimum Solder Dam Width | 5.5 MIL |
| Vias | Blind and Buried Vias |
| Holes | Minimum Drill Bit Hole Size: .012ʺ Maximum Hole Aspect Ratio = 10:1 |
| Controlled Impedance | +/- 10% |
| Minimum Silkscreen Line Width | 8 MIL |
Trustworthy Heavy Copper PCB Manufacturer
Your Qualified Thick Copper PCB Manufacturer
XFDC-PCB has over 20 years of experience fabricating and assembling a wide range of PCBs, including rigid, flexible, rigid-flex PCBs,HDI PCB. Regardless of how simple or complex your requirement is, our cutting-edge equipment and expert team are well-equipped to handle it. When you collaborate with us, you gain access to a wealth of industry best practices that will give you an advantage. We are dedicated to providing quick turnaround times so that you can get to market as soon as possible. Our clients appreciate the fact that we provide prototype quantities as well as large production runs with the same unwavering focus on quality. You can also rely on us for turnkey services and be confident that you will receive high-quality results.
Copper Circuit Board Application
Heavy Copper PCB for Military/Defense Application
The Multilayer PCB for Medical &Beauty Applications are usually high-tech boards, such as HDI circuit boards, flexible circuit boards, and rigid-flex PCBs. What’s more, they have via’s plugging with resin epoxy and plating over.
Welding equipment manufacturing
The Multilayer PCB for Medical &Beauty Applications are usually high-tech boards, such as HDI circuit boards, flexible circuit boards, and rigid-flex PCBs. What’s more, they have via’s plugging with resin epoxy and plating over.
Automobile industry
The Multilayer PCB for Medical &Beauty Applications are usually high-tech boards, such as HDI circuit boards, flexible circuit boards, and rigid-flex PCBs. What’s more, they have via’s plugging with resin epoxy and plating over.
Aerospace
The Multilayer PCB for Medical &Beauty Applications are usually high-tech boards, such as HDI circuit boards, flexible circuit boards, and rigid-flex PCBs. What’s more, they have via’s plugging with resin epoxy and plating over.
Computer
The Multilayer PCB for Medical &Beauty Applications are usually high-tech boards, such as HDI circuit boards, flexible circuit boards, and rigid-flex PCBs. What’s more, they have via’s plugging with resin epoxy and plating over.