A Thick Copper PCB, also known as a Heavy Copper PCB, is a type of printed circuit board that features copper traces and planes with significantly higher copper thickness compared to standard PCBs. While standard PCBs typically have copper thickness measured in ounces (e.g., 1 oz, 2 oz), Thick Copper PCBs can have copper thicknesses ranging from 3 oz to as high as 20 oz or more.

The increased copper thickness in these PCBs offers several advantages, making them suitable for specific applications where standard PCBs may not be sufficient:

High Current Carrying Capacity: Thick Copper PCBs are designed to handle higher currents and offer lower electrical resistance, reducing heat generation and power loss during operation. This makes them suitable for power electronics and applications that require high current-carrying capacity.

Enhanced Heat Dissipation: The thick copper layers act as heat sinks, efficiently dissipating heat from power components, thereby improving the overall thermal performance of the PCB.

Increased Mechanical Strength: The thicker copper layers provide additional mechanical strength to the PCB, making it more robust and resistant to mechanical stresses.

Reliability and Longevity: Thick Copper PCBs offer improved reliability and longevity, making them suitable for harsh environments and applications that require extended lifetimes.

High Voltage Applications: Thick Copper PCBs can handle higher voltage levels effectively, making them suitable for applications involving high-voltage circuits.

Thick Copper PCBs are commonly used in power electronics, automotive applications, aerospace, renewable energy systems (solar and wind power), and other industrial applications that demand high current handling, efficient heat dissipation, and reliable performance.

Designing and manufacturing Thick Copper PCBs require specialized fabrication techniques and equipment, and they may cost more than standard PCBs due to the higher copper content. Additionally, extra care is needed during the drilling and plating processes to ensure accurate hole sizes and consistent copper distribution.

How to drill holes in thick copper pcb?

Drilling holes in a thick copper PCB (Printed Circuit Board) requires careful consideration and appropriate tools to ensure accuracy and safety. The process involves selecting the right drill bits, setting up the drilling equipment properly, and taking necessary precautions. Here's a step-by-step guide:

Materials and Tools Needed:

1.Copper PCB with a high thickness

2.PCB drilling machine (preferably a desktop CNC drilling machine)

3.Appropriate drill bits for PCB drilling (carbide or tungsten carbide drill bits are recommended)

4.Safety goggles and protective gear

5.Masking tape or PCB stencil to prevent scratches

6.Clamps (if needed) to secure the PCB during drilling

7.Vacuum cleaner or compressed air to remove dust and debris

Step-by-Step Process:

1.Choose the right drill bits: Use high-quality carbide or tungsten carbide drill bits specifically designed for PCB drilling. These bits are capable of drilling through the copper layers effectively.

2.Secure the PCB: If the PCB is large or heavy, use clamps to hold it securely in place on the drilling machine's worktable. Ensure that the PCB is level and flat.

3. Set the drilling speed: Adjust the drilling machine's speed to an appropriate level for the thickness of your copper PCB. Follow the manufacturer's guidelines for recommended drilling speeds.

4. Mark the drill points: Use a PCB design software to generate a drilling file or create a stencil for the drill points. Carefully mark the drill points on the PCB surface using a pen or marker.

5. Apply masking tape: To prevent scratches and damage to the PCB surface, apply masking tape over the areas where you will be drilling. This will also help in reducing copper burrs.

6. Start drilling: Carefully position the drill bit above the marked drill point and gently lower the drill bit onto the surface. Start the drilling process at a slow speed and gradually increase it to the desired speed. Allow the drill bit to do the work; avoid applying excessive pressure, as it may cause the drill bit to break.

7. Use a backer board: If you are drilling all the way through the PCB, place a backer board beneath the PCB to prevent burrs and damage on the opposite side.

8. Clean the drill bit: Occasionally, stop drilling and clean the drill bit to remove any built-up debris. This will ensure a cleaner and more precise hole.

9. Remove the masking tape: After completing the drilling, carefully remove the masking tape from the PCB surface.

10. Clean the PCB: Use a vacuum cleaner or compressed air to remove any dust or debris from the drilled holes and PCB surface.

Remember to take safety precautions throughout the process, wear appropriate protective gear, and work in a well-ventilated area. Additionally, it's essential to practice on a scrap PCB first to gain confidence and ensure that you have the correct settings and techniques for drilling thick copper PCBs.

If you are looking for a Heavy Copper PCB manufacturer, Ucreate offers complete solutions that you need for your PCB development.

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