Competent 20 Oz Copper PCB Manufacturer in China

Excel with 20 Oz Copper PCB from PCBMAY

High-density interconnects and high-speed demands in circuit boards are here to stay. To adapt to these requirements, you need PCBMay’s 20 Oz Copper PCB as a component for your devices.

• All products undergo strict QC to ensure impedance control
• Achieve an ideal signal-to-noise ratio with our PCBs
• Filled Via, Castellation, Press-fit & Microvia capability
• Request for advanced dielectric materials (Rogers, Ventec, NanYa, etc.)
• PCB suitable higher amperage devices and designs

At PCBMay, we recognize the importance of product design for this sophisticated type of PCB. Our in-house expert engineers will receive your PCB schematic and drawings, analyze the information, and assist you with whatever you need. Because we value your input, any Engineering (EQ) questions about your 20 Oz Copper PCB will be answered quickly (1-2 hours).

In fact, we are very transparent with our PCB manufacturing process. If you want to have a full CAM report, that can be easily arranged. As well, we will facilitate third-party audits to ensure your PCBs are up to the highest standards. We do not want you to worry about faults or defects. You want peace of mind when your 20 Oz Copper PCB arrives at your doorstep, and this, we will provide.

About environmental care, you are protected with our international certifications. As a responsible manufacturer in the electronics sector, we provide lead-free and mercury-free PCB products. When we ship to European customers, for example, our 20 Oz Copper PCB unquestionably follows the EU directive on the Restriction of Hazardous Substances (RoHS).

As you see, we can handle all types of PCB orders. Do you have any PCB needs other than our 20 Oz Copper PCB needs? Then, contact PCBMay now!

20 Oz Copper PCB: Ultimate FAQ Guide

Are you searching for a high-quality 20 Oz Copper PCB?

20 Oz Copper PCB is utilized for high-speed and high-frequency applications. Consequently, the PCB must be durable.

It is difficult for a manufacturer to maintain such high levels of quality.

PCBMay can be your one-stop solution. We are producing 20 Oz Copper PCBs with the utmost attention to detail.

We hope that this FAQ guide will answer any questions regarding this kind of PCB and share our experiences with you.

What Is 20 Oz Copper PCB?

20 Oz Copper PCB are produced 20 ounces of copper metal per layer. 20 oz Copper PCBs are typically utilized in commercial items.

20 Oz Copper PCBs are commonly used in electrical & electronics circuits where large power transfer is required. Moreover, the thermal strength given by these PCBs is excellent.

Copper Weight is the quantity of copper (measured in ounces) contained in one sq foot of surface area. It is shown by this parameter how thick the copper is on the layer as a whole.

The temperature range is critical in many applications, particularly electronic components. Heat damages sensitive electrical parts and harms the operation of electronic circuits. This is where the 20 oz Copper PCB distinguishes itself from the rest of the board.

20 Oz Copper PCB

What Are The Features Of 20 Oz Copper PCB?

The 20 Oz Copper PCB is distinguished from several distinguishing characteristics by the remainder of the PCB. They can withstand higher temperatures and can be utilized in more demanding applications.

The following are some of the characteristics of 20 Oz Copper printed circuit boards:

Base material: FR4

Min. Core thickness: 4mil/0.1mm

Max board size: 24.41X47.24inch/620X1200mm

Min. Base copper: 1/3Oz

Max. Base copper: 10Oz

Finish: ENIG

FR4 Material

What Are The Differences Between A Regular PCB And A 20 Oz Copper PCB?

A 20 Oz Copper PCB is significantly different from a conventional PCB. The following comparison might help you decide which one to choose if you are confused.

• Copper etching, as well as plating, is used to make standard PCBs. These PCBs’ traces, PTHs, planes, and pads are coated to increase their copper thickness.
• Only 1 oz copper is needed to produce standard PCBs. On the other hand, 20 Oz PCB, also known as heavy copper PCB, has a copper concentration of 20 ounces each layer.
• 20 Oz copper is better suited for heavy-duty tasks than standard PCBs.
• 20 Oz copper circuits conduct more current than standard copper PCBs.
• High-end applications benefit from thick copper PCBs because of their excellent heat dispersion.
• The mechanical strength of heavy copper PCBs is superior to that of conventional PCBs. You can get an increase in performance by using thick copper circuit boards.

Regular PCB Vs. 20 Oz Copper PCB

What Is The Production Process Of Double-Sided 20 Oz Copper PCB?

The manufacturing procedure for 20 Oz Copper double-sided PCBs is relatively complicated. You have to keep a few things in mind before going on. In this part, we will look at the manufacturing process for the 20 Oz Copper PCB, which includes the following steps:

• Cut the sheet in half to retrieve the internal structure board.
• A design for the inner layer is created on each internal structure board.
• The prepreg pushes together the internal board and the outermost section of copper foil to create a multi-layer board out of the two layers of material.
• Using current technology, post-process the multi-layer circuit to create a copper board.

These approaches also guarantee that copper is distributed uniformly across each layer.

Double-Sided PCB

What Are Different Copper Thicknesses Used In PCB Manufacturing?

Copper is a critical component of a printed circuit board. Copper has the advantage of being very conductive, which is why it is used in PCBs. This implies that it can readily convey signals without causing any power to be lost in the process. It also means that producers will not utilize as much copper as otherwise.

The amount of current passing typically determines the copper thickness of a printed circuit board through it. Copper thicknesses ranging from 1.4 mm to 2.8 mm (for inner layers) and weights ranging from 2 oz –3 oz are average (including the outer layers).

The thickness may be customized to meet your specific needs. Bear in mind that more significant copper equals a higher price as well as more difficult extraction and processing. So that’s why 20 Oz Copper PCBs have such excellent performance and command such a high price.

PCB Copper Thickness

What Is The Current Carrying Capacity Of 20 Oz PCB?

Copper traces etched onto the surface of a PCB convey electricity. You can increase the current load capacity by widening copper traces, although this is not usually possible.

Other than increasing the copper trace width, using ’20 Oz Copper PCBs’ can boost the current-carrying capability without altering the copper trace width.

A typical 20 Oz Copper PCB can transfer around 50-60 amps current. Use a PCB weight calculator to measure your PCB current according to the copper weight.

I=0.048* T^(0.44)* (W*Th)^0.725   

Where T= the rise in temperature.

Th = Copper trace thickness in mils

W = copper trace width in mils

I = current

The ultimate 20 Oz Copper PCB has a copper trace that conducts current. As per the formula for power loss, the current will disperse heat. Defined like this: Losses increase proportionally to trace resistance. To reduce heat dissipation, the trace should be broader and thicker.

By transferring the heat created by the trace to the surrounding components through “Heat Conduction” and the residual heat through “Heat Convection,” the trace eventually cools down. It is possible to disperse heat created into the atmosphere by various methods.

As a result of heating elements, cooling fans, blind vias, and PTH, heat may be readily transferred to thermal pads and subsequently dissipated in the air via heat sink fins. To maintain the long-term viability of a PCB, heat management must be taken into account throughout the design process.

PCB Current Carrying Capacity

Which Surface Finish Goes Into 20 Oz Copper PCB?

Copper must be protected from oxidation for high-level application performance by a PCB surface finish of 20 Oz Copper. A smooth surface finish is required for a reliable connection between the printed circuit board and the electrical component.

Surface treatments such as HASL and ENIG are used on 20 Oz copper printed circuit boards to ensure maximum performance. You will learn all you need to know about HASL and ENIG surface finish in this section.

PCB Surface Finish

HASL

Hot Air Solder Leveling (HASL) is a famous industrial finish. There are two forms of HASL: tin containing lead and tin lacking lead. HASL is one of the most affordable PCB surface treatments. This surface treatment is widely accessible and inexpensive.

A board is dipped in molten solder to make HASL.

The solder contact and storing stability of HASL are excellent. Surface planarity may not even be appropriate for fine-pitch parts due to the thickness of the HASL covering.

HASL may work effectively with through-hole components. The HASL technique exposes the PCB to heat up to 265°C, identifying possible delamination concerns long before pricey components are mounted to the board.

ENIG

ENIG comprises two parts of a metallic surface formed on the metal substrate using a chemical process.

The nickel layer shields the copper from corrosion, while the gold layer shields the nickel coating from oxidative stress.

This significantly improves corrosion resistance while preserving a smooth surface, critical for installing leadless parts and other components. Because of the responsibility for lead-free laws, the use of ENIG has grown more popular.

What Are The Applications Of 20 Oz Copper PCB?

Among the many advantages of 20 Oz Copper PCB are its excellent characteristics. Aerospace and military industries often make use of this PCB type. Over time, the need for 20 Oz Copper PCBs has grown. These PCBs are utilized in a variety of applications, including;

• Traction systems for railways
• Power backup systems (PBS)
• Converters for solar power
• Nuclear power companies
• The automotive sector
• Torque drives
• Electric motors
• Welding machines and supplies
• Military gear
• Signals and safety measures
• Relay protection

PCB Application

What Are The Design Issues Of 20 Oz Copper PCB In Aerospace Applications?

Traditional aerospace and military PCB design involve paralleling layers of 20 Oz copper and hoping that the layers divide the current equally.

In actuality, the load distribution is less than perfect, and specific layers tend to bear a more significant proportion of the weight and create more losses than others. In general, the board operates at a higher temperature than was anticipated throughout the design process.

It is now possible to determine the temperature increase caused by losses in the boards with better accuracy. Failures connected with thermal stress are significantly reduced because of the thick copper plating inside the holes. The result is a PCB that runs more relaxed and is more dependable.

Aerospace PCB

Does 20 Oz Copper PCB Handle Temperature And Strength Better Than Regular PCB?

Copper PCBs weighing 20 Oz of copper are commonly utilized in industrial electronic power systems. This unusual copper PCB has a final copper value of 20 ounces, contrasted to 1-ounce copper or 2 ounces in standard PCB.

PCB Heat Management

20 Oz Copper PCBs are thicker, allowing for greater current flow, better heat dispersion, and more complicated switches in a small area. Others include the ability to employ unusual materials with maximal capacity and the lowest danger of circuit failure.

This video explains PCB heat management.

How Many Layers Can 20 Oz Copper PCB Have?

Multi-layer printed circuit boards (PCBs) are frequently utilized in various devices because of their flexibility. Multiple circuits and wiring may be accommodated on a circuit board with more layers, handling more complex applications. For instance, since mobile phones are very complicated gadgets, printed circuit boards might include as many as twelve layers.

A 20 Oz Copper PCB might contain anything from one to thirty layers. These layers are responsible for ensuring that they operate at peak performance. The greater the number of layers, the higher its performance.

Multilayer PCB

How Can You Calculate PCB Thickness?

Copper thickness is crucial in obtaining the conventional PCB thickness for a PCB’s operation and application. Its weight is generally expressed in ounces (oz). It is accomplished by uniformly distributing an ounce of copper across a square foot surface, resulting in a thickness of 1.37 mils.

20 Oz  Copper is used to produce printed circuit boards (PCBs). Manufacturers also use it to estimate the thickness of a design whenever the architect does not provide particular specifications.

For currents that need more than 1 Oz of copper, a producer might increase the copper weight or the trace width. Copper’s price has risen, although this is largely due to the more difficult and time-consuming nature of refining heavy copper.

To get the thickness of 20 oz, just multiply the thickness of 20 oz by 4.

1.37 mil x 20 = 27.4 mils = 20 oz

PCB Thickness

What Are The Benefits Of A 20 Oz Copper PCB?

There is a lot to like about 20 Oz Copper PCBs. It has several distinguishing characteristics which make it a great choice for high-end operations. Let us have a look at some of the advantages of this PCB:

Exceptional thermal dispersion

The copper-plated vias provide high heat resistance on this PCB. 20 Oz Copper PCBs are utilized in applications that need high speed and frequency. You may even use this PCB in a freezing environment.

Mechanical sturdiness

Copper printed circuit boards provide exceptional mechanical resilience. When this PCB is utilized, it increases the durability and robustness of the electrical system.

A competent conductor

20 Oz Copper boards are excellent conductors of electricity. This characteristic allows them to be used in the construction of electrical devices. They aid in the linking of numerous message boards. These circuit boards can transport current.

Onboard heat sink

An onboard heat sink is provided via thick copper boards. Using these boards, it is possible to create efficient heat sinks for mosaic surfaces.

Exceptional dissipation factor

Copper PCBs with a thickness of 20 oz are appropriate for significant components with a substantial loss of power. Overheating in electrical systems is prevented by using these printed circuit boards (PCBs). They are good at dissipating excess heat.

Exotic materials support

Copper is beneficial in protecting and enhancing exotic materials. When developing electrical components, it is occasionally necessary to employ exotic materials.

Extreme temperatures may necessitate the use of an unusual material. Using large copper boards to eliminate circuit failures is possible because they entirely use an exceptional material.

What Are The Testing Methods Of A 20 Oz Copper PCB?

The 20 Oz is a high-quality product that should not result in the failure or recall of your final product, which would result in a loss of money for you. Even the most straightforward board may have problems, and if it is not well tested, it can be quite costly to a corporation in terms of both time and money.

The earlier in the product’s life cycle that faults or concerns are identified, the less probability of incorporation or field failure.

The following are the 20 Oz PCB testing methods:

Inspection by sight

An expert inspector must do visual inspections to establish what is appropriate and not. Visual inspections may suit the board’s aesthetic or visual appeal, and a single person can perform them to ensure that everything is in order.

Slight imperfections in the solder mask might lead to the breakdown of a previously fine-looking circuit board.

Automatic Optical Inspection (AOI)

AOI captures a picture of the circuit with the help of a vision system. Picture faults are discovered by comparing the image to an anticipated image and a collection of design principles.

Electrical Examination

An electrical inspection is the most widely used approach for determining if a PCB is in excellent or poor condition. If you want to put an electronic board through an electrical test, you must put it in physical touch with measuring equipment. There are two sorts of tests that are carried out: continuity and isolation.

Continuity testing ensures that the pads, traces, and holes are connected in a continuous route or with a suitable connection.

Isolation testing determines whether traces are segregated or isolated.

PCB Testing

This video explains PCB testing.

Is There Any Way To Ensure The Thickness Consistency Of A 20 Oz Copper PCB?

The use of copper should be divided as equally as feasible across your design, as a general guideline. Although this is not always achievable, it is essential to consider this when designing the layout. Not just in terms of the PCB plating thickness on every layer but also how the copper is dispersed throughout the layer.

There are two ways to guarantee that copper is distributed evenly across the layers of a PCB.

High Definition Interconnect Method

Arrange the traces to optimize copper flooding while preserving appropriate inter-trace spacing. As the forms are built up, it will be simple to mark ground vias around their peripheries.

Micro-vias used during HDI building are tiny and only cover the layers required to connect the local ground surfaces to the generic ground planes.

When a PCB uses HDI technology, there is a purpose. If you are going to use fine-pitch geometry, you will have a technological driver on your board at all times.

Although they were designed for more popular solutions, micro-vias may be used as via-in-pad solutions for more extensive power and pins.

If you have micro-vias, use them to your advantage. A microvia is always quicker than a through-hole via. While there are more as they go through the panel one by one, the procedure is well recognized and reasonably trustworthy.

HDI PCB

Plated Through-Hole Board

PCB fabrication typically has to be kept low-tech because of budgetary restrictions.

In terms of reliability, plated through-hole (PTH) is the most often used fabrication method. Our cars and rockets are typically equipped with it, and it is not uncommon to discover it beneath the hood. Although the cost of PTH boards has decreased, they have a long way to go in terms of market penetration.

Every via traverses every layer, and it is simple to generate too many thermal routes or faraday cages using vias. There is a risk that the high density of stitching vias may impede power flow and connectivity.

How To Choose The Best 20 Oz Copper PCB Manufacturer?

China has steadily become the world’s largest producer of printed circuit boards. Between 2010 and 2020, China’s worldwide share of PCB production value increased from 32.18 percent to 49.36 percent.

A large portion of the worldwide PCB manufacturing capacity is in Asia, particularly in China. While China is becoming the world’s top PCB manufacturer, it boasts one of its most excellent PCB manufacturing capacities and product varieties.

PCB Manufacturer

Many issues, such as shorts, open circuits, destructive etching, and significant cosmetic scratches, will overwhelm you, and a slew of matters such as delays or defaults will follow, so it is critical to grasp and master how to pick a dependable PCB manufacturer.

• Take a close look at the factory’s location and production capacity:
• Check out PCB circuit board providers’ reputations
• Concentrate on the expertise of PCB manufacturers.
• Pay close attention to the quality inspectors who are experts in their field.
• Consider if the delivery time can be assured before making a purchase.

Conclusion

Making a 20 Oz Copper PCB is a difficult task. There are several aspects to take into account before moving on with production. For such a delicate PCB, you should always go with an experienced manufacturer.

PCBMay is one of China’s leading PCB manufacturers. We have been producing 20 Oz Copper PCBs since 2008, and we have always been the best. If you have any queries about this PCB, do not hesitate to contact us.