Your Outstanding 4 Oz Copper PCB Manufacturer and Supplier in China

SMTFAB is your trusted 4 oz copper PCB manufacturer in China, we can provide many types of 4 oz copper PCBs.

Provide a one-stop solution for your PCB requirement
Over 12 years 4 oz copper PCB manufacturing experience
Offer cost-effective 4 oz copper PCB
Certified with ISO and UL
24h quick-turn service for your prototype PCB
7/24 sales and engineering tech support

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Production Facility
Capabilities

Feature	Capability
Quality Grade	Standard IPC 2 and IPC 3
Number of Layers	2 – 40layers
Order Quantity	1pc – 1Million+pcs
Build Time	24H – 4weeks
Material	S1150G, S1165, S1000-2
Board Size	Min 55mm \| Max 500650mm
Board Thickness	0.4mm – 6.5mm
Copper Weight (Finished)	0.5oz – 10.0oz
Min Tracing/Spacing	3mil/3mil
Solder Mask Sides	As per the file
Solder Mask Color	Green, White, Blue, Black, Red, Yellow
Silkscreen Sides	As per the file
Silkscreen Color	White, Black, Yellow
Surface Finish	HASL – Hot Air Solder Leveling
	Lead-Free HASL – RoHS
	ENIG – Electroless Nickle/Immersion Gold – RoHS
	Immersion Silver – RoHS
	Immersion Tin – RoHS
	OSP – Organic Solderability Preservatives – RoHS
Min Annular Ring	4mil
Min Drilling Hole Diameter	6mil
Other Techniques	Gold fingers
Other Techniques	Blind/Buried Vias

Releted Some Other PCBs

Why Choose SMTFAB for Your 4 Oz Copper PCB

4 oz copper(140um or 56mil) PCB is heavy copper or thick copper or power PCB. If you are looking for a 4 oz copper PCB supplier, SMTFAB is your No. 1 choice.

SMTFAB has rich experience to produce 4 oz copper PCB because we have over 12 years of PCB manufacturing experience.

SMTFAB 4 oz copper PCB plays an important role in power supply products. We can manufacture it with custom size, different layers, surface finishes, and proper solder mask.

All types of 4 oz copper PCB are available in SMTFAB. It includes a single-sided circuit board, double-sided PCB, multilayer PCB, rigid printed circuit board, flexible circuit board, and rigid-flex PCB.

We have a full range of raw lamination in stock. What’s more, we always use high-quality materials in manufacturing 4 oz copper PCB.

As a leading 4 oz copper PCB manufacture and factory in China, SMTFAB makes effort to meet our customers’ all requirements.

You can use SMTFAB 4 oz copper PCB in different applications including medical devices, automotive, LED lighting, industrial control, measure equipment, and wireless.

There are over 500 workers in our facility and we have two shifts, it can meet your prototype, small volume, and a large volume of 4 oz copper PCB.

Typically, the Minimum trace width/space is 8mil/8mil when you design your 4 oz copper PCB.

When you need more information, do not hesitate to contact us.

4 Oz Copper PCB: The Ultimate FAQ Guide

4 Oz copper PCB is the heavy copper printed circuit board that is in high demand in the electronic industry. Due to the uniqueness of the 4 Oz copper PCB, it has a wide range of applications.

If you want to learn more about 4 Oz copper PCB, keep reading this article. This article will help you with your queries and increase your knowledge.

What is 4 Oz Copper PCB?
What is the Base Material of 4 Oz Copper PCB?
What is the Thickness of 4 Oz Copper PCB?
How many Layers does 4 Oz Copper PCB have?
How can you make 4 Oz Copper PCB?
What is the Survivability of 4 Oz Copper PCB?
What are the different Applications of 4 Oz Copper PCB?
What different Quality Control Tests you can Perform for 4 Oz Copper PCB?
What Surface Finish does 4 Oz Copper PCB have?
What is the Silkscreen of 4 Oz Copper PCB and what is its Color?
What is the Current Carrying Capacity of the 4 Oz Copper PCB?
What are the Benefits of 4 Oz Copper PCB?
What is the Difference between 2 Oz Copper PCB and 4 Oz Copper PCB?
How can 4 Oz Copper PCB Manage Temperature?
What is the Circuit Board Strength of 4 Oz Copper PCB?
What is the Purpose of using 4 Oz Copper PCB?
What are the Trace/Line Spacing and Hole-Size of 4 Oz Copper PCB?
Why Copper Distribution should be even in 4 Oz Copper PCB?
From Where can Obtain 4 Oz Copper PCB?

What is 4 Oz Copper PCB?

4 Oz copper PCB is a unique type of the printed circuit board. It uses heavy copper wire it.

They are high-density circuits. As a result, you do not have to solder from point to point.

The density of the 4 Oz copper PCB increases due to an additional layer, which is present in the printed circuit board.

In this layer, you can add different components of the 4 Oz copper PCB.

It has a great number of applications, especially for high-power current applications.

In the printed circuit board industry, you can express the weight of the copper wire in ounces (Oz).

The weight of the PCB is 4 ounces.

It has applications in higher technology electronics.

Apart from their simple and basic structures, they are very cost-effective.

In addition to this, the 4 Oz copper PCB is quite spacious which makes them very flexible compared to the other ordinary printed circuit boards.

The uniqueness of the 4 Oz copper PCB is that you can utilize both sides of the board and make it cost-effective.

A simple 4 Oz copper PCB

What is the Base Material of 4 Oz Copper PCB?

The base material of the printed circuit board is one of the most important aspects of the PCB.

The base material directly affects the functionality and the performance efficiency of the printed circuit boards.

The base material you can use in the manufacturing of the 4 Oz copper PCB is FR-4 standard at 140 degrees Celsius.

Moreover, you can also use High transition temperature material at 170 degrees Celsius.

The selection of the base material depends on the type of project you are working on.

It also depends on the complexity of the project.

With the variation of the base material, the properties of the 4 Oz copper PCB change.

Each base material has its own distinct properties.

If you compare FR-4 and High transition base material, the properties of the 4 Oz copper PCB with base material FR-4 have very much different properties than with base material High Tg.

However, the selection of the base material always depends on the requirements of the clients.

FR-4 as a base material for 4 Oz copper PCB

What is the Thickness of 4 Oz Copper PCB?

The thickness of the printed circuit board is highly crucial for its proper working.

The thickness of the circuit board directly affects its performance efficiency.

You need to have precision in the manufacturing of the 4 Oz copper PCB.

Therefore, the thickness of the printed circuit board is accurate.

The standard thickness of the 4 Oz copper PCB is 0.6mm to 0.65mm.

There is an additional layer in the configuration of the board where you can add different components.

In addition, the size of the board is may also vary according to the requirement of the project.

The standard board size ranges from a minimum of 6mm x 6mm and the maximum size is 467mm x 610 mm.

However, the thickness and size of the board depending on the complexity of the project.

Both the thickness and the board size of the 4 Oz copper PCB play an important role in its functioning.

In addition, you can always customize the size and the thickness of the printed circuit board according to the requirement of your client.

The thickness of the 4 Oz copper PCB

How many Layers does 4 Oz Copper PCB have?

The number of layers of the 4 Oz copper PCB plays an important role in its configuration.

You can use the number of layers according to the requirement of your project.

In general, the 4 Oz copper PCB has two layers or they can have multiple layers.

The simpler 4 Oz copper PCB has 2 number layers whereas the complex ones have multiple number layers.

The board is spacious and can accommodate different components.

In some 4 Oz copper PCBs, there is an additional layer to add more components.

If your project is simple and has application in simple electronics you can use double-layer 4 Oz copper PBC.

If your project is complex and has application in high-tech electronics, you are going to use multiple layers of 4 Oz copper PCB.

However, the standard number of layers is 2-24.

This can change according to the requirements of the clients.

12 layers 4 Oz copper PCB

How can you make 4 Oz Copper PCB?

The construction process of the 4 Oz copper PCB is a crucial step.

Precision should be the key element while manufacturing the circuit board.

The designers must make sure of good design and standard manufacturing.

Either standard 4 Oz copper PCB with a double layer or multiple layers, the manufacturing process uses copper etching or plating process.

You can start manufacturing the board by using thin copper foil sheets by etching them to remove excess copper.

You can plate them to add copper thickness to the pads, through-holes, planes, etc.

You can also increase the thickness of the 4 Oz copper PCB by increasing the number of layers.

You can also make a modern Power Link by mixing heavy copper with the standard features on a single board.

It has a great number of advantages, which include low impedance within the circuit, small footprints, cost-effectiveness, and reduction in the number of layers.

The manufacturing process of a simple 4 Oz copper PCB

What is the Survivability of 4 Oz Copper PCB?

By survivability, it means that the printed circuit withstands and continues to work even in unfavorable conditions.

The survivability of the 4 Oz copper PCB is very important. It must survive harsh conditions to continue working well.

The high-end designers can choose different types of materials for their manufacturing, which affects its survivability.

You can choose dielectric materials FR-4 or high-temperature polyimide.

FR-4 works at a temperature of 130 degrees Celsius whereas high-temperature polyimide work at a temperature of 250 degrees Celsius.

High temperature or extreme environmental conditions can affect the material of the 4 Oz copper PCB.

The printed circuit board industry has developed many methods through which you can check the integrity of the 4 Oz copper PCB.

You can also use a test known as TCT (Thermal Cycle Testing).

You can use this test to the resistance of the circuit as it goes through the temperature cycling from 25 degrees Celsius to 260 degrees Celsius.

The maintenance of the resistance is very important otherwise, it will crack up the copper wires.

What are the different Applications of 4 Oz Copper PCB?

The 4 Oz copper PCB is the unique type of the printed circuit board in the electronics industry.

Due to its uniqueness, it has a wide range of applications.

The modern printed circuit board industry uses it in high technology electronic devices.

It also has applications in the equipment of welding.

Power converters widely use 4 Oz copper PCB in their configurations.

Apart from this, electric power distribution systems, high technology space systems, high technology radar systems use it.

The 4 Oz copper PCB also has applications in the automobile industry.

In addition, the solar panel systems use this circuit board in their manufacturing.

You can also use 4 Oz copper PCB in the general power or electric supply systems.

All kinds of industries have control panels in them. There is a major role of 4 Oz copper PCB in industrial control panel manufacturing.

Vending machines are the modern type of electronic machines, and they have the use of 4 Oz copper PCB in them.

The different lightning systems, dashboards of the cars, and amplifier systems have this circuit board in them.

The different applications of 4 Oz copper PCB and PCB

What different Quality Control Tests you can Perform for 4 Oz Copper PCB?

The first step after you manufacture your printed circuit board is its quality checking.

There are many tests that you can use for the quality checking of the 4 Oz copper PCB.

One of the most important tests for quality checking is the DRC test.

DRC stands for design rule check.

This test has a number of rules that a designer can use to check all the configurations, schematics, manufacturing considerations, and dimensional tolerance of the 4 Oz copper PCB.

Apart from this, you can also use the FQC test. It stands for Final Quality Check.

In this test, you can check the performance of the circuit board at the final stage.

Moreover, you can use the electrical testing of the 4 Oz copper PCB. In this test, we make sure of the interconnectivity of the printed circuit board.

In addition, you can also use the automated optical inspection test.

In this test, there is a camera, which moves over the printed circuit board. This moving camera detects any kind of fault or failure present on the board.

You can use other quality control tests for 4 Oz copper PCB as well.

The automated optical inspection of 4 Oz copper PCB

What Surface Finish does 4 Oz Copper PCB have?

The surface finish is the coating of a material present between the component and that of a circuit board.

You can apply surface finish to make sure the tight soldering of the component on the board.

Another purpose of the surface finish is to protect the copper circuit present on the board.

It also protects the circuit board from oxidizing.

In the case of 4 Oz copper PCB, the major type of surface finish is Hot Air Solder Leveling (HASL).

It is a double layer metallic coating along with the nickel.

It is cost-effective and repairable.

Apart from this, you can use ENIG surface immersion. It stands for Electronic Nickel Immersion Gold.

The layer of gold present on it protects the nickel layer.

It is an expensive and more demanding type of surface finish. The printed circuit board industry is using it mostly.

Apart from this, you can also use lead-free HASL (Hot Air Solder Leveling)

All these surface finishes protect 4 Oz copper PCB from damages.

ENIG surface finish 4 Oz copper PCB

What is the Silkscreen of 4 Oz Copper PCB and what is its Color?

Silkscreen is the top layer of the printed circuit board.

You can use it as to indicator to place the components of the PCB.

Silkscreen requires different inks traces for components placement, warnings, logos, marks etc.

They also show the place where a specific component is present.

In the case of the 4 Oz copper printed circuit board, you can use a silkscreen of black, yellow or white color.

The silkscreen colors will give you an advantage while you are pricing it.

The purpose of the silkscreen is to get an out output of higher quality. This also helps with reliable results.

You can use it on different types of materials like banners, glass, electronics, wood, textile, and much more.

The silkscreen also helps to identify any failures present in the 4 Oz copper PCB.

Silkscreen addition on the printed circuit board is the last step of 4 Oz copper PCB manufacturing.

You can use it to specify any information on the printed circuit board.

The silkscreen of 4 Oz copper PCB

What is the Current Carrying Capacity of the 4 Oz Copper PCB?

The current carrying capacity of the printed circuit board is a very important aspect.

The current carrying capacity the determined before the manufacturing of the printed circuit board.

However, the current-carrying capacity depends on many factors. It depends on the size of the copper wire i-e their width and length.

In addition, it also depends on the physical and electrical properties of the material.

It also depends on its insulation and the environmental conditions present around it.

There are several equations through which you can calculate the current carrying capacity of the 4 Oz copper PCB.

However, the printed circuit must have a controlled current carrying capacity because it can raise the temperature of the circuit board.

Generally, when current flows through a circuit there is a power loss, which results in the rise of the temperature.

Therefore, you must determine the current carrying capacity of the trace and the estimate of the temperature rise that would result.

The 4 Oz copper PCB can bear only a certain temperature limit and you must consider it.

What are the Benefits of 4 Oz Copper PCB?

There are many benefits of the 4 Oz copper PCB. Due to which the printed circuit board is using it widely.

One of the major benefits of the 4 Oz copper PCB is that it is cost-effective and affordable.

It can increase the strength of the connecter sites and plated holes.

Another benefit is the high current carrying capacity of the 4 Oz copper PCB.

It has high thermal endurance, which prevents it from any circuit damage.

It has high mechanical and electrical strength.

It also has a smaller circuit size, which brings benefits in its working.

Due to its uniqueness, many industries like automotive industry, solar panel systems, power distribution system, military systems, radar systems, and space station system uses it.

You can use them in storage pumping plants, power line monitors, and safety and signals systems.

What is the Difference between 2 Oz Copper PCB and 4 Oz Copper PCB?

The major difference between the 2 oz copper PCB and 4 Oz copper PCB is the copper weights.

The weight of the copper in 2 Oz copper PCB is 2 ounces per square foot.

O the other hand, the copper weighs 4 ounces in 4 Oz copper PCB.

You can find many differences between the two copper board types.

The current carrying capacity of the 4 Oz copper PCB is comparatively very high to 2 Oz Copper PCB.

The thermal management is more precise in 4 Oz Copper PCB.

Similarly, the survivability of the 4 Oz is greater than 2 Oz.

4 Oz is more durable than 2 Oz.

Based on these differences, the 4 Oz have a greater number of applications in the printed circuit board industry due to its higher efficiency.

How can 4 Oz Copper PCB Manage Temperature?

By thermal management, it means controlling the heat flowing through the circuit.

Temperature management of any printed circuit board is the first thing you should consider.

Many factors are there that affect the thermal management of the PCB.

Extreme environment conditions, high power components, high circuit current call for the temperature management of the power board.

In the case of the 4 Oz copper PCB, a higher number of layers are present which makes it spacious.

Thermal management in this power board is very much controlled.

However, there is a high use of heat sinks in 4 Oz copper PCB to dissipate heat.

The heatsinks are of great importance because they take away excessive heat present in the circuit.

Therefore, preventing important components from overheating and damage.

You can use the heat sinks in 4 Oz copper PCB of copper or aluminum material.

Moreover, heat vias are also present.

In addition, you can add more copper to the heat vias, which results in the reduction of the heat resistance present in the circuit.

The heatsink for 4 Oz copper PCB

What is the Circuit Board Strength of 4 Oz Copper PCB?

The circuit board strength determines the ability of the printed circuit board to resist any electrical damages.

The strength of the 4 Oz copper PCB depends on the type of base material.

It also depends on the current-carrying capacity of the power board.

Moreover, the resistance and the voltage of the 4 Oz copper PCB affect its circuit board strength.

If there is an increase in the heat resistance of the 4 Oz copper PCB, it can crack up the copper wires.

You must make sure the maintenance of all these factors that affect the circuit board strength of the 4 Oz copper PCB.

What is the Purpose of using 4 Oz Copper PCB?

The major purpose of the 4 Oz copper PCB is to mechanically support and electrically connect different components.

Due to its great properties, the printed circuit board industry uses it in high-tech electronic devices.

It has a great number of applications in different industries like the PCB industry, automotive industry, high technology space systems, electric power distribution systems, , radar systems, and satellite systems.

What are the Trace/Line Spacing and Hole-Size of 4 Oz Copper PCB?

The line spacing means the distance between the line to line and line to pad distance.

The minimum line spacing of the 4 Oz copper PCB is 10 mil (0.25mm) to 12 mils (0.3mm).

This is the distance between the wire and the wire present in the power circuit board.

On the other hand, the through-holes are the holes that go completely through the board.

The minimum hole size of the 4 Oz copper PCB is 15.8 mil (0.4 mm).

Both spacing and the hole size play an important role in its functioning.

Why Copper Distribution should be even in 4 Oz Copper PCB?

You must distribute copper as evenly as possible throughout your 4 Oz copper PCB design.

It is very important to distribute it evenly because it is going to directly affect the working of 4 Oz copper PCB.

From Where can Obtain 4 Oz Copper PCB?

You can obtain 4 Oz copper PCB from one of the leading and most authentic company i-e SMTFAB.

It is a Chinese company with a record of high-quality services.

They are present in more than 60 countries and deliver products worldwide.

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