1 oz copper PCB

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What materials are usually used in 1OZ pcb?

1oz copper thick PCBs are made from some effective materials. These materials are the key factors for their incredible functionality. 1oz copper thick PCBs are made from high quality copper.

The conductivity of copper is the best way to maintain high current flow while controlling ohmic resistance. Compared to other PCB materials, this material is more cost effective.

Tin alloy is used on 1oz copper PCBs. The alloy maintains the recommended thickness of copper circuit board, 1oz copper thick circuit board substrate along with flame retardant material. In addition, polytetrafluorocarbon. Epoxy resin and microfiber are the basic materials of 1oz circuit board.


What's the difference between 1oz pcb and 2oz pcb?

Design is actually to consider the amount of overload, and bear the overload current is the line cross-sectional area, the same line width design, the thicker the copper (i.e., 2OZ thicker than 1OZ) can carry the greater the current.

However, the thicker the copper, the higher the production cost, so if you can increase the line width to meet the overload requirements, should not be a thin line width of thick copper line design (the thinner the line, the more difficult to produce).

The actual unit of 1oz is oz/square foot. It is 1 square foot of copper foil weight 28.35g, the state of the area (generally we consider the thickness). This is the definition of 1oz. Multiplied by a multiple, 2oz is twice the size of 1oz. 1oz is 35 microns, 2oz is 70 microns.

What is the advantage of 1oz pcb?

Current-carrying capacity: 1oz circuit boards have the performance to optimize current-carrying capacity, and its high conductivity set can facilitate the transmission of signals. The standard 1oz copper board can play a role in transferring the generated heat to the heat sink.

Functionality: 1oz circuit boards offer extreme functionality, which is compatible with a large number of complex circuits as well as a wider range of time operations.

High temperature decomposition: decomposition values over 270 degrees Celsius ensure great thermal resistance.

Endurance: it can maintain consistent performance under different thermal states.
Low price: Its standard thickness provides high current-carrying capacity.


Your Best 1 oz copper PCB Partner

1oz copper PCB

1 oz Copper PCB

We are a professional 1 oz copper PCB design supplier in China for over 10 years of experience. We render our valued customers the very great products at the most affordable pricing. Venture can also supply other design that is related to 1 oz copper PCB like:

  • 2 Layers 1 oz Copper PCB
  • 1 oz Copper PCB Single-Sided
  • PCB with 1 oz Copper Thickness
  • 20 Layer Communication 1 oz Copper PCB
  • FR4 1 oz Copper PCB
  • 1 oz Heavy Copper PCB

1oz copper PCB

Your Leading 1 oz Copper PCB Supplier in China

Venture 1 oz copper PCB is manufactured for different circuit board use. We are a professional 1 oz copper PCB manufacturer in China for over 10 years. Venture 1 oz copper PCB has outstanding implementation and durability. These copper used as an alloy. It combines the advantage of standard internal layer copper thickness for standard construction products.

Venture 1 oz copper PCB is standard starting copper weight on the external layers for PCBs with the 2 oz completed copper weight selection. It has a process involves pressing the copper into a flat. Venture 1 oz copper PCB is widely used in different industries. You can use our 1 oz copper PCB for printed circuit board and etc. Also, use conveniently our 1 oz copper PCB into different uses.

Venture has a main 1 oz copper PCB supplying design capacity, we can fabricate hundreds of 1 oz copper PCB every day with our automated production line, so you will always have enough 1 oz copper PCB even in peak days.  We have some sets of multiple 1 oz copper PCB manufacturing lines and in the 1 oz copper PCB fabrication facility. Whether you are in need of a 1 oz copper PCB design distributor, retailer, or a custom 1 oz copper PCB design factory, Venture is always your most reliable choice because we can always provide your requirements.

We offer our valued customers the very great products at the most affordable pricing. We will give you the one-stop solution for all your 1 oz copper PCB demands. Any type of 1 oz copper PCB, contact Venture, we will provide you the best 1 oz copper PCB design solution, order or no order, we’re always happy to help your business.

Venture is the only supplier design that offered lots of related choices such as 1 oz copper PCB. We will help you with customizing your 1 oz copper PCB orders. Venture is experienced in sales industries, we also provide an online services website for your online sourcing. So you can buy and update your PCB products and supplies. Because Venture keeps every buyer up to date with our latest product trends in this fast-moving PCB design industry.

If you are in need of a 1 oz copper PCB feel free to contact us for assistance.

1 Oz Copper PCB: The Ultimate FAQ Guide


In this guide, you’re going to learn everything about 1 Oz copper PCB.

Whether you want to learn about the copper thickness, limitations, cost, space requirement or assembly process, all that information is here.

Let’s get started:

What is 1 Oz Copper PCB?

1 oz copper PCB is an identity describing the thickness of a standard copper printed circuit board.

It is the thickness achieved when an ounce of copper is made into a uniform sheet of the square foot size.

The 1 oz copper PCB is the standard PCB construction.

Thick copper pcb

Thick copper PCB

How Thick is 1 Oz Copper PCB?

The thickness of 1 oz copper PCB is about 1.37 mils (thousandths of an inch).

In other measurement values, it corresponds to about 0.00137 inches, 0.0347 millimetres, or 34.79 micrometres.

What is the Major Limitation of 1 Oz Copper PCB?

1 oz copper PCBs are limited to the amount of current that they can conduct.

When you need large current conductivity for your PCB design, you need to use more copper ounces per square foot.

You can also increase the width of the copper trace on the board.

The board size is, however, affected since larger widths require a more board space.

As a result, the number of components to be placed on the board will be greatly reduced.

Are 1 Oz Copper PCBs Expensive?

Compared to other thicknesses, 1 oz copper PCBs are the cheapest.

These printed circuit boards utilize the least amount of copper per square foot construction.

You find the cost of constructing a PCB increases with increasing copper thickness.

One obvious cost centre is due to the increase in the amount of copper used.

You also find that manufacturing thicker weights of copper is more sophisticated.

Sophistication is an upward cost pusher.

What is the Space Requirement for 1 Oz Copper PCB Traces?

 Trace in PCB

 Trace in PCB

You find that the minimum space between traces in 1 oz copper PCB is set at about 0.127 millimetres.

However, you find that larger spacing is favoured to allow easier etching process.

Etching of a board with tight spacing requirements has increased difficulty.

Why is 1 Oz Copper PCBs Produced in Arrays?

Production of 1 oz copper printed circuit boards in arrays allows for cheaper production.

When made in arrays, carrying out the assembly process automatically is simplified.

1 oz copper board can be easily picked and placed by robotic arms.

Furthermore, you find placing of assembly fixtures such as rails and holes for tooling is easy with this approach.

Rails provide structural stability for the boards acting as frameworks.

They also allow the board to be accessed easily during assembly.

What are Tooling Holes in 1 Oz Copper PCB Assembly?

Tooling holes are holes drilled to the assembly line rail used to hold 1 oz copper PCB arrays in position.

Besides, the holes are not plated and are usually at least three millimetres in diameter.

These holes are used alongside fiducials.

Fiducials are spots on the assembly line used to align the board arrays for easy positioning.

These spots are smaller in diameter than the tooling holes and are usually made from copper.

What are some of the Arrays used for 1 Oz Copper PCB Manufacturer?

You will find two major array options for the manufacture of 1 oz copper PCBs.

Sometimes, a combination of the two arrays can be used to produce a more versatile product.

This is especially when the board design has both orthodox and unorthodox design features.

· Scored Array

A scored array allows the fabrication of boards with even margins with minimal wastage of material.

When used in the production of many board arrays, the scoring technique returns high-cost savings on material usage.

· Tab Routed Array

This option is suitable for 1 oz copper PCB design with irregular or unorthodox shapes.

Additionally, you find this array type useful when the board design includes the placement of fringe components.

Fringe components are placed at the extreme ends of the board.

Rather than a tight fit of boards, this array includes an allowance of about three millimetres in between.

You can also find extra holes drilled next to the tabs to make a mesh.

Assembly rails of a centimetre are augmented on all the edges.

This provides additional support.

How do you make a 1 Oz Copper PCB using Scored Array?

Using the scored array includes providing uniform finishes across the edges.

To carry out this approach entails the following measures.

While ensuring a tight fit of boards, assembly rails are placed on the boards.

These rails are placed at a distance of a quarter an inch on the two long parallel sides.

To perform a score, the emphasis is on the straight edges and cannot be done across the board.

Scoring can only be performed to a depth of no more than thirty per cent of the board’s size.

The result should be a straight outline for the board edges.

There will also be score marks of straight lines on both sides of the 1 oz copper PCB.

Separating the boards should be carefully done to avoid damaging the scored edges and the board.

Since the cut is not made through the whole board, separating the fixtures will require a little force.

You can smooth the edges further and remove excess material using a sander.

You can also insert breaks in your scores in a process called jump scoring.

This scoring technique can also be used instead of the tab routed array.

It costs more to make a jump while also considerably prone to point inaccuracies.

What is the Aspect Ratio of the 1 Oz Copper PCB?

The aspect ratio of a PCB defines the relationship between the thickness and drilled hole diameter of a 1 oz copper PCB.

It is provided by dividing the thickness by the diameter.

The aspect ratio is useful during the plating of the holes for connectivity purposes.

Low aspect ratios are favourable since they allow for a simplified plating process.

A large aspect ratio results in considerable difficulty in the plating process.

Do 1 Oz Copper PCBs have Vias?

Yes, there are.

Vias are present to provide connective conductivity between layers of 1 oz copper PCBs.

They are located in drilled holes and are available in three types.

We have the through vias, the blind vias, and the buried vias.

The through vias is only available on a double board 1 oz copper PCB providing connection between the two board sides.

Besides, the blind and buried vias are only present in multilayer 1 oz copper PCBs.

Both the blind and buried vias offer interconnections between layers.

However, the buried vias are limited to the inner layers of the 1 oz copper PCB.

The blind vias connect an inner layer to the surface layer.

Types of vias

Types of vias

Why is Vias Important in 1 Oz Copper PCBs?

You find that using vias for the 1 oz copper PCB allows the attachment of more electronic components.

Moreover, vias allow the component count without the disadvantage of having to larger board size.

With this intervention, you find the miniaturization of devices possible.

However, using vias comes at a great financial cost.

While you eliminate the use of multiple layers with increased board sizes, extra effort is needed to implement vias.

You find costs associated with making 1 oz copper PCBs with vias are higher compared to those without.

How is Impedance Controlled in 1 Oz Copper PCB?

Regulating the impedance values of a 1 oz copper PCB is pivotal to the success of the PCB in the area of application.

This is true when designing 1 oz copper PCBs to be used in applications where speed is essential.

High power applications are also susceptible to impedance values.

Controlling impedance assists in minimizing the occurrence of deflections of signals.

You also find that impedance control mitigates the distortion levels for PCBs used in speed applications.

To control impedance, the 1 oz copper board has to be rigged to a specific value limit.

To establish the required impedance value on a 1 oz copper PCB, due consideration has to be made for the material properties.

Of utmost importance is the dielectric property.

The dielectric constant and weight of the copper layer will be useful in impedance value calculation.

Furthermore, the number of layers will also affect the impedance value.

When different impedance values are desired for particular traces, necessary attention will be accorded to the respective layers.

What are Countersinks and Counterbores in 1 Oz Copper PCB?

Countersinks are angular insertions on the copper board that allows for the removal of burrs when holes are drilled.

Apart from the angular aspects of the countersink, the diameter of the hole is also important.

Some countersinks can be plated to provide connective paths.

Counterbores are straight, flat cylindrical depressions.

These holes can be screwed and also plated.

The diameter of the hole is specific to the application and so is the depth.

You will, therefore, find different hole characteristics for counterbores on different boards.

Why is Immersion Popular in Finishing 1 Oz Copper PCB?

 1 oz copper printed circuit board

1 Oz copper PCB

You will find immersion finishes with various element compositions.

White tin, silver, and gold are some of the element s used in the immersion-style finish.

Gold, particularly when used with electroless nickel is most preferred.

Silver immersion follows in popular use with white tin option finding seldom use.

The gold and nickel immersion finish is a two-layer finish that is done chemically.

A nickel layer is first applied over the copper trace before coating it with gold.

The nickel layer is thicker than the gold layer.

The gold layer combines with the nickel molecules on the surface resulting in a very smooth finish.

The popularity of the gold immersion can be attributed to the following:

  • In this finishing technique, you find that solderability levels are impressive
  • The finish results in a smooth surface
  • The smooth finish is not easily tarnished
  • The longevity of this finishing style is extended
  • The nickel underneath provides structural support for the holes
  • The nickel also serves as a protective coating for the copper trace during soldering
  • You can have multiple reflows

However, despite the strengths mentioned, gold immersion is an expensive procedure.

Also, nickel has low tensile strength easily succumbing to mechanical strains.

What are other Finishes used for the 1Oz Copper PCB?

There are many finishes to choose from for the 1 oz copper PCB.

You can select a particular finish based on different parameters.

Cost, speed, shelf life, solderability, flatness, and standard compliance can influence your choice.

Some of the options include:

· Tin/ Lead Solder

This finish type involves the immersion and removal of 1 oz copper in solder.

Superfluous solder is extracted via blowing over the surface with air jets.

The solder material is typically a tin-lead compound.

About two-thirds of the solder is tin with the rest consisting lead.

This finish type is admired for its low cost and ability to be soldered many times.

However, you find this finish type limited to wider trace spaces.

Additionally, due to the hazardous nature of lead, its use is subject to environmental body regulations.

· Lead-free Solder

This is virtually a tin/lead solder finish minus the lead.

The 1 oz copper PCB is immersed in the solder and removed before being blown over by air jets.

While it consists almost entirely of tin, additional elements are included by manufacturers for certain desired properties.

Lead-free finishes provide smoother finishes than leaded solders.

However, this finishing option suffers a similar limitation to the tin/lead option.

Employing this finish to PCBs with close trace tolerances is unfavourable.

· Organic Solder Preservative

With the organic solder preservative, you find its major function is to coat the copper trace against oxidation.

The finish related to the organic solder preservative is very thin diffusing upon completion of the soldering process.

The organic solder preservative has a reduced cost factor and a smooth finish.

You also find this option allows bonding via wires while offering a good solder base.

Contrarily, you find its usage demands are high.

This finish type requires a variety of flux types with different assembly.

Moreover, the organic solder preservative is sensitive to touch due to its thin finish.

A light touch can unmask the copper underneath resulting in its oxidation.

How are Plated Holes made in 1 Oz Copper PCB?

Plated holes are specialized holes made close to the board ends and made conductive by plating them with copper.

These holes are made to a diameter of at least 0.5 mm.

Another aspect related to the plated holes is the distance between successive holes.

Holes should be no less than 0.6 mm apart.

A computer numerical control machine is used in the drilling of a plated hole.

The machine offers precise drill holes based on the board design.

Besides, the holes are plated by copper that can be inserted by robotic arms.

To prevent damage to the copper plating, the copper is typically extended outside the holes and flattened around.

This creates a firm hold for the plating to the board.

What are 1 Oz Copper PCB Specifications?

You find the following standard specifications for a 1 oz copper PCB.

  • Copper layers of 1 oz weight
  • Final board thickness of about 1.6 millimetres
  • A lead-free soldered plating finish
  • A solder mask on both board sides commonly in green colour
  • Markings providing board information
  • Industry compliant material usage such as FR – 4

What is the Role of the Solder Mask in 1 Oz Copper PCB?

A solder mask is a polymer-based layer applied over the copper pattern on the PCB.

You find usage of solder masks prevalent in mass production of 1 oz copper boards where soldering is carried out automatically.

The mask is commonly green in colour but other colour options are available.

The solder mask has two major roles:

  • To prevent the oxidation of the copper
  • To inhibit the formation of solder bridges over the trace patterns

A solder bridge is a conductive path that is formed between traces or solders unintentionally.

It has a ball-like formation usually resulting from the soldering process.

What Materials are used in Making Solder Masks for 1 Oz Copper PCB?

The material used to make solder masks depends on the application needs of the PCB.

Some of the materials used include:

  • Epoxy liquid
  • Liquid photo-imaginable ink
  • Dry-film photo-imaginable solder mask

The epoxy liquid is the cheapest of them all and is laid via silk-screening.

Besides, the liquid photo-imaginable mask can also be layered by silk-screening or spraying.

For the dry-film mask, lamination that is done at the vacuum level is used to lay the mask on the PCB.

After layering the mask, a curing process is carried out to emphasize the pattern.

The curing process can either be induced by temperature variations or UV radiation.

Further development is then carried out to establish the parts to be soldered.

How do you Test 1 Oz Copper PCB?

Testing of a PCB is paramount to determine whether it meets the design specifications.

Additionally, you can establish whether the board is functionally reliable or not.

For a 1 oz copper PCB, the common test methods are the bare board test and the loaded board test.

The bare board test is carried out on a board that is yet to have components assembled on it.

Also, the test attempts to unearth short circuits and open circuits.

It is also used to determine the total connectivity of the 1 oz copper board.

Testing a bare board is necessary due to the complex board structure characterized by many vias and increased board density.

Furthermore, when a board is to house several components, the chances of board failure are highly increased.

In testing boards before assembly, the chance of failure is greatly reduced.

When an untested board fails, the resulting cost in the loss obtained is of great value.

Consider such a loss when the board consists of multiple layers and houses several components.

A loaded board test is a test carried out on a populated board, which is typically after assembly.

The loaded board test attempts to establish manufacturing defects and functional reliability of the board.

It also examines the reliability of interconnected components.

The loaded board test can help you determine whether related connected components are executing functions as intended.

Consider a memory system composed of flash memory and an independent controller.

What are the Quality Standards for 1 Oz Copper PCB?

Some of the quality standards for the 1 oz copper board include the following:


The standard provides for how to assess the quality of 1 oz copper board.

The assessment is specifically for single-sided or double-sided boards with unplated through-holes.


This standard identifies soldering processes with high reliability.

These processes are for both surface-mounted 1 oz copper boards and those with mixed approaches to component mounting.


The standard centres on the immersion silver finish for 1 oz copper PCB.


This standard guides the process of designing and printing copper circuits on the 1 oz copper PCB.


With this standard, guidelines are provided for dual structured connectors with defined grid dimensions for 1 oz copper PCB.


A standard for testing methods for 1 oz copper PCB.


The standard provides for the design and use of 1 oz copper printed boards and assembly processes.

It guides the attachment procedures for the different component array packages such as ball grid.

With this information, am sure you can choose a suitable 1 oz copper PCB.

At Venture, we design and fabricate the best quality printed circuit boards.

Contact us now for the custom solution on 1 oz copper printed circuit boards.

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