Hard Gold PCB

  • Affordable Hard Gold PCB
  • Professional Quality Hard Gold PCB
  • Excellent Customer Service
  • Over 10 Years’ Experience

What Are The Properties Of Hard Gold PCB?

The most signifcant properties of hard gold PCB as belows:
1.Electrolytic deposition of gold on nickel&More than two thermal cycles
2.Shelf life is more than a year&Fair process controlling
3.Flat surface mount technology&Certifed by RoHS
4.Compatible with normal handling&Thin PCB surface fnish
5.The thickness of gold is around 30 to 50 microinches
6.The nickel layer is around 100 to 150 micro inches thick.

Properties Of Hard Gold PCB
Applications Of Hard Gold PCB

What Are The Applications Of Hard Gold PCB?

Some of its notable applications as belows:
1.Fine pitch surface mount technology
2.Small batch PCB productions like ball grid array and micro ball grid array.
3.Flip chips&PCB edge-connectors
4.Artifcial intelligence&Robotics
5.Joined career boards&PCB gold finger
6.Industrial equipment where useful wear resistance is required

What Is The Best Thickness Of Hard Gold PCB?

It offers immense benefts for edge connection. A proper dimension of hard gold PCB will make you the maximum result of using it.
The gold which is electroplated on the nickel layer is 98% pure and 23 karat. The best thickness of hard gold is around 30 to 50um. The nickel layer is around 100 to 150 um. You could maintain this range for thickness while designing hard gold PCB.


Best Thickness Of Hard Gold PCB

In PCB manufacturing, surface treatment is one of the most important processes. As a leading PCB manufacturer in China, we can offer you our one of a kind hard gold PCB.

Venture hard gold PCB consists of a layer of gold plated over a barrier coat of nickel. We manufacture hard gold PCB with excellent and advantageous features.

Our hard gold PCBs are extremely durable. They are widely used for high-wear areas such as gold fingers and keypads.

For your hard gold PCB needs, you can get benefits with our 10 years of manufacturing experience!

Your Leading Hard Gold PCB Supplier in China

Are you looking for the most trusted manufacturer of hard gold PCB? You are in the right place! At Venture, you can get benefits from our 10 years’ manufacturing experience.

Venture hard gold PCB is different from immersion gold. Their thickness varies by controlling the duration of the gold plating cycle.

Due to its relatively poor solderability and high cost, our hard gold PCB is not commonly applied to solderable areas.

With regard to the nature of this hard gold PCB, they join tape grip and thickness tests. Nonetheless, the cost of it needs strong process controls. The gold is only one all the more methods to enhance the user’s PCB sourcing background.

As a leading manufacturer, we can produce a hard gold printed circuit board with great benefits:

  • Firm
  • Tough surface
  • Extended shelf lifetime

At Venture, we strive to create a satisfactory, perfect, and new Venture series product. Depending on the market needs, we can expand a new high-class hard gold printed circuit board.

As a leading hard gold PCB manufacturer in China, we will be taking care of steady progress, brand strategy, and continuous innovation.

At Venture, we will provide high-efficiency and excellent quality service to our valuable customers at any time and allow you a carefree procurement process.

Through our 2 hours of rapid response services from our 24/7 sales and tech support team, and professional after-sale service, Venture will be your most trusted hard gold PCB manufacturer and supplier in China.

Please feel free to contact us anytime!

Hard Gold PCB: The Ultimate FAQ Guide


If you have any question on hard gold PCB, you will find the answer right here.

So keep reading to learn more.

What Is Hard Gold PCB?

Hard gold PCB

Hard gold PCB

It is an amalgamation of gold with other metals used in the production of Printed Circuit Boards (PCB).

It uses electroplating to coat gold over metals like nickel.

Why Use Hard Gold PCB?

It is durable since it has a low rate of absorbing moisture and a very high thermal resistance.

Besides, it has a long shelf life of more than one year making it adaptable to various projects.

Also, it is high resistance to corrosion which help to delay the rate of decay of copper surfaces.

It is lead-free which makes it friendly to the environment and compliant with the Resistance of Hazardous Substance (RoHS) directive.

The electron conduction is smooth which help in improving the efficiency of high-density circuits.

Besides, the hard gold PCB pads are flat to allow other features to be added to the surface area of the PCB.

It is highly functional since it increases the solderability of the PCB surfaces and allows the joining of edges.

Are There Limitations Of Using Hard Gold PCB?

Require extra manpower to process.

Additionally, it is costly to do hard gold plating.

It has little solderability since its maximum thickness for solderability is 17.8 µm.

How Do You Fabricate Hard Gold PCB?

Fabrication of hard gold PCB is the process of transforming your PCB design into a physical device.

Of course, while maintaining all the specifications of design as detailed or indicated in the design files.

This process is usually a combination of several steps as explained below.

Process The Substrate Material:

This step in the PCB fabrication is done through the saturation process for fibreglass.

Then passing the saturated fibreglass between rollers to give it the needed thickness and remove any excess material deposits.

Shape The Processed Substrate:

A thin layer of fibreglass is passed in an oven to strengthen it then it is cut into the desired shape and size.

Arrangement Of Other Sized Panel Layers:

Layer the panels to one another with a copper foil.

This is because of its adhesiveness and press the stacks of panels under a 1500 psi pressure.

You should maintain the temperature at 340 Fahrenheit for not less than one hour.

Drill Holes On The Stacked Panels:

Placing of holes on the panel is done using a numerically controlled machine at the designed positions as detailed during the design phase.

The holes are then plated by coating the inner surface of the holes with copper to make them conductive and non-conductive holes with non-conductive material.

Drilling holes on PCB

Drilling holes in PCB

Print The Desired Circuit Pattern On The Panel:

Either the substrate method or the additive method is used to print circuits on the panels.

For the additive method, you coat copper on the panel surface according to the desired diagram leaving the other areas uncoated.

The substrate method, on the other hand, coat the whole panel then remove the coating on the areas that are required to leave the designed circuit diagram.

Shield The Circuit Board Using Photoresist Material:

Then, panels are pressed over on their surface area by a layer of photo resistive material.

The panels are passed in a vacuum chamber to lay a coat of material that is photo resistive on the whole surface area of the panel.

Place a phot resistive mask on the printed circuit diagram and place it in ultraviolet rays.

Spray Alkyne:

After removing the mask, spraying alkyne on the panels helps in melting away any distorted photoresistors and exposing the copper foil.

Oxidation Prevention:

The exposed layer on the panel is coated with copper foil of about 1 to 1 microinches.

The copper foil coating acts as a cathode while the photo resistant an anode.

A tin-lead coating is then applied to prevent oxidation of the copper layer.

Board Completion And Preparation Of Mountings:

Attachment of contact fingers to the substrate’s edges is done to allow for the possible connection of electronic components to the PCB.

Tin-lead, nickel and gold are used to plate the contact fingers.

To prevent damages from occurring on the panel during installation, epoxy resin is used to seal it.

With the panels cut into designed sizes, the PCB is ready for mounting.

Mounting Components.

Electronic components such as resistors are mounted on the panel to activate it.

The design of each PCB is different from the other and uses different electronic PCB components.

PCB components

PCB components

Removal Of Remaining Flux

Water and some chemicals are used to remove any remaining photo resistive flux.

The chemicals are chosen depending on the type of solder used.


Shipping of PCBs is done only with bubble wrap or foam packaging to prevent them from miscellaneous damages.

Inspection Of Errors

Error inspection is important for quality control purposes.

A visual and electrical inspection is used to determine any errors that may result from automated machines such as wrong placement of components, excessive soldering, etc.

This inspection helps to identify such errors so that they can be solved appropriately.

Which PCB Software Can You Recommend for Hard Gold PCB Design?

Selecting a PCB design software to use can be a very tedious process.

The software used in the PCD does not vary very much when it comes to features.

After analysis of the different software available, Altium Designer 19 software is identified as the best software to use.

However, with every version update of the different PCB software, the technical difference in individual software becomes less and less with each newer version.

Other design applications that can be used include; Proteus software, Eagle software Kicad software and Dip trace software which are the most commonly used.

Regardless of the software used., you can get the desired result in the design of PCBs if you used any software optimally.

How Much Does Hard Gold PCB Cost?

Hard Gold PCBs are very costly-effective.

You can easily be required to cough up to $10 to acquire a single piece of Hard Gold PCB.

The price, however, may go up when a multilayer PCB is stack up with a Hard Gold PCB

You can purchase a required Hard Gold PCB of your choice at very affordable prices.

Where Can You Use Hard Gold PCB?

Hard gold PCB

Hard gold PCB

  • Flip-chip packaging technology.
  • Electronic devices keypads.
  • In robotics.
  • In artificial intelligence.
  • PCB gold finger
  • PCB production in small batches such as Ball Grid Arrays (BGA)

How Do You Test Quality Of Hard Gold PCB?

The tests for the quality of hard gold PCB are done by three most common tests namely; the flying probe test, universal grid test, and automated optical inspection (AOI) test.

Flying Probe Test

It is the least complicated of the three methods and does not require the use of additional fixtures.

In this test, several probes are placed at the final points of each conducting line.

Whereas this method will offer you a cost that is very low due to its simplicity in operation, it is time-consuming.

This is because it requires one to check all the terminal points in a PCB to ascertain its performance.

Flying probe test is most common in applications of hard gold PCB that have very high densities.

In cases where there is a need for mass production of hard gold PCBs, you must put into consideration the time required to test all the produced PCBs.

Universal Grid Test

It is only be used on high-density off-grid hard gold PCB production.

The Automated Testing Equipment (ATE) is a fixed grid with a huge needle plate mounting which is designed to conform with various portions of the hard gold PCB.

In this test, movables probes that are in the needle plates penetrate different holes of the hard gold PCB that are specific to each needle.

The holes are covered with a G10 material mask.

For you to be able to conduct a smooth grid test, you must supply the hard gold PCB with an electric potential of 250V.

Automated Optical Inspection (AOI)

It is a completely automated way that is used to test the quality of hard gold PCBs.

2D or 3D images of the hard gold PCB is matched with an ideal image of the PCB.

An algorithm in the AOI uses the pixel count method to identify the template of the PCB that matches the images provided.

Compared to other tests, AOI is cost-effective, reliable and uses less time to test hard gold PCBs.

This test is, therefore, the best method to test PCBs in a setting where mass production of PCB is done.

How Do You Choose Hard Gold PCB Solder Mask?

When selecting the solder mask that is to be used on hard gold PCB, you must consider a few factors in the selection process:

  • Applicable use of the PCB.
  • Size of the PCB.
  • Components that are to be attached to the PCB
  • Conductance of the PCB.
  • Surface finish used on the PCB
  • Layout of the PCB.

Which PCB Surface Finishes Can You Apply ON Hard Gold PCB?

Surface finishes contribute to the determination of quality, cost, ability to be manufactured and the reliability of the PCB produced.

Different types of surface finishes are used in hard gold PCB namely;

  • Hot air solder levelling (HASL)
  • Lead-free HASL
  • Electroless Nickel Immersion Gold (ENIG)
  • Immersion Silver
  • Nickel palladium
  • Organic Solderability Preservative (OSP)
  • Immersion Tin

Which Types of Vias Can You Use in Hard Gold PCB?

There are three types of vias, namely; buried vias, through-hole vias, and blind vias.

Types of vias

Types of vias

When choosing the right type of via in hard gold, you must put into consideration the absorption of contact force and the properties of wear resistance for the hard gold.

The through-hole vias restrain the mechanisms of hard gold and are therefore not used in hard gold PCB.

The buried vias are used to connect different internal layers of the hard gold PCB.

Internal and external layers are joined together by blind vias.

The buried and blind vias are therefore the only vias used in hard gold PCB since they don’t hinder the resistance of the hard gold to wear.

Do You Have Multilayer Hard Gold PCB?

PCBs are formed by the connection of three or more layers of PCBs.

The PCBs are laminated using prepregs and cores in between the insulating component to prevent the components from melting in case of excess heat.

The range of the most common multilayer PCBs is 4 layers to 12 layers

Which Features Should You Look For In Hard Gold PCB?

They are thin and lightweight to allow for the connection of a variety of electronic components in a confined space.

They are graphically accurate and repeatable to allow for equipment inspection, debugging and maintenance.

Ability to be produced automatically to minimize the cost of electronic equipment.

Is There Recommended Hard Gold PCB Thickness?

The recommended thickness is between 30 µm and 50 µm for hard gold and a nickel layer of 100 µm and 150 µm thickness.

How Do Drill Holes in Hard Gold PCB?

You drill holes on hard gold PCB using a numerically controlled machine.

The holes are drilled at the designed positions as decided during the design phase.

You also plate the holes by coating the inner surface of the holes with copper.

This is to make them conductive and the non-conductive holes with non-conductive material.

How Can You Assemble Hard Gold PCB?

Some of the assembly techniques include:

Through hole vs SMT component mounting

Through hole vs SMT component mounting

Surface Mount Technology (SMT) Hard Gold PCB Assembly:

Sensitive components such as diodes and resistors are mounted on the PCB automatically using a Surface Mounting Device (SMD).

The SMT assembly is done in four main phases.

PCB organization: solder paste is spread on the required parts of the PCB.

Component insertion: components are inserted in their respective positions on the PCB using a pick and place device.

Reflowing of the soldiers: the PCB is heated in the SMD.

This heating process happens in a reflow oven within the SMD at specific temperatures needed for solder paste until when the formation of solder joints occurs.

Inspection: this is done through the SMT process using the assembler.

Through-Hole Technology (THT) Hard Gold PCB Assembly:

This technology links components connected using lead or wires through-hole connections.

The components and the solder are on opposite surfaces of the board.

It applies to assemblies that use large components such as capacitors.

The process occurs in four main steps;

Drilling: holes of the right dimensions are drilled on the PCB to fit the components easily.

Lead placing: lead is placed on the PCB using the assembling device.

Soldering: after confirming that each component is in the right position, they are soldered on the opposite side to keep them intact.

Inspection: this checks the PCB to ascertain that the PCBA function is required.

Is There a Difference Between Hard Gold PCB And Gold Finger PCB?

The recommended thickness of gold in hard gold is 30 to 50 microinches while that of gold finger PCB is 2 to 5 microinches.

Gold finger PCB

Gold finger PCB

Had gold PCB

Hard gold PCB

Gold finger PCBs have a copper-free inner layering whereas hard gold PCBs have copper layer foil embedded at the centre of the substrates.

Hard gold PCBs have holes and soldering on the board while in gold finger PCBs there are no through holes or soldering in the circuit board.

How Do You Specify Hard Gold PCB For Your Project?

When selecting hard gold PCBs for any project, you must consider different factors during this process such as:

  • Size of the design.
  • Mechanical strength of the project.
  • The flexibility of the PCB to meet the project needs.
  • Weight of the PCB.
  • Thermal resistivity of the PCB.
  • Cost of acquiring or production of the PCB.
  • Design of its circuit.
  • An environment of operation.
  • Area of application.

Is Hard Gold PCBs Durable?

Hard Gold PCBs are very durable.

They have a shelf life of more than one year making them relevant in different projects.

Which PCB Material Do You Use For Hard Gold PCB Fabrication?

Some of the main PCB materials for hard gold PCB include:

  • FR-4 materials
  • Flexible laminate
  • Teflon laminate
  • Polyimide laminate
  • Cyanate ester
  • Ceramics
  • Blended networks

Which Types Of Hard Gold PCBs Do You Have?

Some of the most common options include:

Single-sided PCBs: PCB formed by a single layer of the substrate material.

Double-sided PCBs: PCBs formed by two layers of the substrate with holes drilled to connect one side of the circuit to the other.

Multilayer PCBs: PCBs formed by the connection of three or more layers of PCBs.

The PCBs are laminated using prepregs and cores in between the insulating component to prevent the components from melting in case of excess heat.

The range of the most common multilayer PCBs is 4 layers to 12 layers.

Rigid PCBs:  PCBs formed on a solid substrate that cannot be twisted e.g., computer motherboard which distributes power and provides a platform for communication between the other components.

Flexible PCBs:  PCBs formed on materials that can bend or move such as plastics thus cost more compared to other types of PCBs.

Rigid-Flex-PCBs: PCBs are formed by attaching many flexible circuits to more rigid circuit boards.

They are built on precision and are very light thus saving on space and about 60% of the weight compared to other PCBs

They are mostly used in medical and military devices.

High-Frequency PCBs: have a frequency of between 500MHz to 2GHz and are critical in high-frequency applications such as communication systems, microwave PCBs among other applications.

Aluminium backed PCBs: they are useful in high powered systems since aluminium is a good heat dissipator.

They provide high rigidity levels and low thermal expansion making them applicable in systems with high mechanical tolerance such as LEDs and powers supply systems.

Which Quality Standards Should Hard Gold PCB Comply With?

Hard gold PCB must comply with the UL 94 standard rating for flammability of plastics in electronic devices.

Hard gold PCB are rated as UL 94-0 which indicates that the flames will burn out in 10 sec with no drips of particles allowed.

Other important quality standards include CE and RoHS, amongst others.

How Does Hard Gold Plating And Soft Gold Plating Compare In Hard Gold PCB Fabrication?

Hard gold plating is an alloy of 98% pure gold and Nickel whereas soft gold plating does not have any other metals.

Hard gold is harder hence gives a better contact force absorption as compared to soft gold.

In terms of appearance, hard gold is brighter than soft gold plating.

The ability of edge-connection of hard gold plating is more effective.

Soft gold is more resistant to corrosion than hard gold plating.

Soft gold PCB is more solderable.

Does Temperature Change Affect The Working Of Hard Gold PCB?

For you to attain the maximum output on hard gold PCB, you must keep the temperature stable at all times.

Temperature variations affect the properties of a hard gold PCB.

The dielectric constant varies due to increased polar molecules movement that is a result of high temperatures.

When there is a rapid change in its dielectric constant, the overall efficiency of the PCB drops significantly.

Temperatures also result in loss tangent (the measure of signal loss due to the wildness of the electromagnetic energy in PCB).

More so temperature changes hamper the signal processing integrity since it is ineffective in thermal resistance maintenance.

Temperature also affects the degree to which the hard gold PCB is solderable.

Thus, making it hard to maintain constant layering of the gold coating since both gold and nickel have high thermal conductivity properties.

All the above, indicate that you have to maintain a constant temperature to promote the excellent performance of the hard gold PCB.

Can You Etch Hard Gold PCB?

Etching is done using a chemical solution whose concentration is known to improve the overall effectiveness of Hard Gold PCBs.

First, you must cover the portion of the Hard Gold PCB surface that you need.

Thereafter, you immerse the laminated area of the PCB in a ferric chloride solution that is up to standard to ensure that the etching is flawlessly done.

The solution then reacts with the uncovered area of the PCB surface.

The desired outcome can only be achieved when the gold coating over the nickel layer is kept intact during the process of etching.

Do Hard Gold PCB Require Electroplating?

Hard gold PCB is sometimes referred to as electroplated nickel-gold PCB.

This means that you must electroplate a layer of hard gold over a layer of nickel.

During electroplating, an electric current is used to coat one metal with a layer of another metal.

This is necessary since direct contact with copper and gold might result in problems like diffusion, electron displacement among other setbacks.

For this reason, a layer of nickel must be applied in between the gold layer and copper layer.

During electroplating, you must supply enough electric current to ensure that the layer of gold forms over the layer of nickel is solid and resistant.

Sometimes, it may require you to electroplate a layer several times to achieve the required hard gold PCB thickness.

What Are The Electrical Properties Of Hard Gold PCB?

Some of the main electrical properties include:

  • Dielectric constant
  • Dielectric loss tangent
  • Volume resistivity
  • Surface resistivity
  • Electric strength

For any questions or inquiry about hard gold PCBs, you can contact us now.

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