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Chemical Gold High TG PCB Products

High TG PCB One Stop Service Solution Provider-JarnisTech

JarnisTech is the leading one-stop solution provider of high-quality PCBs. From prototyping to large-scale manufacturing, you can purchase best quality High TG circuit board from us, and then we will provide competitive prices and professional technology services for our god(clients).

We offer a variety of high-quality PCB materials like RO4350B, RO4033C the RO4835, RO4533 and VT-47 and RO408, FR408…

For High TG PCB Manufacturing and Assembly, the Following Is Our Factory Capability:

● Engineering support one-on-one, and no-cost DFM, DFT, and DFX for high-tg projects.

● ISO, IATF, REACH, UL, RoHS, IPC-certified high-tg production and assembly of PCBs.

● One-stop-service solution that includes high-quality PCB manufacturing, PCB assembly and components sourcing.

● Rapid build time from 1 Day to 2 weeks. Speedy delivery in 3 days.

What Is TG ?

TG is a property of physics that defines the glass transition temperature, which is the temperature at where the material base (polymer or glass) changes from a glassy solid, rigid, solid state to a rubbery. When Tg is exceeded, the materials do not melt, but undergo structural changes, and change into a rubbery state.

What’s High PCB TG ?

If you work in the Printed Circuit Board industry, you might be familiar with a typical PCB FR4-Tg of 130-140℃, medium Tg is more than 150-160℃, and high-TG Printed Circuit Board is greater than 170 ℃.

And what is a High-TG FR4 PCB? There is term used to describe high temperature resistance FR4 PCBs , we call FR4 High-TG printed circuit board. It refers to the fact that the printed wiring boards have been designed to withstand extremely high temperatures. If the glass transition temperature (TG) is above 170°C, it is considered to be an FR4 high-TG PCB. High-TG FR4 is more durable in terms of chemical and mechanical resistance to moisture and heat than normal FR4. The greater the TG value is, the higher the resistance to temperature of the material, and so High-TG FR4 becomes more popular, especially in the high power sector.

JarnisTech Technology can provide many different High-TG FR4 FR4 materials that can be used for rigid Circuit boards, typical PCB materials with High-TG FR4 such as ITEQ-IT-180Aand ISOLA 370HR. ShengYi S1000-2, and many more.

High TG PCB Layout and Design Process

The most important question to be addressed whenever dealing with high TG PCBs is the layout as well as the design.

This is a crucial concern, particularly if you’re manufacturer or would like to design your own high-TG PCB.

In this article I’ll guide your through steps you can follow when design the layout for the high TG PCB.

Designing High TG PCBs

The first step to fabricate the TG PCB, is to create a concept of what you are going to apply. In this case, your PCB design can be assisted by a variety of software programs.

The software includes Eagle, Altium Designer, OrCAD, Pads, and KiCad.

Your manufacturer needs to know which software you are using to design PCBs, this is very important.

High TG PCB Red Solder Mask

Determining  Which Frequency Signal You’ll Utilize on the TG PCB

After you finished designed for TG PCB, you are able to proceed and select the right power and voltage specifications for all electrical components of your PCB.

On the high TG PCB board, you should check the trace length and any impedance available.

You can enlist the help from your manufacturer, who will ensure that your the PCB board’s minimum tolerance requirements.

Furthermore, you should consider how you can reduce the noise produced by the TG PCB.

Stack-up Plan for the Board Documentation

A clear and accurate documentation of the requirements for the stacking-up strategy is essential for the production of a successful high-TG PCB.

It is possible to ask your manufacturer to provide the specifications you’ll require.

Check the type of material and the constraint specifications for your high-TG PCB. You have the choice of FR-4, Nelco or Rogers materials etc.

You can route them if there is a presence of high frequency in the inner layers between the planes.

This is critical to insulate the layers against radiation that the signals emit externally.

You can include ground planes on the stack-up. By doing so, this will reduce the effect of radiation on your circuit.

Floor Planning

Floor planning is about splitting your PCB into the appropriate pieces. It mean whether you must consider whether you want to put all the parts in a big design or place them separately.

You’ll find this step vital when designing analog as well as digital components that you need to separate, thereby making it easier to reduce interference.

In this case you must determine the direction that the circuit will follow.

Determine the Power And Ground Plane

In this case, you must determine the specifics of your TG PCB, including ground and power planes, and verify if they’re completely.

Make sure that the signal routed does not divide the ground plane.

As a result of dividing the ground plane, you will need to rotate the void present since it can affect the timings of signals and the electromagnetic interference.

If you need to separate from the earth plane it is necessary to install an resistor on your signal line.

This can help to improve the signal, acting as a bridge, so you get a return path.

Examining the Land Pattern Size

You must be sure you have the right pattern size for the boards.

In order to have the right proportions, you must ensure that all parts are functioning properly.

High-frequency Signals Routing

Routing high-frequency signals will aid in maximizing shield effect on your PCB with high TG. Be aware that high-frequency signals emit significant amounts of radiation when they cross-section from their source.

Radiation can impact the signals. However, you can route these signals in two different ways.

By minimizing parallel and long signals, you decrease the degree of coupling between the signals.

Increasing the trace distance of the signals is another option.

If the signals are still noisy, you can route them onto a different layer.

You must make sure they are orthogonal.

This means that they can be either horizontal or vertical.

Check for the Return Route

Every signal should have a route from the source that terminates at the sign, and your route should be clear.

Vias can be crucial in certain situations since they aid in having a smooth paths.

This is done by decreasing the possibility of current spreading across the splits on the PCB.

If this occurs this could affect how well the signals are received.

It is possible to achieve an extremely tight coupling by making use of the via in order to switch the current back to the source.

The tight coupling helps in the transmission of signals in time. To reduce the distance in which the signal travels set the reverse via in close proximity to the via.

3W Rule

Additionally, it reduces trace coupling, which affects the quality of signal transmission.

In accordance with this rule, the distance between traces should be three times the width of a trace measured end-to-end.

The 3W rule increases the distance between traces, resulting in a decrease on the effect of coupling.

In order to completely reduce the coupling effect, you should increase the separation distance from 3 to 10.

20H Rule

If you want to reduce the coupling effects on the plane, you have to follow the 20H rule.

The rule states that you must ensure that the dielectric thickness between the power plan and ground are 20 times greater than the power plane.

Coupling of the plane occurs in between ground and power planes. Thus, it will make the risk of damage to the TG PCB.

As a result, this coupling permits fringe absorption can take place in the ground plane instead of being emitting it out externally.

Verifying the Guidelines For Routing

Finally, review the guidelines for routing to make sure you’ve completed all of them.

First, it is advisable to avoid 90-degree bends on traces since they can result in frequencies that have a single reflection.

You may also examine the signals of different pairs to make sure they have the same signal and gap. This can help with the cancellation of electromagnetic fields.

If you use microstrip traces for your transmission lines, you guarantee that the traces provide a signal reference plane that is separated by a dielectric.

The manufacturer will also help you to ensure that your TG PCB meets the necessary tests and high quality standards.

The significance of this is that it assists you get an TG PCB that provides high-quality service.

Hard Gold TG Multilayer PCB

Contact JarnisTech for High TG PCB Support

At JarnisTech, we will help you decide the need for High-temperature circuit boards. We can also guide you towards which materials and techniques will prove useful for your specific application. If you’re in the process of making the transition to RoHS or simply want more details about high-temperature laminates, Please give us a emiall and we’ll gladly assist your needs. We can be reached by dialing 0086-0075-23034656 or make contact with us online today.

Properties of High-TG PCB

Due to the rapid growth of electronics High Tg materials are frequently employed in computer, communications equipment, precise devices and instruments, and etc. In order to achieve high functionality and multi-layer advancement, PCB substrate material must have a greater resistance to heat as a requirement. As high-density mounting technology such as SMT and CMT emerges and develops, boards are increasingly inseparable from the high heat resistance of substrates when thin, small aperture, and finely wired.

A high FR4-Tg FR-4 substrate differs from FR-4 in terms of mechanical strength, adhesion, water absorption, dimensional stability, and thermal decomposition after water absorption. In certain conditions, such as thermal expansion, there are differences in mechanical strength, adhesion, water absorption, and thermal decomposition. Thus, high Tg PCB substrate materials outperform ordinary PCB substrate materials.

In addition, High Tg is well-known within the LED lighting industry since the dissipation of heat from LED is much higher than standard electronic components. The same structure of the FR-4 boards is significantly less expensive than PCBs with a metal core for example, like the aluminum PCB.

High TG Materials Possess These Properties

● High-temperature durability.
● The importance of resistance to thermal stress.
● Thermo-thermal expansion is low.
● Very good PTH reliability.
● Resistance to extreme temperatures.
● Long delamination endurance (aging of materials ) is something to think about to ensure safety).
● Excellent mechanical characteristics.

How Does the PCB React When the Temperature Is Higher Than Its TG Value

● If the PCB temperature is higher than the Tg value for a significant amount duration, the substrate goes through the transition from a glassy state to the state of rubber.

● In this case, the substrate does not melt but becomes rubbery and undergoes structural changes, therefore losing its mechanical and electrical properties.

When Do You Require High TG PCB ?

In the event that your PCB is able to not support a thermal load that is not more than 25 degrees centigrade lower than the Tg, you’ll require a high-temperature PCB to run your programs. Furthermore, it assures security with high-temperature PCBs when the product you are using is within the 130 degree centigrade range or more.

Naturally, the primary reason for PCBs with high Tg is the move towards RoHS PCB. Therefore, there are increasingly more PCB industries shifting to high-temperature materials since the lead-free solder requires higher temperatures.

Benefits of High-TG PCB

There are a few advantages to high-tg PCBs over a standard PCB are outlined below:

Improve Stability

A high-TG PCB provides the highest stability and durability because it is made to withstand high temperatures, moisture harmful chemicals, and humidity. This means that the lifespan of electronic devices improves with high Tg PCBs.

Withstands High Power Density Designs

A high-temperature PCB is a great choice for electronic devices that require high-power since it is capable of enduring high temperatures. This is the reason why demand for industrial heavy equipment has increased rapidly over the past couple of years.

Perfect Choice for PCBs With Multiple Layers

Multilayer PCBs are typically employed for sophisticated and complex electronic devices that operate under extremely high temperatures and pressures A high-tg PCB is ideal for these applications. It has increased the durability, reliability and the functional performance of the boards.

FR4 High TG180 Printed Circuit Board

Applications of High-TG PCB

High Tg PCBs have captured the attention of users as they offer a superior solution for the high density of designs. When you need to deal with electronic devices where high heat production could affect the functioning of the circuit, then a higher Tg PCB is the most efficient and reliable option available. Also, it is more costs to decrease the temperature of an PCB or electronic device because it directly impacts the dimensions, cost and performance of the device.

Therefore, we employ the high-temperature PCB to address this issue for a relatively low cost. High temperature and high density electronic applications are very durable with this printed circuit board, which is not only reliable but also economical. This is why it meets the requirements and needs of industrial and domestic customers, as it can deal using high energy applications.

As we mentioned before the main benefit of a PCB with a high Tg is that it doesn’t get subject to the heat generated by an electronic device.Because these characteristics it is widely used in a variety of applications, some of them including:

Industrial Applications

The majority of industrial processes require high temperatures, harsh chemical, and electrical environments. That’s why these PCBs are extensively used in industrial applications such as drilling presses, high-power machines, solar power equipment and many more.

Automobile Industry

The majority of automotive appliances use high-Tg PCBs. The advent of automatic and self-driving automobiles has prompted the demand of these boards. In the automotive industry, high-Tg PCBs are employed in radar technology and navigation devices, control systems etc. At the same time, the high Tg PCBs are also utilized in telecommunications, computer technology appliances, security systems , such as Wi-Fi boosters, fire alarms high-processing antennas, gateways embedded computer systems as well as other aeronautical and medical equipment where high temperatures and energy are released.

In other word, Rather than minimizing heat generation, developers have developed high temperature printed circuit boards to resist high heat generation that can seriously affect PCB performance.

High temperatures can be catastrophic for PCBs with no protection, as they can damage conductors and dielectrics, causing mechanical stress due to the differences in the rate of thermal expansion and ultimately , causing everything from inconsistent performance to complete failure. If your applications is at risk of exposing your PCBs and PCBs to extreme temperatures or if your PCB has to be RoHS compliant and RoHS Compliant, it is beneficial to consider high Tg PCBs.

Considerations for Heat Dissipation

The importance of high Tg PCBs for the protection of printed circuit boards from high temperatures is unquestionable during the application process or during lead-free assembly. There are, however, several ways to remove the extreme heat generated by electronic applications from your board.

The dissipation of high heat generated by electronics working with printed circuit boards must be taken into consideration in three ways: convection, conduction, and radiation.

Convection heat transfer refers to the process of passing heat to water or air to permit it to move away from an areafor instance in the case of fluids that absorb heat and then flows to a cooling source in order to cool. Convection could also mean using a pump or a fan to push air across the surface, removing heat by transferring heat. In the majority of printed circuit boards you’ll see a convection device in which convection, typically including cooling air fans, absorbs heat via thermal throughways to huge radiative heat sinks attached to electrically conductive backings.

Conduction heat cools when it is placed on the heat sink directly in contact with the source of heat which allows the heat to escape from the source, much in the way the flow of electricity through an electrical circuit. Designers can disperse heat generated by radiation by ensuring that they design an easy pathway that electromagnetic radiation can move towards the origin. In addition, if the board is designed to put reflective surfaces in the path of these waves, even though electromagnetic waves do not produce much heat, can cause a rebound effect that will increase the amount of heat generated by them significantly.

The more heat you have to manage the more it impacts the layout of the boards. The reduction in power density can hinder the efficiency of your product, while adding heat sinks and fans could increase weight, size and also cost. This is the reason even if you’re aware of other methods for managing heat and control, it’s an excellent option to consider high Tg products to complement your heat management solution.

Offering High-temperature PCBs To Meet Your Needs

JarnisTech offer a variety of high-temperature PCB product manufacturing services either with FR-4 or other heat- and temperature-resistant materials. We are able to provide high-temperature PCB manufacturing for industry, automotive, and high-temperature electronic applications. We can produce High-Tg PCBs that have Tg values of up to 180 degrees Celsius. Please find the following table provides a list of the most common materials used for high-TG PCBs.



(DSC, °C)


(Wt, °C)







S1141 (FR4)175300558/
S1000-2M (FR4)180345456020
Rogers 4350B28039050//

High TG PCB Flash Thick Gold

No matter the scope or the complexity of your PCB project We have the technical experience to create custom PCB boards that can meet your requirements. Check our capabilities here:

FeatureOur Capability
Quality GradeStandard IPC 2
Number of Layers2 – 60layers
Order Quantity1pc – 10000+pcs
Build Time2days – 5weeks
MaterialS1141 (FR4), S1000-2M (FR4), IT180, Rogers 4350B
Board SizeMin 6mm x 6mm | Max 500mm x 900mm
Board Thickness0.4mm – 6.5mm
Copper Weight (Finished)0.5oz – 30oz
Min Tracing/Spacing3mil/3mil
Solder Mask SidesAs per the file
Solder Mask ColorGreen, White, Blue, Black, Red, Yellow
Silkscreen SidesAs per the file
Silkscreen ColorWhite, 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 Ring4mil
Min Drilling Hole Diameter6mil
Other Techniques

Gold fingers

Blind/Buried Vias

Countersink Holes


After reading this guide, you’re an expert in anything related to a TG PCB. You must pay special attention to the process of fabrication and also the specifications of a high-quality TG PCB.

JarnisTech is a can assist in the design and fabrication of TG PCB board manufacturer. If you’re still having any issues you are having trouble with, contact us now. We are happy to provide professional engineering technology to support you and help you to solve queries about your high TG PCB project.

Call us to get a free quote now