All You Need to Know About What Is High TG PCB

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Every PCB has a layer of metal before you start installing electronic components on it. While you are designing a complex PCB design that will be used in high-tech devices, the temperature might rise to an unbearable level, and the PCB might melt. To save your PCB from melting, you use a HIGH TG layer. It is a resin designed to withstand hard and high-temperature environments.

In further detail, you will learn more about What Is High TG PCB and its other details that will help you to understand this material more thoroughly.

What Is High TG PCB?

A high-temperature PCB that has been designed to withstand high temperatures like up to 150 degrees Celsius. A PCB will be called high TG only if the glass transition temperature reaches 150 degrees Celsius.

The material of high TG never burns at high temperatures because it has to be flame resistant. Even if the temperature gets too high, the TG PCB will only soften but never melts. The temperature is known as glass transition temperature.

Flame resistant material

You might wonder what material is used to design a high TG PCB. Well, you should know that a high TG PCB has a base material that has to be flame resistant. It will not burn to a certain temperature but only gets softened.

Key Properties to know about

Following are the properties that will help you to understand the concept in a better way:

  • High-temperature resistance

As mentioned above, the PCB is a high TG PCB only if it can resist high temperatures. We are not talking about 100 degrees Celsius but up to 150 degrees Celsius. Sometimes a PCB gets installed in an electronic device that gets hot, and a simple PCB won't be able to sustain itself.

It can handle extremely harsh temperatures and it won't melt. It might get a little softened, but it will not melt in any condition.

  • Maximized resistance against pressure

After the temperature not, it comes the pressure. Well, it can handle high temperatures then it will be able to resist high pressure as well. While you are assembling your high TG and installing the components on it, even after you install the PCB in the high-tech device, nothing will affect the working of your PCB.

Yes, you can call it a specialty of this type of PCB hat pressure doesn't harm the working density and performance. So, another property is high resistance against pressure.

  • Improved electrical and mechanical properties

We are talking about a PCB that you will be designing for a high-tech or harsh environment. Well, nothing will affect your high TG PCB's electrical and mechanical properties. Compared to types of PCB, a high TG PCB has improved mechanical and electrical properties. As it will be more resistant to harsh temperatures, nothing will affect its electrical properties.

The current will pass with the same density, and the performance of your high TG will not be affected by any factor.

  • More thermal stress resistance

While you compare a simple PCB with a high TG one, the simple PCB will start melting at high thermal pressure. It will not be able to bear it, but it will resist high thermal stress when it comes to a high TG. The heat will only soften it when the temperature crosses 150 degrees Celsius. Otherwise, heat will not be able to damage or affect the performance of a high TG PCB.


Benefits of high TG PCB you need to know about

Here are a few beneficial facts.

  • A smart option for high power density designs

There will be a working environment where the temperature gets too high for a designed PCB. A simple single-layered PCB or a double-layered PCB will not be able to withstand high temperature and pressure. Therefore, a high TG PVB works best for a high power-density design.

A high power density machinery like a drilling machine or power inverters, only high TG PCB would work because they are designed to handle pressure and high-power tasks.

  • Withstand harsh conditions

A PCB will only be called a high TG if it can handle harsh conditions. The PCB doesn't melt if the temperature gets heavily hot. The working of the high TG PCB will not get affected by the hot temperature. So, another benefit of this type of PCB is that it can withstand harsh conditions. You can use the machinery for hours; the PCB will keep performing its task, and nothing will interrupt your work.

To withstand harsh conditions is one requirement of building a high TG PCB. So, you can get this PCB for your industrial machinery or any other device you will use in harsh conditions.

  • Works best for multi-layer PCBs

Multi-layer PCBs are tough to design and manufacture. They consist of 3 layers at least, and the usage of such PCBs is for high-tech machinery or the equipment people use in harsh environments. High TG PCB works best when you turn it into a high TG multi-layer PCB.

You will get the properties of high TG and multi-layer PCB together. The outcome of such PCBs will be amazingly perfect.

  • Stability and durability

Stability and durability matter the most when it comes to designing a PCB. If these two factors are not there, then your PCB won't be able to work for longer. Yes, you get both stability and durability.

Its life span is approximately 50-70 years. If you keep using and maintaining the machinery in which the high TG PCB has been installed, it might work every more than 70 years. It will keep working at the same pace in a harsh environment, and this is what you call stability.

Cons to know about

Here are a few drawbacks

  • If the temperature exceeds the TG limit of the PCB, then the electronic components turn rubbery.
  • The PCB will lose its electrical and mechanical properties
  • They are expensive as compared to other types of PCBs
  • A structural change takes place after the temperature gets too high

Why do you have to get a high TG PCB?

You might wonder why you have even to consider high TG PCB when other types of PCBs are already available.

Obviously, having variety of options makes it hard to pick from but going or high TG PCB can be a good option as it covers different sectors and fulfils the needs of big markets.

Applications to know about

They are used in machinery and equipment that are used in harsh environments. In the industrial area where the temperature will be too high, heavy machinery gets used, and there is no way a simple PCB can handle it, so a high TG PCB comes to use. Yes, in industrial applications, high TG PCBs are used. Here are a few applications:

  • High-power pressure
  • Power inverters
  • Drilling machines
  • Solar power equipment

We have mentioned only four pieces of equipment in which high TG PCB gets installed, but you might have an idea about the other devices in which only high TG PCB can handle the temperature and the pressure.

What will be the TG value for PCB

The standard TG value for PCB is between 130-140 degrees Celsius, and the median TG value is 150 degrees Celsius, but when it comes to high TG PCB value, then it will be greater than 170 degrees Celsius.

Is it complex to design?

Well, the answer to this question is yes. Designing and manufacturing it is quite difficult. You will have to keep testing the temperature limit of the PCB to make it into a high TG one. If anything goes wrong, finding the fault to fix it will also be a task for you. Most of the time, high TG PCBs are used to design a multi-layer PCB.

Multi-layer PCB consists of a minimum of 3 layers, and it is one of the most difficult PCBs to design. When you design a high TG multi-layer PCB, the complexity level will get even higher. It will get expensive, complex, and hard to manufacture. Doubtlessly, the demand for high TG PCB is high, but they are tough to design.

You need to make sure you design it with the help of experts as it will cost you a lot and you surely don’t need to make mistakes in doing it again and again. If you have the basic knowledge of PCB design you can know about its complexity and design it to make sure you design it for the perfect output.

Final Remarks:

We have talked about What Is High TG PCB, and every little detail about high TG PCB above. Most of the time, this type of PCB is designed for complex and high-tech electronic devices. High TG material is mostly used in multi-layer PCBs because multi-layer PCBs are complex to design, and they only fit in complex electrical devices. So, most of the time, you will find a multi-layer PCB as a high TG PCB.


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