What is FR4 Tg130?

The article here tells you everything you should know regarding the FR4 Tg130. These include the definition, material type, surface finishes, applications, and its properties. Whatever information you need, you will get it right here.

FR4 Tg130: What does this mean?

Tg is the abbreviation denoting the temperature of glass transition. This is the temperature at which printed circuit boards change from being hard to being soft. So, when we say Tg130, it means that the temperature at which this PCB changes is 130 degrees Centigrade.

FR4 Tg130: What are the Benefits?

You can choose the best materials for your printed circuit board on various applications just by having some knowledge of the Tg. Using the FR4 Tg130, also comes with other benefits.

High insulation properties

Having the Tg at 130 degrees means that you will face no issues while insulating the PCB. This means that you shouldn’t worry about the leaking of electric current, due to its high insulation properties.

Low water absorption rate

Printed circuit boards with fr4 Tg130 are useful in applications that carry a lot of moisture. Also, you can believe that they will not permit easy water entry into printed circuit boards.

High Arc Resistance

Furthermore, with Tg 130, you will get great abilities for insulation, which will help in sustaining surface discharges. With a 10 ma of current or more, having Fr4 Tg130 means high arc resistance. This happens especially without electrical or structural damages.

Great aspects for manufacturing

With fr4 Tg130, it becomes easy for you to gain access due to its great aspects for manufacturing. Also, manufacturers find it very familiar. This is why it is easier and simple to manufacture.


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What are the Testing Techniques for Fr4 Tg130?

For the testing of the temperature of glass transition, you can use three major techniques. These include dynamic mechanical analysis, thermal mechanical analysis, and differential scanning calorimetry.

Dynamic Mechanical Analysis

This technique is the most sensitive. It helps in measuring the responses of a material after applying stress. Also, it considers how different materials respond to stress after applying different rages of temperature.

Furthermore, with this, you will be able to separate and measure the polymers’ elastic and viscous components alongside the temperature of glass transition.

Thermal Mechanical Analysis

This method is useful in measuring the polymers’ CTE (coefficient of thermal expansion) while under test. Furthermore, this approach is a mechanical one and it makes use of heating as well as measuring the test samples. It then uses this to calculate the coefficient of thermal expansion.

However, if you are dealing with amorphous polymers and you need to test it, then don’t use thermal mechanical analysis. This is because the heating of the polymers will happen excessively. Also, note that the rate of heating you will go for will also affect the final temperature for glass transition.

Differential Scanning Calorimetry

While testing polymeric materials of Tg, then try to use the most traditional and common technique. Here, you will use a technique for heat flow. You then compare the heat amount you supply and the samples for the test.

Furthermore, you will find a comparison to a reference that is similarly heated, which will tell the right points of transition. Also, you will then calculate the temperature of glass transition from reference point results.


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What Surface Finishes are Compatible with FR4 Tg130?

For sure, there are surface finishes that are useful on PCBs having Fr4 Tg130. These surface finishes are useful in improving the printed circuit board’s overall image, with a temperature of glass transition at 130.

Below are some surface finishes, which you can select to use for your printed circuit board. These include: Immersion silver, immersion gold, hard gold, HASL lead-free, ENEPIG (Electro Nickel Electroless Palladium Immersion Gold), and OSP (organic solderability preservatives).

Please note that the PCB’s surface finish won’t affect the performance or the temperature of glass transition.

Which Solder Masks work with FR4 Tg130?

One thing you must not relent on is your PCB’s performance while maintaining the Tg130. This implies that you have to use solder masks that will prevent solder brides from forming.

Furthermore, you need solder masks to help avoid oxidation, which would affect the PCB’s performance adversely.

The colors of solder masks that will work with fr4 tg130 include yellow, red, green, purple, black, white, blue, matte green, and matte black.

What Time is Most Appropriate for the Use of FR4 Tg130?

When making use of the Fr4 tg130, you must be careful. Also, you have to know the most appropriate time to utilize it.

This temperature range is an appropriate one, which is useful in applications, so far you don’t surpass Tg130. It is useful when building printed circuit boards that are rigid, as well as building products that surround these rigid PCBs.

Furthermore, it is useful for different PCB types. These include single layer, double layer, and multilayer or multiple layer printed circuit boards.


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Are there other FR4 Materials you can Use Asides FR4 Tg130?

In order to maintain 130 as the temperature of glass transition, there’s a need to make use of materials, which will alter the state at a temperature of 130 degrees.

However, if the need arises to exceed Tg130, other materials are available, which you can use. Some of these materials include the following.

Thickness of the FR4 Tg130 Board

There are no specific sizes regarding the thickness of the Fr4 Tg130 board. What we mean is that you can select and utilize any thickness for the board. Just ensure that it suits the requirements for your application.

In any standard board, you will discover that the thickness of the PCB falls within the range of 0.2 – 6mm. However, you have to maintain the temperature of the glass transition. It must be at the usual 130 degrees centigrade.


From the article, Tg 130 indicates the temperature at which this PCB changes is 130 degrees Centigrade. If there are aspects of this article you need clarification on, please send us a message.

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