World Class High TG PCB Manufacturer in China

PCBMay is a Professional High TG PCB Boards Manufacturer in China,Who Provides Many Different Kinds of High TG Boards.

The Glass Transition Temperature (Tg) is one of the most important properties of any epoxy and is the temperature region where the polymer transitions from hard, glassy material to a soft, rubbery material.

Circuit board material must flame-resistant, it can’t be burned at a certain temperature and only be softened. The temperature point is called the glass transition temperature (Tg).

The higher Tg point means a higher temperature requirement during lamination. And the boards will be hard and crisp, which will affect the hole and the electrical properties.

Main Advantages of High TG PCB Boards

Over 12 years High TG PCB  manufacturing experience.

Over 80 technical engineering to support your electronic development and manufacturing.

The higher the TG value,the better the temperature resistance of the sheet. Especially in the lead-free process, the application of high Tg is more.

Resistance to high temperatures and Low thermal expansion.

Long delamination durability (aging of materials to consider for safety reasons).

UL,RoHs,REACH and ISO Certifications.

Providing Micro-section,soldering sample and COC report.

Shipping by international forwarder UPS,Fedex,DHL.

7/24 online support for your business.



FR-4 refers to a grade of epoxy fiberglass material where the FR stands for "flame retarding". The TG130 refers to the glass transition temperature and indicates that this material will begin to deform at 130 ℃. FR-4 is the most common substrate material for rigid PCBs, particularly prototypes. In the PCB, the pre-preg and core will be made of this material.



General medianTg is greater than 150-160 centigrade,As general rule the higher the Tg, the more stable the material is during the PCB manufacturing process and assembly.If you are not sure about what material you should specify, ask you PCB manufacturer. They know their process and they know what they are capable of.


FR4 High TG170 PCB

FR-4 materials with higher glass transition temperatures are available in the Advanced PCB service. High TG FR-4 (TG170) boards can withstand deformation at higher temperatures of up to 170 ℃ and are suitable for extreme temperature applications.If you want to make multi-layers (more than 10 layers) with blind & buried via,then high Tg material will be recommend.



The typical FR4 TG175 material is Nelco N4000-6,which is a high-Tg epoxy laminate and prepreg system that provides a wide range of performance versatility and ease of processing for demanding high-layer count applications.It has Excellent electrical properties for a standard loss material,supporting advanced technology PWB designs and suitable for high-layer count, sophisticated PWB designs.



PCBMay can manufacture High-Tg PCBs with a Tg value of up to 180°C,normally it's typical ITEQ 180 and 370HR.Where quality is the highest priority, we would recommend utilizing ITEQ IT180A (TG 180) which is also RoHS compliant. ITEQ IT180A (TG 180) is comparable in quality and to Isola 370HR (TG 180),which are made using a patented high performance 180°C Tg FR-4 multi-functional epoxy resin system



PTFE materials are valued for their suitability in high-frequency applications. At RF and Microwave frequencies, the dielectric constant of standard FR-4 Material (approx. 4.5) is often too high, resulting in significant signal loss during transmission across the PCB. Fortunately, PTFE materials boast dielectric constant values as low as 3.5 or below, making them ideal for overcoming the high-speed limitations of FR-4.

Frequently Asked Questions (FAQ) About Our High TG PCB Boards Process and Capabilities

Here you will find many quick questions and answers about High TG PCBs,don’t hesitate to contact us,our email is sales@pcbmay.com.

Medium Tg PCBs generally have a maximum temperature of above 150°C while high Tg PCBs are rated above 170°C. PCBs with higher Tg value also demonstrate better moisture and chemical resistance, as well as sturdier physical structure in heat.

TG, or Glass transition temperature, is the base material parameter that stands for the temperature (°C) on which the base material becomes mechanically unstable. Tg is the value that needs to guarantee the mechanical stability of the PCB during operational life time of the PCB.

TG means Glass Transition Temperature.The TG of a resin system defines when a thermoset polymer goes from an amorphous rigid state to a more flexible state. TG is an abbreviation for Glass Transition Temperature.

For PCBs, the Tg corresponds to the temperature at which fiberglass becomes amorphous during lamination at high temperatures and under pressure of the different material layers. The standard FR4 Tg is between 130 – 140°C, the median Tg is 150 °C and the high Tg is greater than 170°C.

The Glass Transition Temperature (Tg) is one of the most important properties of any epoxy and is the temperature region where the polymer transitions from a hard, glassy material to a soft, rubbery material.

The standard TG value is TG130-140.

No,we can produce 1 to 10,000 pieces,what’s more,there is also no minimum order surcharge or additional fees

What is High TG PCB

In recent years,there are more and more customers request to manufacture PCB with high Tg,in the following we would like to describe what is high Tg PCB.

Tg is the glass transition temperature of a Printed Circuit Board.It is that temperature at which the base material of a PCB starts to transform from a brittle condition to a soft, elastic one.A PCB whose glass transition temperature (Tg) is greater than 170 ℃ is known as a High Tg PCB.Generally speaking,Tg values for PCBs is between 130 and 170 ℃.

Here are some popular High Tg board raw material in market:

Every PCB has a different Tg value based on its substrate.If the operating temperature of the board exceeds its Tg value,the board will begin to change its state which will have an adverse effect on the functionality of the PCB. High Tg PCB boards perform better at high temperatures with better stability as the substrate provides better heat resistance, chemical and mechanical stability to the board.

When selecting a PCB,the Tg value should be at least 20-25 degree Celsius higher than the expected operating temperature of the device in which the PCB is used.For instance,if you have a PCB with a Tg value of 130 degree Celsius than the working temperature of the device should be lower than 110 degree Celsius.

Advantages of High TG PCB

Withstand High Power Density Designs:If a device has high power density with very high heat generation rate then High Tg PCB is a good solution for heat management.

Reduction in the heat generation of a regular PCB can be accomplished by using a larger PCB,changing the design and power requirements of a device. Alternatively, a high Tg PCB board can be used.

Ideal for Multilayer & HDI PCBs:Multilayer & HDI PCBs are more compact and have very dense circuits which can result in high levels of heat dissipation. High Tg boards are often used in these kinds of PCBs to ensure reliability during operation.

Higher Stability:If the Tg of a PCB substrate is increased then it will automatically increase the heat resistance,moisture resistance,chemical resistance and stability of the device.

We can manufacture High-Tg PCBs with a Tg value of up to 180°C.Following table lists some of our commonly used materials for High-Tg PCBs production.

(DSC, °C)
(Wt, °C)
CTE-z (ppm/°C)Td260 (min)Td288 (min)
S1141 (FR4)175300558/
S1000-2M (FR4)180345456020
Rogers 4350B28039050//

Check our capabilities in here:

Quality GradeStandard IPC 2
Number of Layers2 – 40layers
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 – 2.0oz
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 FinishHASL – 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 TechniquesGold fingers
Blind/Buried Vias
Countersink Holes

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