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TG in PCB board material is heat resistant.
The higher the TG point is, the higher the temperature is required. And the suppressed material will harden and become brittle, which will influence the quality of the mechanical drilling in the immediate process (if any).
The typical TG sheet is above 130 °C, the high-Tg is above 170 °C, and the medium TG is above 150 °C. TG of the substrate has been improved, covering heat resistance, moisture resistance, chemical resistance, fastness, and so on, and PCB function will continue to improve. The higher TG value, the better heat resistance of the board, especially in the lead-free spray tin process, high TG application is more widespread.
More details about TG PCB material
The higher TG value, the better heat resistance of the PCB boards, especially in the lead-free process, with high TG application more. The glass transition temperature is one of the characteristic temperatures of polymer. With the glass transition temperature as the boundary, the polymer exhibits different physical properties: below the glass transition temperature, the polymer material is a molecular compound plastic.
From the point of view of engineering application, the glass transition temperature is the maximum temperature of engineering molecular compound plastic and the lower limit of rubber or elastomer.
With the rapid development of the electronic industry, the high-function, and high-multi-layer require PCB substrate to have higher heat resistance, which is the critical guarantee.
The development of high-density mounting technology of SMT and CMT, the requirement of PCB aperture, precise and meticulous wiring, and thinness is more and more high heat resistance of the substrate。
TG PCB Temperature Resistant Value
The TG point shows that the higher the temperature required at pressing 5261, the higher the wrench ratio and brittleness 1653, to a certain extent after the process will affect the quality of mechanical drilling (if any) well as the use of unique electrical properties.
The typical TG is over 130 °C, and the high-Tg is over 170 °C, the medium constant TG is over 150 °C, the TG of substrate increases, the heat resistance, moisture resistance, chemical resistance of PCB, stability and other characteristics of the mark will grow and improve.
TG PCB application
With the rapid development of the electronic industry, especially the electronic products represented by computers, the demand for high heat resistance of PCB substrate is becoming more and more critical. With the development of SMT and CMT as the representative of high-density installation technology, PCB needs the support of high heat resistance of substrate more and more in hole diameter, precise circuit, and thin type.
So the difference between ordinary FR-4 and high TG FR-4 is in the hot state, especially in the heat after hygroscopic, the mechanical strength, dimensional stability, adhesion, water absorption, thermal decomposition, thermal expansion, and other things are different, the surface of high TG products is better than ordinary PCB base material, in recent years, the demand for high TG PCB manufacturing customers year by year.
1. The substrate by the solid melt rubber state fluid criticality, called TG point that melting point.
2. The higher the TG point indicates that the higher the pressing time of the plate is, the harder and more brittle the pressed wrench will be, to some extent, affects the quality of the post-process mechanical drilling (if any) as well as the electrical properties specific to its use.
3. The TG point is the highest temperature (C) at which the substrate maintains its rigidity. That is to say, ordinary PCB substrate material at high temperature, not only the occurrence of softening, deformation, melting, and other phenomena, but also table now the mechanical and electrical properties of the rapid decline.
4. The TG of typical TG is above 130 °C, the high-Tg is above 170 °C, the regular TG is above 150 °C, the TG of substrate increases, printed boards of heat resistance, moisture resistance, chemical resistance, fastness, and other characteristics of stability will be increased and improved. The higher TG, the better temperature resistance of the PCB board, especially in the lead-free HASL applications.
Yooproo Ltd produces high-frequency circuit boards, aluminum base circuit boards, PCB circuits, LED circuits, and multilayer circuits, widely used in aerospace, national defense, communications, household appliances, environmental protection, and medical and industrial control fields. Additionally, recycle circuit board strip, corrode liquid medicine son, and supply sample copy plate according to customer supply schematic diagram presetting.
Tg refers to the CORE glass conversion temperature, you understand as the PCB softening temperature, TG value is generally to do high-rise board, at the time of laminating critical melting point value, common sense to know as the temperature value. For pre-selected positions, the selection of the TG value depends on the product involved in the PCB office temperature or background conditions. As common sense FR-4 plate TG value is in the range of 130-150, the TG value boards are widely used in consumer electronics, vehicle electronics, industrial control, spectrograph instrument, power supply, and so on.
