What is TG in PCB board

HDI is a precision process technology that uses micro-blind and buried via technology and build-up method to process high-density multi-layer PCB boards in the circuit board industry.

TG in PCB board material means temperature resistance:

The higher the Tg point, the higher the temperature requirement when the board is suppressed, and the suppressed board will become hard and brittle, which will affect the quality of mechanical drilling to a certain extent in the subsequent process.

Ordinary Tg sheet is above 130 degrees, High-Tg is generally above 170 degrees, and medium Tg is above 150 degrees. The Tg of the substrate has been improved, covering heat resistance, moisture resistance, chemical resistance, fastness, etc., and the function of printed boards will continue to improve.

The higher the TG value, the better the heat resistance of the board, especially in the lead-free tin spraying process, the application of high Tg is more widespread.

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

Glass transition temperature is one of the characteristic marking temperatures of high molecular polymers. Taking the glass transition temperature as the boundary, polymers express different physical properties: below the glass transition temperature, the polymer material is a molecular compound plastic; above the glass transition temperature, the polymer material is a rubber.

From the point of view of engineering application, the glass transition temperature is the maximum temperature of engineering molecular compound plastics and the lower limit of rubber or elastomer application.

With the rapid development of the electronics industry, especially the development of electronic products represented by computers, the development of high functions and high multi-layers requires PCB substrate materials to have higher heat resistance, which is a critical guarantee.

The emergence and progress of high-density mounting technology represented by SMT and CMT requires that the PCB has a small aperture, precise wiring and thinning and the support of the high heat resistance of the substrate is more and more inseparable. .

Temperature resistance 2113 value.

The Tg point indicates that the higher the temperature requirements of the sheet metal when pressing the 5261, the higher the wrench ratio and the brittleness of the 1653, which will affect the quality of the mechanical drilling (if any) in the subsequent process and the special electrical properties during use to a certain extent. nature.

The ordinary Tg of the sheet is above 130 degrees, the High-Tg is generally greater than 170 degrees, the medium and normal Tg is greater than 150 degrees, the Tg of the substrate has increased, the heat resistance of the printed board, moisture resistance, chemical resistance, and stability. Characteristics such as sexuality will grow and improve.

Application

With the rapid development of the electronics industry, especially the electronic products represented by computers, the development of high functionality and high multi-layers requires higher heat resistance of PCB substrate materials as a critical guarantee. The emergence and progress of high-density mounting technology represented by SMT and CMT makes PCB more and more inseparable from the support of high heat resistance of the substrate in terms of hole diameter, precise and meticulous circuitization, and thinning.

Therefore, the difference between ordinary FR-4 and high Tg FR-4 is the mechanical strength, dimensional stability, adhesiveness, water absorption, thermal decomposition properties of the material in a hot state, especially when heated after absorbing moisture. There are differences in various working conditions such as thermal expansion and thermal expansion. The surface of high Tg products is better than that of ordinary PCB substrate materials. In recent years, the number of customers who require the manufacture of high Tg circuit boards has increased year by year.

1. The temperature of the substrate from a solid molten rubbery liquid is called the Tg point, which is the melting point.

2. The higher the Tg point, the higher the time required for the plate to be pressed, and the pressed wrench will be harder and brittle, which will affect the quality of the mechanical drilling (if any) in the subsequent process and the electrical power during use to a certain extent. The special nature of sex.

3. The Tg point is the maximum temperature (°C) at which the substrate maintains rigidity. That is to say, the ordinary PCB substrate material not only softens, deforms, melts and other phenomena at high temperature, but also shows the rapid decline of mechanical and electrical special properties.

4. The ordinary Tg sheet is above 130 degrees, the High-Tg is generally greater than 170 degrees, and the medium and normal Tg is greater than 150 degrees; the Tg of the substrate increases, and the heat resistance, moisture resistance, chemical resistance, and resistance of the printed board. Characteristics such as robustness will grow and improve. The higher the TG value, the better the temperature resistance of the sheet, especially in the lead-free tin spray process, high Tg applications are more common.

Beton mainly produces high-frequency circuit boards, aluminum-based circuit boards, PCB circuit boards, LED circuit boards and multi-layer circuit boards, which are widely used in aerospace, national defense, communications, household appliances, environmental protection, medical and industrial control fields. In addition, recycling circuit board slats, corrosion potions, and can be preset according to the schematic diagram provided by the customer, and the provided sample copy board.

Tg refers to the CORE glass transition temperature. You know it as the softening temperature of the sheet material. The tg value is generally used for high-rise boards. It is resistant to the critical melting point value at the time of lamination. Common sense understands it as the temperature resistance value! For the pre-positioned person, the Tg value of the selected PCB is determined by the office temperature or background conditions of the product PCB involved. Like common sense, the TG value of fr-4 sheet is in the range of 130-150. The fr-4 substrate that is considered appropriate is to collect and purchase two A-level military materials, Shengyi tg140 and Kingboard tg130. This tg value board Materials are widely used in consumer electronics, vehicle electronics, industrial control, spectrograph instruments, power supplies and other fields.