Meaning of high TG circuit board:
At present, every enterprise and individual demand for high TG circuit board is increasing, now China circuit board factory will introduce what is high TG circuit board.
High Tg refers to high heat resistance. Generally speaking, the board of Tg is more than 130 degrees, high Tg is more than 170 degrees, medium Tg is more than 150 degrees, and usually Tg≥170℃ PCB is called high Tg PCB.
With the rapid development of the electronic industry, especially the electronic products represented by computer, the development towards high function and high multilayer requires the higher heat resistance of PCB base materials as an important guarantee.
The appearance and development of high-density installation technology represented by SMT and CMT make PCB more and more inseparable from the support of high heat resistance of substrate in small aperture, fine circuit and thin form.
The Tg of the substrate has been improved, and the characteristics of the PCB, such as heat resistance, moisture resistance, chemical resistance, stability resistance, etc., will be improved and improved.
The higher the TG value, the better the temperature resistance of the board. Therefore, in many lead-free processes, high TG is more widely used.
Maybe the above introduction is too confusing for you to understand. In order to make you better understand the high TG circuit board, we can divide it into the following points:
The critical temperature at which the substrate melts from a solid state to a rubbery fluid is called the Tg point, which is the melting point
The higher the Tg point is, the higher the temperature requirement of the board is when pressed, and the pressed board will be hard and brittle, which will affect the quality of the mechanical drilling (if any) in the later process and the electrical properties during use to some extent
Tg point is the maximum temperature (℃) at which the substrate remains rigid.That is to say, ordinary PCB base material at high temperature, not only produce softening, deformation, melting and other phenomena, but also show in the mechanical and electrical characteristics of a sharp decline
Generally speaking, the board of Tg is more than 130 ℃, high-tg is more than 170 ℃, and medium Tg is more than 150 ℃.The Tg of the substrate has been improved, and the characteristics of the PCB, such as heat resistance, moisture resistance, chemical resistance, stability resistance, etc., will be improved and improved.
Our products are: high-precision double-layer PCB, high-tg PCB, heavy copper PCB, flexible PCB, special substrate and customized printed circuit board of various special requirements. These products are widely used in every corner of life.
Our company has always been fully new to provide customers with professional PCB processing, design, production services. Advanced special production equipment and testing instrument for PCB. Excellent technology also ensures that all kinds of possible problems can be solved easily.
Process capability of high TG circuit board:
Maximum processing area: 640mm*1100mm
Copper thickness: 0.5 OZ – 13 OZ
2 layers: 0.2mm–6.0mm
4 layers: 0.4mm-8.0mm
6 layers: 0.8mm-8.0mm
8 layers: 1.0mm-8.0mm
10 laminates: 1.2mm-8.0mm
12 laminates: 1.5mm-8.0mm
14 laminates: 1.5mm-8.0mm
16 laminates: 1.6mm-8.0mm
18 laminates: 2.2mm-8.0mm
20 laminates: 2.4mm-8.0mm
Minimum line width/spacing: 3mil/3mil
Finished minimum aperture: 0.15mm
Maximum machined thickness to diameter ratio: 12:1
Impedance control: +/-10%
Surface treatment: spray lead tin, spray pure tin, chemical sink gold, chemical sink tin, chemical sink silver, plug gold plating, oxidation prevention.
Commonly used sheet: FR4 Tg130 / Tg170 ℃, Rogers, Arlon, Taconic, Bergquist.
Special process: buried hole, blind hole, plate hole, plate edge metallization, half hole, step mounting hole, control depth drilling, metal base (core) plate.