The higher the Tg point is, the higher the temperature requirement of the plate is when pressed, and the pressed plate 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.
Generally speaking, Tg boards are more than 130 degrees, high-tg boards are more than 170 degrees, and medium Tg boards are more than 150 degrees. The Tg of the substrate is improved, and the characteristics of the PCB, such as heat resistance, moisture resistance, chemical resistance and stability resistance, will be improved.
The higher the TG value, the better the temperature resistance of the plate, especially in the lead-free tin spraying process, high TG application is more.
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 substrate 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.
So general with high Tg FR FR – 4-4 under the thermal state, is the difference between a heat, in particular after the moisture absorption of its material mechanical strength, dimensional stability, adhesion, water absorption, thermal decomposition, thermal expansion situations vary, such as high Tg products is significantly better than the ordinary PCB substrate materials in recent years, the production high Tg PCB customer increased year by year.
Yongmingsheng technology co., LTD. Is a high-tech company integrating circuit board development, design, proofing, production (processing), testing, production and sales.
The main products are:1Layer PCB,2Layer PCB,Mutilayer PCB, reasonable price;
Since the establishment of the company, from the original professional circuit board processing, to expand the production of flexible circuit board, rigid circuit board, etc.We have been making progress, we have been committed to become a quality PCB manufacturer and service provider.