HF PCB Materials
High-frequency PCB for cordless applications and also information prices in the top GHz array have unique needs on the product made use of:
Typically talking, high frequency can be specified as regularity over 1GHz. Presently, PTFE product is extensively made use of in high-frequency PCB production, it's additionally called Teflon, which regularity is generally over 5GHz. Besides, FR4 or PPO substratum can be utilized to the item regularity amongst 1GHz ~ 10GHz. These 3 high-frequency substrata have listed below distinctions:
Worrying the laminate expense of FR4, PPO, and also Teflon, FR4 is the least expensive one, while Teflon is one of the most pricey ones. In regards to DK, DF, water absorption, and also regularity attribute, Teflon is the most effective. When item applications call for regularity over 10GHz, just can we select Teflon PCB substratum to make.
The efficiency of Teflon is much better than various other substrata, Nevertheless, the Teflon substratum has the negative aspect of high expense and also huge heat-resisting building. To enhance PTFE tightness as well as heat-resisting residential property features, a multitude of SiO2 or fiberglass is the loading product.
On the other hand, because of the particle inertia of the PTFE product, which is hard to integrate with copper aluminum foil, therefore, it requires to do the unique surface area therapy on the mix side. Worrying mix surface area therapy, typically make use of chemical etching on PTFE surface area or plasma etching to plus surface area roughness or include one glue movie in between PTFE and also copper aluminum foil, yet these might affect dielectric efficiency.