CEM-3 is lighter than FR4,the average weight is about 3.5KG/sqm. but now most of PCB manufacturers less use CEM-3 material to make PCB,almost use FR4 material.
Read More: FR4 PCB
#PCB Design #PCB Materials
Why does my RF PCB have small holes in the ground polygon?
I ordered RF PCB design and prototype from my supplier . There are something like a hole, but it is not, on the ground surface. What is the purpose of making these holes? The PCB is inside of the E70 433NW14S LoRa module.
Oliver Smith
November 17, 2023
