FR-4 Alert
FR-4 Alert 🚨Did you know that:The FR in FR-4 stands for "flame retardant". It refers to its ability to self-extinguish after a fire. 🤚FR-4 is a composite material made of glass fibers surrounding an epoxy resin 🔍FR-4 is not the material name, but a collective term for a variety of laminates with different properties. 💡FR-4 was defined in the 1960s...