fr4 printed circuit board - 1 views
-
greenstone1 on 13 Jan 23What is FR4? FR4 is the name of a type of epoxy glazing material. fr stands for flame retardant. 4 refers to the factors that differentiate it from other materials. FR4 means two things. The material. As a construction material, it refers to epoxy laminates reinforced with glass fibers. Used to make FR4 boards.