FR-4: Used by many known by few
The non-conductive parts of a PCB’s buildup, the laminate, is usually made of bundled fibreglass strands that are embedded in epoxy resin. The most common type of laminate grade is FR-4, Flame Retardant 4, that has properties most suitable for a wide range of PCB applications. FR-4 is by far the most common laminate, but […]