What is FR4
FR4 is a glass-reinforced epoxy laminate used for rigid printed circuit boards. It provides a practical balance of mechanical strength, insulation performance and process compatibility.
FR4 PCB Materials
FR4 PCB Material Guide
FR4 is the most widely used base material for rigid PCB fabrication. Material selection should consider Tg, thickness, copper weight, application environment and reliability requirements.
What is FR4
FR4 is a glass-reinforced epoxy laminate used for rigid printed circuit boards. It provides a practical balance of mechanical strength, insulation performance and process compatibility.
Tg options
Standard FR4 and High Tg materials are selected according to operating temperature, assembly process and reliability requirements. High Tg materials are often considered for higher thermal stress.
Material selection
Material choice should be reviewed together with board thickness, layer count, copper weight, controlled impedance and final application environment.
Applications
FR4 PCB is used in industrial electronics, power supply boards, IoT devices, consumer electronics, automotive electronics, medical equipment and general electronic assemblies.
Manufacturing considerations
Important review points include laminate type, thickness tolerance, copper balance, drilling, solder mask, surface finish and testing requirements.
Engineering review first
YBCPCB reviews PCB files, material requirements, stackup notes and inspection needs before production planning.
Tg options
Standard FR4 and High Tg materials are selected according to operating temperature, assembly process and reliability requirements. High Tg materials are often considered for higher thermal stress.
Material selection
Material choice should be reviewed together with board thickness, layer count, copper weight, controlled impedance and final application environment.
Discuss your PCB project with engineering.
Send files, stackup notes and manufacturing requirements for technical review.