FR-4 PCB Materials

Most printed circuit boards are manufactured using glass-reinforced epoxy laminate as the substrate. While there are a wide variety of laminates available on the market, FR-4 is both versatile and well-accepted as a standard material for PCB manufacture. FR-4 functions well as an electrical insulator, and has a good strength-to-weight ratio, and is flame resistant.

The standard FR-4 material that is used in our products is a high temperature, high Td, low CTE 150Tg material. 

If a higher Tg material is required, we do stock a 170Tg version of our standard FR-4 material as well, that can be selected in the quoting process. 

Note: The 170Tg FR-4 material has equivalency for electrical and mechanical properties with the popular Isola 370HR material, and functions very similarly. There is one documented physical difference, Isola's 370HR is listed as a 180Tg material.    

Sunstone's Standard FR-4 Material Properties