REE4100 is a self-developed product with high temperature resistance up to 320 °C.It can can effectively improve the board surface shrinkage problem with its low shrinkage in the X-Y axis direction and stable size. REE4100 has multi-layer structure, and good covering filling ability. The film surface is smooth and uniform, which ensures the pressure balance, and plays a certain leveling and anti-wrinkle effect. It is widely used in LCP laminating and other high-temperature lamination processes.