1. Synthetic stone is a kind of high-temperature nano-composite material, which shows excellent physical properties at gradually rising temperature. 2. After repeated plate loading process, still can maintain the size, dimensional stability and flatness. 3. Low heat transfer to ensure low heating degree of the substrate. 4. The synthetic resin composition of synthetic stone can effectively block flux activity and prevent gene tip formation. 5. Thickness according to PCB parts height can choose 3,4,5,6, ... 12 mm.