BS EN 61189-2-721:2015
电气材料, 印制板和其他互连结构和组合装置的试验方法. 互连结构材料试验方法. 采用分离介质谐振器在微波频率下测量覆铜层压板的相对介电常数和损耗角正切
Test methods for electrical materials, printed boards and other interconnection structures and assemblies. Test methods for materials for interconnection structures. Measurement of relative permittivity and loss tangent for copper clad laminate at microwa