Draft Document - Materials for printed boards and other interconnecting structures - Part 2-31: Reinforced base materials clad and unclad for high frequency application - Halogenated modified or unmodified resin system, woven E-glass laminated sheets of defined relative permittivity (equal or less than 4.1 at 1 GHz) and flammability (vertical burning test), copper-clad (IEC 91/671/CDV:2007); German version prEN 61249-2-31:2007
文件草案.文件草案.印制板和其他互连结构用材料.第2-31部分:高频应用的包覆和非包覆增强基材.卤化改性或未改性树脂系统.规定相对介电常数的编织E玻璃层压板