... 0mmCu Thickness:35um-180umAluminium Model:3003,5052,6060,6061Breakdown Voltage:AC>2KV-4KV DC>2KV-6KVThermal Conductivity:2.0-3. ... :Above eight-layer board:270*280mmSurface finishing :HASL,LFHASL,HAL,Chemical Tin,Chemical Gold,Immersion Sliver/Gold,OSP,Gold PlatingSolder ... /ceramic boards ;Nowadays , ZXH has become a large scale PCB manufacturer in China .ZXH headquarters in Longgang District of Shenzhen ...