6OZ Thick Copper Pcb Board

Product name:thick copper pcb board  CharacteristicLayer count: 4 Board thickness: 3.0mm Base materials: FR4 Finished size:175*164mm Surface finish:ENIG Line width/line space: 12/12mil Minimum hole: 0.4mm Solder resist color: Sensitive green Cu thickness: inner layer 6OZ outer layer 6OZThe outstanding feature: the outer copper thickness of the finished products is 6oz and the interior layer is 6oz, it usually used in high power equipment. Specifications:1.needs electroplated method to thicker the base copper in it's both sides. increased copper thickness reaches to above 2 oz2.before the lamination, it needs to stuff resin to the inner layer 3.etching of the inner circuit and outer circuit is difficult 4.solder mask need printing for many times