Reverse roughening treatment of electrolytic copper foil (RTF)

1、 Low roughness, excellent peel strength, high temperature elongation.

2、Superior chemical resistance good etching factor.

High frequency high-speed materials such as PTFE resin, hydrocarbon resin, PPO or PPE

5G high-speed signal transmission products can meet the needs of medium low loss circuit boards.

type		RTF (Reverse copper foil）					testmethod
copper thickness（µm）		9	12	15	18	35	IPC-TM-650
BASIS WEIGHT（g/m²）		80±5	105±5	133±5	150±5	280±5
Surface roughness （µm	Smooth surface	Rz≤3.0
Surface roughness （µm	matte side(Rz)	≤4.0	≤4.5	≤5.0	≤5.0	≤6.0
peel strength（kgf/cm)		≥0.8	≥0.8	≥0.8	≥0.9	≥0.9
tensile strength （kg/mm²）	ordinary temperature	≥28
tensile strength （kg/mm²）	high temperature180℃	≥15
Elongation rate（%）	ordinary temperature	≥4	≥4	≥5	≥5	≥5
Elongation rate（%）	high temperature180℃	≥3	≥4	≥4	≥4	≥5
penetrating point/pinhole（individual/m²）		penetrating point≤5，pinhole=0