▎ 摘　　要

NOVELTY - The electrochemical etching method involves forming an anode (110) having a graphene layer (118) formed on a metal substrate layer (120), then forming an electrically conductive polymer on the graphene layer such that metal plate is coupled to graphene layer. A metal substrate layer is disposed in electrolyte (115) then a cathode (108) electrically connected to power source (102), is disposed in electrolyte. The graphene layer and metal substrate layer are connected to power source to supply a current through anode and electrolyte such that metal substrate layer is etched from graphene layer. USE - Electrochemical etching method used for metal substrate. ADVANTAGE - Delivers higher current through metal substrate layer without damaging the graphene layer while flowing current flows through the full surface of the graphene layer and the metal substrate layer, since the first end of the wire is connected to the metal plate. Reduces overall etching time since etching time is independent from the remaining thickness of metal substrate layer, thus achieving large scale production of graphene. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for an anode forming method. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the electrochemical etching apparatus. Power source (102) Cathode (108) Anode (110) Electrolyte (115) Graphene layer (118) Metal substrate layer (120)