Patent ID: 8168076

Claim:
A method for producing a mould for objects made of polymer material comprising the following steps: successive deposition of a barrier thin layer and a diamond-like carbon thin layer on at least a part of a metal support, and nanopatterning of the diamond-like carbon thin layer to form at least a nanopatterned surface designed to come into contact with said polymer material, wherein the diamond-like carbon thin layer is nanopatterned with a predefined pattern presenting a form factor of more than 1 by performing the following successive steps: formation, on a free surface of said diamond-like carbon thin layer, of a hard mask formed by a first dry-phase selective chemical etching operation through a void lattice delineated by nanoparticles deposited beforehand on a free surface of said hard mask, and formation of the predefined pattern in the diamond-like carbon thin layer by a second dry-phase selective chemical etching operation through the hard mask, the second dry-phase selective chemical etching operation stopping at an interface between the diamond-like carbon thin layer and the barrier thin layer, and wherein the barrier thin layer and the nano-patterned diamond-like carbon thin layer form a bilayer coating presenting a thickness comprised between about 100 nm and about 10 μm.