Patent ID: 11868044
Assignee: ARKEMA FRANCE
Field: Optics (Instruments)
Classification: CPC G  C | IPC C  G

Claim 0:
1. A method for structuring an interface material deposited on a block copolymer film, comprising the following steps:
depositing, on said block copolymer film, a prepolymer composition layer thereby creating a stack, said block copolymer comprising, on the one hand, a plurality of functional monomers and at least one crosslinkable functional group within its polymer chain and, on the other hand, two chemically different crosslinking agents, each agent being adapted to initiate crosslinking of said prepolymer in response to a stimulation specific thereto,
subjecting the stack thus created to a first stimulation localized on first areas, said first stimulation being selected from light radiation, ion bombardment, thermal stimulation, plasma, or an electrochemical process, so as to cause a crosslinking reaction of the molecular chains of said prepolymer by the action of a first one of crosslinking agents in said first areas subjected to said first stimulation, said first crosslinked areas obtained having a first affinity with respect to blocks of the underlying block copolymer,
subjecting the stack to a second stimulation selected from light radiation, ion bombardment, thermal stimulation, plasma, or an electrochemical process, so as to cause a crosslinking reaction of the molecular chains of said prepolymer by the action of a second one of said crosslinking agents in secondary areas not crosslinked after the first stimulation, said crosslinked secondary areas obtained, adjacent to the first areas, having a second affinity with respect to the blocks of the underlying block copolymer, the second affinity being opposite to the first affinity.