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

Claim 15:
16. A crosslinkable prepolymer composition configured to form a contrast layer on a block copolymer film, said crosslinkable prepolymer composition comprising: a prepolymer comprising a plurality of functional monomers and at least one crosslinkable functional group within its polymer chain,
a first crosslinking agent adapted to initiate crosslinking of said prepolymer in response to a specific stimulation thereto to form a first crosslinked area having a first affinity with respect to blocks of the block copolymer film, and
a second crosslinking agent that is chemically different from the first crosslinking agent and that is adapted to initiate crosslinking of said prepolymer in response to a specific stimulation thereto to form a second crosslinked area having a second affinity with respect to the blocks of the block copolymer film,
wherein said second affinity is opposite to the first affinity.