Patent ID: 8710631

Claim:
A method of modifying a fluorinated polymer surface comprising the steps of: depositing a first layer on at least a portion of a fluorinated polymer surface, the first layer comprising a first polymer, the first polymer being a substantially perfluorinated aromatic polymer, wherein the first layer is deposited using a solution deposition technique; and depositing a second layer on at least a portion of the first layer, the second layer comprising a second polymer, the second polymer being an aromatic polymer having a lower degree of fluorination than said first polymer, whereby the second layer provides a surface on to which a substance having a lower degree of fluorination than the first polymer is depositable, wherein the first polymer is dissolved in a first solvent system comprising a fluorinated solvent and a non-fluorinated solvent and the ratio of fluorinated solvent:non-fluorinated solvent in the first solvent system is 5-1:1-5.