Patent ID: 8277929

Claim:
A method for modifying a surface of a substrate, the method comprising the steps of: (1) forming a polysilazane coating by applying a polysilazane onto a surface of the substrate; (2) applying an organic compound directly in liquid form at ambient temperatures, or applying a solution of the organic compound dissolved in an organic solvent without a hydroxyl group, onto a surface of the polysilazane coating, wherein the organic compound is a polyalkyleneglycol having a main backbone that comprises an organic group represented by the following formula [1]: —[RO] n —, wherein R represents an alkylene group having 1 to 4 carbon atoms, and n represents a positive number of not less than 2, and wherein the polyalkyleneglycol further has hydroxyl groups at one or both molecular terminals; and (3) after performing steps (1) and (2) above, heating the substrate, thereby converting the polysilazane to silica so that the polysilazane coating forms a silica layer, and chemically bonding the organic compound to the silica of the silica layer.