Method for fixation onto layer comprising amorphous carbon film, and laminate
A method for fixation, onto a layer comprising an amorphous carbon film and provided on a base material, of a layer comprising a material condensation-reacting with hydroxyl groups on a surface of the amorphous carbon film, whereby, in the layer comprising an amorphous carbon film and provided on the base material, the amorphous carbon film can have a holding power which is strong enough to fix the layer comprising a material condensation-reacting with a hydroxyl group on the surface of the amorphous carbon film and can have uniformity of the holding power. Si and O are added into the layer comprising an amorphous carbon film to thereby improve adhesion durability and binding uniformity of the layer comprising a material condensation-reacting with a hydroxyl group. Particularly, by using a fluorine-based silane coupling agent, it is possible to impart high functions such as water repellency/oil repellency, abrasion resistance, chemical resistance, low friction properties and non-tackiness to the amorphous carbon film.
1. A laminate comprising:
a base material;
an amorphous carbon film positioned directly on the base material, in which the amorphous carbon film comprises silicon and oxygen on a surface thereof and inside thereof, and hydroxyl groups on a surface thereof; and
a coupling agent film positioned on a top surface of the amorphous carbon film and configured to condensation-react with the hydroxyl groups on the surface of the amorphous carbon film,
wherein the amorphous carbon film has a higher concentration of oxygen in a first region at the top surface than in a second region at the bottom surface.
2. The laminate according to claim 1 , wherein the coupling agent film is configured to condensation-react by comprising a water repellent material or a water repellent/oil repellent material.
3. The laminate according to claim 1 , wherein the coupling agent film is configured to condensation-react by comprising a fluorine-based silane coupling agent.
4. The laminate according to claim 1 , wherein the layer comprising an amorphous carbon film is composed of two or more layers, and Si and O are added into at least an uppermost layer of the two or more layers.
5. The laminate according to claim 1 , wherein the amorphous carbon film contains oxygen at a uniform concentration across the region adjacent to the top surface.
6. The laminate according to claim 1 ,
wherein the amorphous carbon film exhibits a peak of Si—O bonds in a region between wavenumbers of 1200-1300 cm −1 through Fourier transform infrared spectroscopy (FT-IR).