Abstract: The application relates to the process for producing a dielectric for a capacitor, the process for producing a capacitor and a capacitor. The process comprises the production of polymer chains from monomers by polymerization. In this process, some repeating units in the polymer chain are functionalized with reactive groups. The reactive groups branch off from the respective polymer chains. Furthermore, the reactive groups are suitable for reacting with a linker molecule. The reactive groups are therefore suitable for forming a covalent bond with a linker molecule. As a further process step, linker molecules are added to the polymer chains, each linker molecule having at least two chemical linking points, each of which is suitable for forming a covalent bond with a reactive group. Finally, crosslinking of the polymer chains is achieved by reactions of the linker molecules with two reactive groups.