Abstract: The inventive concept provides a substrate treating method. The substrate treating method includes pre-treating a substrate by cleaning the substrate; etching the substrate by supplying an etchant and heating a substrate supplied with the etchant; and post-treating the substrate after the etching the substrate, and wherein the pre-treating the substrate, the etching the substrate, and the post-treating the substrate are each performed in different chambers, a substrate on which the pre-treating the substrate is completed is transferred in a dry state to a chamber at which the etching the substrate is performed, and a substrate on which the etching the substrate is completed is transferred in a wetted state with a liquid to a chamber at which the post-treating the substrate is performed.

Abstract: Disclosed are a method for preparing a cardanol-based organic vulcanizing agent, including a step of reacting cashew nut extract with powdered sulfur, a cardanol-based organic vulcanizing agent obtained by the method, and a rubber compound and tire composition using the same. The rubber composition using the cardanol-based organic vulcanizing agent shows significantly improved expected mileage (FPS), tensile strength (T/S), non-vulcanized properties and wet traction as compared to the rubber composition using the conventional vulcanizing agent, and contributes to improvement of wear property of tires as final products in actual cars. Therefore, the cardanol-based organic vulcanizing agent can be applied advantageously to rubber compound compositions for tires used in rubber vulcanizing processes for tire treads.