Abstract: The disclosure relates to a tobacco material including a flavor material and a method of preparing the tobacco material. The tobacco material may have a core-shell structure in which a core includes a first tobacco mixture and a flavor material and is surrounded by a shell including a second tobacco mixture, such that the aerosol generating article including the tobacco material generates a characteristic flavor.

Abstract: An embodiment of the present disclosure discloses tobacco material including: a center portion including a flavor material; and an outer portion including a tobacco mixture, wherein the outer portion surrounds the center portion.

Abstract: The inventive concept provides a substrate treating apparatus. The substrate treating apparatus includes a housing having a treating space; a support unit configured to support a substate within the treating space; and a plasma source for generating a plasma by exciting a gas supplied to the treating space, and wherein the support unit includes: a chuck having the substrate mounted to a top surface thereof; and a ring member in a ring shape surrounding an outer side of the chuck, and the ring member includes a cut surface which divides the ring member and a holding member positioned at the cut surface which holds a position of the ring member which is divided by the cut surface.