Abstract:
Provided are a method of forming a carbon layer and a method of forming an interconnect structure. The method of forming a carbon layer includes providing a substrate including first and second material layers, forming a surface treatment layer on at least one of the first and second material layers, and selectively forming a carbon layer on one of the first material layer and the second material layer. The carbon layer has an sp2 bonding structure.
Abstract:
A graphene manufacturing apparatus includes a reaction chamber a substrate supporter configured to structurally support a substrate inside the reaction chamber; a plasma generator configured to generate a plasma inside the reaction chamber; a first gas supply configured to supply an inert gas into the reaction chamber at a first height from an upper surface of the substrate supporter in a height direction of the reaction chamber; a second gas supply configured to supply a carbon source into the reaction chamber at a second height from the upper surface of the substrate supporter in the height direction of the reaction chamber; and a third gas supply configured to supply a reducing gas into the reaction chamber, wherein the first to third gas supply units are disposed at different heights at a third height from the upper surface of the substrate supporter in the height direction of the reaction chamber.
Abstract:
Disclosed herein is a method of fabricating hexagonal boron nitride in which hexagonal boron nitride is epitaxially grown. A method of fabricating hexagonal boron nitride includes placing a catalytic metal in a chamber, the catalytic metal having a hexagonal crystal structure and having a lattice mismatch of 15% or less with hexagonal boron nitride (h-BN) in a chamber; and growing hexagonal boron nitride on the catalytic metal at a temperature of 800° C. or lower while supplying a nitrogen source and a boron source into the chamber.
Abstract:
A method of forming a transition metal dichalcogenide thin film on a substrate includes treating the substrate with a metal organic material and providing a transition metal precursor and a chalcogen precursor around the substrate to synthesize transition metal dichalcogenide on the substrate. The transition metal precursor may include a transition metal element and the chalcogen precursor may include a chalcogen element.
Abstract:
Provided are a metal chalcogenide thin film and a method and device for manufacturing the same. The metal chalcogenide thin film includes a transition metal element and a chalcogen element, and at least one of the transition metal element and the chalcogen element having a composition gradient along the surface of the metal chalcogenide thin film, the composition gradient being an in-plane composition gradient. The metal chalcogenide thin film may be prepared by using a manufacturing method including providing a transition metal precursor and a chalcogen precursor on a substrate by using a confined reaction space in such a manner that at least one of the transition metal precursor and the chalcogen precursor forms a concentration gradient according to a position on the surface of the substrate; and heat-treating the substrate.
Abstract:
A method of growing a two-dimensional transition metal dichalcogenide (TMD) thin film and a method of manufacturing a device including the two-dimensional TMD thin film are provided. The method of growing the two-dimensional TMD thin film may include a precursor supply operation and an evacuation operation, which are periodically and repeatedly performed in a reaction chamber provided with a substrate for thin film growth. The precursor supply operation may include supplying two or more kinds of precursors of a TMD material to the reaction chamber. The evacuation operation may include evacuating the two or more kinds of precursors and by-products generated therefrom from the reaction chamber.
Abstract:
A broadband multi-purpose optical device includes a semiconductor layer having a light absorption characteristic, a first active layer having a light absorption band different from a light absorption band of the semiconductor layer, a first two-dimensional (2D) material layer adjacent to the first active layer, and a first interfacial layer configured to control a pinning potential of the semiconductor layer and the first active layer. The broadband multi-purpose optical device may further include at least one second active layer, and may include a tandem structure that further includes at least one second 2D material layer. The first active layer and the second active layer may have different light absorption bands. The broadband multi-purpose optical device may further include a second interfacial layer adjacent to the first 2D material layer.
Abstract:
A semiconductor device includes a semiconductor layer, a metal layer electrically contacting the semiconductor layer, and a two-dimensional material layer between the semiconductor layer and the metal layer and having a two-dimensional crystal structure.
Abstract:
Provided are a method of preparing a graphene quantum dot, a graphene quantum dot prepared using the method, a hardmask composition including the graphene quantum dot, a method of forming a pattern using the hardmask composition, and a hardmask obtained from the hardmask composition. The method of preparing a graphene quantum dot includes reacting a graphene quantum dot composition and an including a polyaromatic hydrocarbon compound and an organic solvent at an atmospheric pressure and a temperature of about 250° C. The polyaromatic hydrocarbon compound may include at least four aromatic rings.
Abstract:
A semiconductor device includes a semiconductor layer, a metal layer electrically contacting the semiconductor layer, and a two-dimensional material layer between the semiconductor layer and the metal layer and having a two-dimensional crystal structure.