Abstract:
PURPOSE: A method of forming a metal thin film using an ALD(Atomic Layer Deposition), a method of forming a lanthanum oxide layer and a method of forming a high dielectric layer of a semiconductor device are provided to restrain a low dielectric layer from being formed on a surface of a lower electrode and to improve step coverage on the lower electrode by forming a metal oxide film using two-step depositing processes. CONSTITUTION: An oxygen-depleted metal oxide film(22) is formed on a semiconductor substrate(10) by performing the first ALD using the first reactant made of an organic metal compound. A metal oxide film(26) is formed on the oxygen-depleted metal oxide film by performing the second ALD using the second reactant made of the first reactant and an oxidizer. The first reactant contains lanthanum.
Abstract:
PURPOSE: An apparatus for depositing a semiconductor thin film is provided to decrease the number of valves installed in an oxidizing agent supplying line by using a gaseous oxidizing agent as carrier gas and by transferring a liquid oxidizing agent to a process chamber. CONSTITUTION: A reaction is performed in a process chamber(60). A reaction gas supply unit(73) supplies reaction gas or inert gas to the process chamber. An oxidizing agent supply unit(63) supplies an oxidizing agent to the process chamber. An exhaust unit(93) exhausts gas. The oxidizing agent supply unit supplies the first oxidizing agent to the process chamber or supplies the second oxidizing agent to the process chamber by using the first oxidizing agent as carrier gas.
Abstract:
PURPOSE: A method for forming an oxide layer by an atomic layer deposition(ALD) method is provided to increase a deposition rate and improve a deposition characteristic of a metal oxide layer by performing an ALD method using an oxidizing agent and a precursor including Hf and an amino group. CONSTITUTION: The surface of a substrate(1) is exposed to a precursor including an amino group to form a chemically absorbed precursor layer on the surface of the substrate. The chemically absorbed precursor layer is oxidized by using an oxidizing agent to form an oxide layer on the substrate.
Abstract:
PURPOSE: A method for fabricating a capacitor of a semiconductor memory device is provided to maximize capacitance and improve an electrical characteristic of the capacitor by densifying a dielectric layer while effectively eliminating the impurities inside the dielectric layer. CONSTITUTION: A lower electrode(20) is formed on a semiconductor substrate(10). A HfO2 dielectric layer(30) is formed on the lower electrode. A vacuum heat treatment process is performed on the HfO2 dielectric layer. An upper electrode is formed on the vacuum heat-treated HfO2 dielectric layer.
Abstract:
반도체소자및 그제조방법이제공된다. 액티브영역들을정의하는필드영역을갖는기판내에제1 방향으로신장되는게이트트렌치들이형성될수 있다. 각각의게이트트렌치내에매립게이트들이형성될수 있다. 각각의매립게이트상부의게이트트렌치들을채우고상기액티브영역들의상부표면위로돌출되어상기제1 방향으로신장되는게이트캡핑펜스들이형성될수 있다. 상기게이트캡핑펜스내에, 상기게이트캡핑펜스들을가로질러상기제1 방향과직교하는제2 방향으로신장되는비트라인트렌치들이형성될수 있다. 각각의비트라인트렌치의내벽상에절연체구조물들이형성될수 있다. 각각의비트라인트렌치를채우도록상기절연체구조물들상에비트라인들및 비트라인캡핑패턴들이적층될수 있다. 상기게이트캡핑펜스들에자기정렬되어인접한비트라인들사이의상기기판상에콘택패드들이형성될수 있다.
Abstract:
유전막 및 전극간의 계면 처리 기술을 이용하여 유전막 내의 산소 원자의 손실을 방지함으로써, 캐패시터의 정전 용량 및 신뢰성이 개선된 반도체 소자를 제공하는 것이다. 상기 반도체 소자는 제1 도전체, 상기 제1 도전체 상에 형성되는 산화물 유전막, 상기 산화물 유전막 상에 형성되고, 제1 형성 엔탈피(formation enthalpy)를 갖고, 산소를 공여하는 계면막, 및 상기 계면막 상에 접하여 형성되고, 상기 제1 형성 엔탈피보다 높은 제2 형성 엔탈피를 갖는 제2 도전체를 포함한다.