Abstract:
상변화 메모리 유닛은 트렌치가 형성된 하부 전극, 제1 충진 부재, 제2 충진 부재, 상변화 물질층 패턴 및 상부 전극을 포함한다. 제1 충진 부재는 트렌치를 부분적으로 매립한다. 제2 충진 부재는 제1 충진 부재 상에 형성된다. 상변화 물질층 패턴은 하부 전극 및 제2 충진 부재 상에 형성되며, 상부 전극은 상변화 물질층 패턴 상에 형성된다. 제1 충진 부재가 도전성을 가지더라도, 제2 충진 부재가 절연성을 가지기 때문에 상변화 물질층 패턴을 가열하는 효율을 증대시켜 리셋 전류를 감소시킬 수 있다. 제1 충진 부재가 실리콘을 포함하는 경우, 오믹층의 열적 손상을 방지할 수 있다. 또한, 하부 전극의 상부를 질화 및/또는 산화시켜 비저항을 높일 수 있으므로 상변화 물질층 패턴을 가열하는 효율을 높여 리셋 전류를 보다 감소시킬 수 있다.
Abstract:
The method for manufacturing the non-volatile memory device is provided to improve the reliability of the non-volatile memory device by using the metal silicide layer as the ohmic layer of the vertical cell diode. The semiconductor patterns(132,134) are formed on the substrate. The metal layer is formed in the semiconductor pattern. At least two mixed phase metal silicide layer (136a) is formed by reacting the semiconductor pattern and the metal layer. The substrate in which the mixed phase metal silicide layer is formed is exposed to the etching gas. The second thermal process is performed in about 540°C or about 600°C. The mixed phase metal silicide layer includes the CoSi phase and CoSi2 phase. After he substrate in which the mixed phase metal silicide layer is formed is exposed to the etching gas. The substrate is heat-treated and is transformed from the mixed phase metal silicide layer to the single phase metal silicide layer.
Abstract:
A method for manufacturing a semiconductor device is provided to improve uniformity of the line width of a lower electrode by protecting an insulating layer pattern by a first spacer in a cleaning process to remove a native oxide layer. An insulating layer pattern which restricts an opening exposing a semiconductor substrate(100) partially and is protruded than the substrate surface from an inner part of the substrate. A first spacer(114) including the nitride is formed in the side of the insulating layer pattern. A second spacer(116) including the oxide is formed on the first spacer. An epitaxial silicon film is formed on the exposed substrate to reclaim a part of the opening. A cleaning process is performed to remove the native oxide film generated on the surface of the epitaxial silicon film. The ohmic layer(134) is formed on the epitaxial silicon film.
Abstract:
A phase-change memory and a manufacturing method thereof, and a phase change memory device including the same and a manufacturing method thereof are provided to reduce reset current by improving the efficiency of heating up a phase change material layer pattern. A phase-change memory unit comprises an isolation structure, a conductive construct(245), a bottom electrode(265), filling elements(277a,277b), a phase change material layer pattern(280) and an upper electrode(290). The isolation structure has an opening exposing a substrate(200). The conductive construct is formed within the opening. The bottom electrode is formed on the conductive construct. The bottom electrode has a recess. The recess is filled with the filling element. The phase change material layer pattern is formed on the bottom electrode and filling element. The upper electrode is formed on the phase change material layer pattern.