Abstract:
PURPOSE: A memory device forming method is provided to prevent the damage to a bottom electrode by forming an etching prevention layer of multi layer. CONSTITUTION: A bottom electrode(140) is formed on a substrate(100). A first etch stopping layer(150) and a second etch stopping layer(155) are formed on the bottom electrode. An insulating layer(160) is formed on the etch stopping layer. A recess area is formed to expose the bottom electrode by patterning the insulation layer and the etching prevention layer.
Abstract:
PURPOSE: A semiconductor phase change memory device is provided to make data storage structure, data contact structure, and a data line overlapped with each other by burying the data storage structure, the data contact structure, and the data line into the opening of the insulating layer. CONSTITUTION: A data Line(105) is formed on an active area(10). A data storage structure(55) locates under the data line. The data storage structure comprises a concave part along the data line. The data storage structure has the same center as the data line. The data contact structure includes a lower side filling the concave part of the data storage structure and also includes upper side surrounding the data line. A pad electrode(25) is arranged under data contact structure and data line.
Abstract:
PURPOSE: A method for forming a resistance variable memory device is provided to reduce a manufacturing time of a variable resistance memory by forming an amorphous semiconductor layer and improving the speed of forming a diode. CONSTITUTION: In a method for forming a resistance variable memory device, an insulating layer having an opening on a substrate(100) is formed. An epilayer(130) is formed on the opening from the substrate by a first height(A1). An amorphous semiconductor layer(140) is formed on the epilayer. The amorphous semiconductor layer and the epilayer are recessed by a second height. The first height is higher than the second height.
Abstract:
PURPOSE: A semiconductor device and a method for forming the same are provided to form a semiconductor pattern into a uniform mono-crystalline state by forming the semiconductor pattern with a selective epitaxial growth process. CONSTITUTION: An etching stop layer(120) and an interlayer insulation layer(130) are successively formed on a substrate(110). An opening and an under-cut region are formed. The opening successively passes through the etching stop layer and the interlayer insulation layer. A semiconductor pattern(140) is formed in the opening by performing a selective epitaxial growth process. A spacer is formed in the under-cut region. The spacer and the semiconductor pattern are simultaneously formed.
Abstract:
A phase change random access memory device and a method for fabricating thereof are provided to increase current driving capacity of a switching device, so increasing integration. A pin body(108) having an upper side and side walls are protruded from a semiconductor substrate(102). A first and a second impurity region(116a,116b) are formed in the pin body while being separated each other. A gate electrode(112) covers the pin body formed at the first and a second impurity region. A data storage element is electrically connected with one of the first and second impurity region and it includes a phase change material film(130), a first electrode, and a second electrode.
Abstract:
The damage of phase transition pattern can be prevented even if the alignment error caused by photolithography is generated while forming the bit line. Also, the high integration can be easily achieved. The manufacturing method of the memory device having the self-aligned electrode is provided. The interlayer insulating film(57) having the contact hole(57H) on the substrate(51) is formed. The phase transition pattern which partly fills the contact hole is formed. The bit line(93) which passes across the interlayer insulating film phase is formed, including the bit extension part(93E) self-aligned in the phase transition pattern. The bit extension part can be extended inside the contact hole on the phase transition pattern. The bit extension part is contacted with the phase transition pattern.
Abstract:
A method for manufacturing a semiconductor device having a self-aligned cell diode and a method for manufacturing a phase-change memory device using the same are provided to restrain increase of electrical resistance due to a mis-alignment of the word lines and cell diodes by using self-cell diodes being self-aligned with word lines. A conductive layer is formed on a semiconductor substrate(40). A dielectric(44) is formed on the conductive layer. The dielectric and the conductive layer are patterned in turn to form isolation trenches for exposing the substrate and word lines(WL) defined by the isolation trenches. An isolation layer(54) is formed to gap-fill the isolation trenches. Cell contact holes pass through to expose the word lines. The cell contact holes are defined by the adjacent isolation layer to be self-aligned with the word lines. Cell diodes gap-fill the cell contact holes. When the isolation trenches and the word lines are formed, a first hard mask layer is formed on the dielectric, the first hard mask layer is patterned to form a line-shaped first preliminary hard mask patterns(46'), and the dielectric is etched by using the first preliminary hard mask patterns as etch masks.
Abstract:
셀 다이오드들을 채택하는 상변이 기억소자들을 제공한다. 상기 상변이 기억소자들은 제1 도전형의 반도체 기판 및 상기 반도체 기판 상부에 형성된 제1 층간절연막을 구비한다. 상기 제1 층간절연막을 관통하는 셀 다이오드 홀이 제공된다. 상기 셀 다이오드 홀의 하부 영역 내에 제1 및 제2 반도체 패턴들이 차례로 적층된다. 상기 제2 반도체 패턴 상에 셀 다이오드 전극이 제공된다. 상기 셀 다이오드 전극은 상기 제1 층간절연막의 상부면보다 낮은 표면을 갖는다. 상기 셀 다이오드 전극 상에 상기 셀 다이오드 홀을 채우는 국한된 상변이 물질 패턴(confined phase change material pattern)이 제공된다. 상기 국한된 상변이 물질 패턴 상에 상부전극이 배치된다. 상기 셀 다이오드 홀 내의 상기 국한된 상변이 물질 패턴은 상기 셀 다이오드 홀에 의해 상기 제1 및 제2 반도체 패턴들과 자기정렬된다. 상기 상변이 기억소자의 제조방법들 역시 제공된다.
Abstract:
본 발명에 따른 반도체소자의 제조방법을 개시한다. 본 발명은 반도체기판에 소정 깊이를 갖는 트랜치를 형성한 다음, 트랜치의 내,외측에 CVD산화막을 형성하고 그 전면에 모노 실렌계의 폴리실리콘막을 형성한 후, 이를 열산화시켜 열산화막을 형성하여 트랜치를 채우게 된다. 따라서, 트랜치의 갭필용으로 CVD산화막을 증착할 때 트랜치내에 발생되는 보이드를 방지할 수 있어 트랜치의 갭필 특성을 향상시킬 수 있다.
Abstract:
PURPOSE: A semiconductor device with tungsten a plug cell pad is provided to minimize heat budget on the device during a deposition process and contact resistance between a contact plug and poly cell pad. CONSTITUTION: Gates(210) are formed on a semiconductor substrate(200) and then using them as a mask, active regions are formed. Spacers(220) are formed on the sidewall of gates(210) and an interlayer dielectrics(230) is formed on the resultant structure. The interlayer dielectrics is etched by using a cell pad photoresist, opening the gap between the spacers, as a mask to form an opening, through which ions are implanted on the exposed active region, so that contact ion implementation layer(240) is formed. A barrier metal layer(255) is formed on the resultant surface. A tungsten pad layer(265) is deposited around the temperature of 200 degree C. A planarization process such as CMP or etch-back one is done on the whole structure to form a tungsten cell pad.