Abstract:
PURPOSE: A memory for manufacturing a multi-level cell for storing multiple bits data in one memory cell using a phase change material with three or more parallel structures is provided to identify resistance values by differentiating set resistance values based on the composition ratio and the kinds of the phase change material. CONSTITUTION: Three or more lower electrodes(220, 222, 224) are parallely formed on a contact plug(210). Three or more phase change materials(330, 332, 334) are parallely formed on the lower electrodes. The phase change materials correspond to the lower electrodes. An upper electrode is formed on the phase change materials. A part of the upper part of the lower electrodes is removed. The phase change materials are embedded in the removed space.
Abstract:
A data store layer pattern having the small width than 100nm in the forming process can be not damaged, and the data store layer pattern can be steadily molded. Accordingly, the reliability and performance characteristic of the memory device including data store layer pattern can be improved. The first insulating layer(120) including the first conductive pattern(125) on the substrate(110) is formed. The laminated data store layer pattern(135), and the second conductive pattern(145) and sacrificial layer pattern are formed on the first conductive pattern. The second insulating layer(160) is formed on the sacrificial layer pattern. The second insulating layer is patterned and then the first hole to expose the sacrificial layer pattern is formed. The sacrificial layer pattern is removed, and then the second hole to expose the second conductive pattern is formed. The third conductive pattern(190) connected to the second conductive pattern within the first and second holes is formed.
Abstract:
A phase change material memory device and a method for forming the same are provided to reduce the contact area between the conductor and the phase change material layer. A phase change material memory device comprises the first insulating layer(60) which is provided to the top of the substrate and limits the opening(70); the first part provided to the bottom of the opening; the first conductor(95) including the second part which successively is provided from the first part along the side wall of opening; the variable resistance(113) which is connected to the second part of the first conductor and is provided along the side wall of opening; the second conductor provided on the variable resistance.
Abstract:
A method for cleaning a deposition chamber is provided to improve operational efficiency of deposition equipment and to secure a stable process condition by reducing a cleaning process time. A wafer unloading process is performed to unload a wafer from a chamber for performing a deposition process under a predetermined deposition condition(10). A cleaning gas supply process is performed to supply a cleaning gas into the chamber without causing a change of deposition temperature and a change of process atmosphere(20). An excitation process is performed to excite the cleaning gas within the chamber(30). A reactant exhausting process is performed to exhaust a reactant by inducing a reaction between the excited cleaning gas and a deposit within the chamber(40).
Abstract:
A phase change memory device having a small transition volume and a method for forming the same are provided to reduce remarkably current necessary for converting the transition volume to a crystalline state or an amorphous state. A bottom electrode(75) is formed on a top surface of a substrate(51). An interlayer dielectric includes a contact hole for exposing the bottom electrode and is formed to cover the interlayer dielectric. A resistant material pattern(79) is formed to fill up the contact hole. A phase change pattern(77) is inserted between the resistant material pattern and the interlayer dielectric and is extended between the resistant material pattern and the bottom electrode. A top electrode(85) comes in contact with the phase change pattern. The resistant material pattern has a resistance higher than that of the phase change pattern. The top electrode is electrically connected through the phase change pattern to the bottom electrode.
Abstract:
상변화 물질층의 형성 방법과, 그 방법을 이용한 상변화 기억 소자의 형성 방법 및 상변화 기억 소자를 제공한다. 본 발명에 따르면, 상변화 물질층을 선택적으로 형성함으로써, 보이드 및 심 없이 홀을 채우는 상변화 패턴을 구현할 수 있다. 이로써, 상변화 기억 소자의 특성 저하를 방지하고, 고집적화 및/또는 저소비전력화에 최적화된 상변화 기억 소자를 구현할 수 있다.