摘要:
A deposition rate of a dielectric material is varied with the electrical polarity of an underlying layer to obtain excellent deposition and planarization characteristics. A conductive layer and the underlying dielectric are surface-treated to have different electrical polarities so that the dielectric is formed by using the difference of deposition rates of the dielectric material between that on the conductive layer and that on the underlying dielectric. A CVD apparatus having a DC power source connected between a susceptor and a gas injection portion thereof is provided. The deposition and planarization can be performed at low temperatures and are simplified in process.
摘要:
A capacitor having high capacitance using a silicon-containing conductive layer as a storage node, and a method for forming the same, are provided. The capacitor includes a storage node, an amorphous Al2O3 dielectric layer, and a plate node. The amorphous Al2O3 layer is formed by a method in which reactive vapor phase materials are supplied on the storage node, for example, an atomic layered deposition method. Also, the storage node is processed by rapid thermal nitridation before forming the amorphous Al2O3 layer. The amorphous Al2O3 layer is densified by annealing at approximately 850° C. after forming a plate node, to thereby realize the equivalent thickness of an oxide layer which approximates a theoretical value of 30 Å.
摘要翻译:提供一种使用含硅导电层作为存储节点具有高电容的电容器及其形成方法。 电容器包括存储节点,非晶Al 2 O 3介电层和板状节点。 通过在存储节点上提供反应性气相材料的方法,例如原子层状沉积法,形成无定形Al 2 O 3层。 此外,在形成无定形Al 2 O 3层之前,通过快速热氮化处理存储节点。 通过在形成板状节点之后在约850℃下进行退火来致密化非晶Al 2 O 3层,从而实现近似理论值的氧化物层的等效厚度。
摘要:
A method of forming a metal interconnection includes the steps of forming a first conductive layer on a substrate, and forming an insulating layer on the first conductive layer and on the substrate. A contact hole is formed in the insulating layer thereby exposing a portion of the first conductive layer, a barrier layer is formed on the exposed portion of the first conductive layer in the contact hole, and a thermal treatment is performed on the barrier layer. After the step of performing the thermal treatment, a wetting layer is formed on a sidewall of the contact hole, and a second conductive layer is formed on the barrier layer and on the wetting layer in the contact hole.
摘要:
A ferroelectric memory device includes a silicon-on-insulator substrate having a handling wafer, a first insulating layer, and a semiconductor layer. It also includes a first conductive layer used as a bit line formed in the first insulating layer, a source region formed in the semiconductor layer, a drain region formed in the semiconductor layer, a second insulating layer formed over the semiconductor layer between the source and drain regions, a second conductive layer for use as both a lower electrode and gate electrode, formed over the second insulating layer between the source and drain regions, a ferroelectric layer formed over the semiconductor layer, and a third conductive layer for use as an upper electrode formed over the ferroelectric layer. For reading, writing, and erasing, different voltages are applied to the upper electrode and the semiconductor layer between the drain and source. For writing, the upper electrode receives a writing voltage, and the semiconductor layer receives a ground voltage. This brings the drain and source to a floating state to either invert polarization of the ferroelectric layer or retain initial polarization, depending upon the data. For erasing, the upper electrode receives an erasing voltage, and the semiconductor layer receives a ground voltage. This brings the drain and source to a floating state. For reading, the upper electrode receives a reading voltage, and the semiconductor layer receives a ground voltage. A sensing current is then provided to the drain, and potential variation is sensed on the bit line.
摘要:
An ultra high integration DRAM cell and a method of manufacturing therefor are provided which increases the capacitance of the cell capacitor. The plate electrode consists of the second and fourth polycrystalline silicon layers; the storage electrode consists of the third polycrystalline silicon layer; the dielectric layer is increased by the area of the first dielectric layer.
摘要:
A capacitor having high capacitance using a silicon-containing conductive layer as a storage node, and a method for forming the same, are provided. The capacitor includes a storage node, an amorphous Al2O3 dielectric layer, and a plate node. The amorphous Al2O3 layer is formed by a method in which reactive vapor phase materials are supplied on the storage node, for example, an atomic layered deposition method. Also, the storage node is processed by rapid thermal nitridation before forming the amorphous Al2O3 layer. The amorphous Al2O3 layer is densified by annealing at approximately 850° C. after forming a plate node, to thereby realize the equivalent thickness of an oxide layer which approximates a theoretical value of 30 Å.
摘要:
A method for forming a metal layer of an ultra-thin film according to metal deposition conditions and a method for forming metal wiring by filling a high aspect-ratio contact hole using cooling step prior to depositing the metal layer. In particular, the additional cooling process is performed before the process of depositing the metal layer and then the deposition process is performed in a state where the temperature of the wafer has been cooled down to a temperature in the range between -25.degree. C. and room temperature. The surface morphology of the deposited metal layer is improved and a continuous ultra-thin film can be obtained. Also, the aluminum filling characteristics in the contact hole having a high aspect-ratio are improved.
摘要:
Integrated circuit devices include a first dielectric layer, an electrically insulating layer on the first dielectric layer and an an aluminum oxide buffer layer formed by atomic layer deposition (ALD) and stabilized by heat treatment at a temperature of less than about 600.degree. C., between the first dielectric layer and the electrically insulating layer. The first dielectric layer may comprise a high dielectric material such as a ferroelectric or paraelectric material. The electrically insulating layer may also comprise a material selected from the group consisting of silicon dioxide, borophosphosilicate glass (BPSG) and phosphosilicate glass (PSG). To provide a preferred integrated circuit capacitor, a substrate may be provided and an interlayer dielectric layer may be provided on the substrate. Here, a metal layer may also be provided between the interlayer dielectric layer and the first dielectric layer. The metal layer may comprise a material selected from the group consisting of Pt, Ru, Ir, and Pd.
摘要:
A deposition rate of a dielectric material is varied with the electrical polarity of an underlying layer to obtain excellent deposition and planarization characteristics. A conductive layer and the underlying dielectric are surface-treated to have different electrical polarities so that the dielectric is formed by using the difference of deposition rates of the dielectric material between that on the conductive layer and that on the underlying dielectric. A CVD apparatus having a DC power source connected between a susceptor and a gas injection portion thereof is provided. The deposition and planarization can be performed at low temperatures and are simplified in process.