摘要:
A cylindrical capacitor comprising at least a substrate, a cylindrical bottom electrode, a structure layer, a top electrode and a capacitor dielectric layer is provided. The substrate has several plugs. The cylindrical bottom electrodes are disposed on the substrate and electrically connected to the respective plugs. The structure layer surrounds the periphery of each cylindrical bottom electrode. The structure layers that surround the two opposing cylindrical bottom electrodes have no mutual contact while the structure layers that surround two neighboring cylindrical bottom electrodes contact each other. Furthermore, the top electrodes cover the respective cylindrical bottom electrodes and the capacitor dielectric layer is disposed between each top electrode and corresponding cylindrical bottom electrode. Due to the structure layers, the mechanical strength of the whole cylindrical capacitor is improved and the density of the capacitor can be increased.
摘要:
A cylindrical capacitor comprising at least a substrate, a cylindrical bottom electrode, a structure layer, a top electrode and a capacitor dielectric layer is provided. The substrate has several plugs. The cylindrical bottom electrodes are disposed on the substrate and electrically connected to the respective plugs. The structure layer surrounds the periphery of each cylindrical bottom electrode. The structure layers that surround the two opposing cylindrical bottom electrodes have no mutual contact while the structure layers that surround two neighboring cylindrical bottom electrodes contact each other. Furthermore, the top electrodes cover the respective cylindrical bottom electrodes and the capacitor dielectric layer is disposed between each top electrode and corresponding cylindrical bottom electrode. Due to the structure layers, the mechanical strength of the whole cylindrical capacitor is improved and the density of the capacitor can be increased.
摘要:
A method for forming interconnection plugs comprising the steps of providing a substrate having a dielectric layer formed thereon, wherein an opening exposing a pad area for connection with other structures is also formed in the dielectric layer. Next, a glue layer is formed over the pad area and the dielectric sidewalls of the opening. Subsequently, plug material is deposited into the opening forming a plug layer. This is followed by etching back the plug layer to return the plug material inside the opening to a level below the height of the dielectric layer. Then, a selective etching method having a high selectivity ratio between the dielectric layer and the plug layer is used to etch the dielectric layer. Finally, the dielectric layer and the plug layer are etched to almost the same level of height. The characteristic of this invention is the utilization of the higher etching r!ate of dielectric material with respect to the plug material so that the dielectric layer is etched back to the same level of height as the plug layer. Hence, the formation of recesses on the plug surface and the surface of subsequently deposited metallic layer is avoided.
摘要:
A method for fabricating a semiconductor device to lower source/drain sheet resistance is provided. A dielectric layer with a plurality of contact windows is formed on a semiconductor device. Next, selective epitaxial growth (SEG) is implemented, and then a metal layer is sputtered. After that, a silicide is formed by heat treatment. In another embodiment, selective epitaxial growth is implemented first, and then a dielectric layer with a plurality of contact windows is formed. Then, a metal layer is sputtered, and a silicide is then formed by heat treatment. Since the silicide is formed by way of SEG, the silicon substrate will not be consumed during the process of forming the silicide, and the depth of the junction region is maintained, and the source/drain sheet resistance is lowered.
摘要:
A magnetic random access memory with reduced currents in a bit line and a manufacturing method thereof. In one embodiment, the memory includes a bottom electrode, a first dielectric layer on the bottom electrode, a via in the first dielectric layer, a magnetic tunnel junction (MTJ) element that is aligned with and formed on a via, and a metal layer that is formed on and in contact with an MTJ element. In another embodiment, a second dielectric layer is formed on the first dielectric layer, and a metal layer is formed on and in contact with an MTJ element and the second dielectric layer. These designs can protect the MTJ element from damage during the etching process. Hence it increases the stability and the yield rate during the manufacturing process. Furthermore, the designs can reduce the current requirements of running magnetic cells, thereby reducing power consumption.
摘要:
A method for manufacturing a semiconductor device is provided. First, a first metal conductive line is formed, and then a semiconductor device is formed on the first metal conductive line. A dielectric layer is formed on the semiconductor device. A contact window is formed at a position in the dielectric layer corresponding to the first metal conductive line. Then, a metal plug is formed in the contact window. The metal plug is used as a mask for etching the semiconductor device, such that the etched semiconductor device takes the form of a shape corresponding to the metal plug. Through the manufacturing method, the semiconductor device is formed according to the shape of the metal plug and is completely aligned with the metal plug.
摘要:
A method of fabricating a device is described. A substrate having at least two isolation structures is provided. A first oxide layer and a first conductive layer are sequentially formed on the substrate between the isolation structures. A first nitridation process is performed to form a first nitride layer on the surface of the first conductive layer and a first oxynitride layer on the surface of the isolation structures. A second oxide layer is formed on the first nitride layer and first oxynitride layer. A densification process is performed to oxidize the first oxynitride layer on the surface of the isolation structures. A second nitride layer and a third oxide layer are sequentially formed on the second oxide layer. A second nitridation process is performed to form a third nitride layer on the surface of the third oxide layer. A second conductive layer is formed on the third nitride layer.
摘要:
A method for fabricating a semiconductor device to lower source/drain sheet resistance is provided. A dielectric layer with a plurality of contact windows is formed on a semiconductor device. Next, selective epitaxial growth (SEG) is implemented, and then a metal layer is sputtered. After that, a silicide is formed by heat treatment. In another embodiment, selective epitaxial growth is implemented first, and then a dielectric layer with a plurality of contact windows is formed. Then, a metal layer is sputtered, and a silicide is then formed by heat treatment. Since the silicide is formed by way of SEG, the silicon substrate will not be consumed during the process of forming the silicide, and the depth of the junction region is maintained, and the source/drain sheet resistance is lowered.
摘要:
A cylindrical capacitor comprising at least a substrate, a cylindrical bottom electrode, a structure layer, a top electrode and a capacitor dielectric layer is provided. The substrate has several plugs. The cylindrical bottom electrodes are disposed on the substrate and electrically connected to the respective plugs. The structure layer surrounds the periphery of each cylindrical bottom electrode. The structure layers that surround the two opposing cylindrical bottom electrodes have no mutual contact while the structure layers that surround two neighboring cylindrical bottom electrodes contact each other. Furthermore, the top electrodes cover the respective cylindrical bottom electrodes and the capacitor dielectric layer is disposed between each top electrode and corresponding cylindrical bottom electrode. Due to the structure layers, the mechanical strength of the whole cylindrical capacitor is improved and the density of the capacitor can be increased.