摘要:
Methods of patterning features, methods of patterning material layers of semiconductor devices, and methods of manufacturing semiconductor devices are disclosed. In one embodiment, a method of patterning features includes providing a workpiece having a material layer disposed thereon. A hard mask is formed over the material layer. A first pattern is formed in an upper portion of the hard mask, and a second pattern is formed in the upper portion of the hard mask. The first pattern and the second pattern are formed in a lower portion of the hard mask and the material layer, forming the features in the material layer.
摘要:
A method of forming a floating gate structure is disclosed, and includes modifying the etch chemistry of a plasma treated reactive ion etch process using an inert atom to physically damage a dielectric region. The damaged dielectric region is subsequently etched using a wet etch process.
摘要:
A method for manufacturing a semiconductor device including a substrate to be processed having a conductive layer essentially consisting of platinum includes etching the conductive layer, and generating plasma and cleaning the substrate, to which an etching product adhere, by means of ions in the plasma. The cleaning includes heating the substrate to a first temperature, introducing gas, which contains chlorine and nitrogen and in which a ratio of chlorine atoms to nitrogen atoms is 9:1 to 5:5, and applying high-frequency power to an electrode, on which the substrate is placed.
摘要:
A method of etching a ferroelectric device 100 having a ferroelectric layer 112 between a top and a bottom electrode 114, 108 is disclosed herein. Hardmasks 116, 118 are deposited on the top electrode 114, two or more hardmasks being spaced apart by narrow first regions 115 and spaced apart from other hardmasks by wider second regions 117. The top electrode 114 and ferroelectric layer 112 are then etched to pattern the top electrode 114 thus forming capacitors 102, 104, and the bottom electrode 108 is etched by a process in which the second regions are etched more slowly than the second regions. Those capacitors having a first region between them have a common bottom electrode 108, but in the second regions the bottom electrode is severed. To pattern the bottom electrode 108, a fluorine-based chemistry followed thereafter by a CO-based chemistry are used in a two step etching process.
摘要:
A ferroelectric capacitor device, such as an FeRAM device is formed by forming a substrate extending in a first plane and comprising a number of layers of material, forming a hard mask layer on the substrate and forming a first layer of a first material on the hard mask layer. The hard mask shape is then defined by etching the hard mask layer. A second layer of the first material is deposited on the etched hard mask layer. The deposited second layer has one or more side surfaces extending substantially perpendicular to the plane of the substrate. The second layer and the number of layers forming the substrate are then etched to shape the ferroelectric capacitor device.
摘要:
A method for producing a hard mask and a hard mask for use in a capacitor device comprises the steps of applying a photosensitive sol-gel layer to the capacitor device, applying a pattern to the sol-gel layer to form a patterned layer and applying a thermal decomposition treatment to the patterned layer to convert it to a hard mask layer.
摘要:
A method for fabricating a device and a device, such as a ferroelectric capacitor, having a substrate, a contact plug through the substrate, a first barrier layer on the substrate, a first electrode on the first barrier layer, a dielectric layer on the first electrode, and a second electrode on the dielectric layer, comprises etching the second electrode and the dielectric layer of the device using a first hardmask, to shape the second electrode and the dielectric layer. The first hardmask is then removed and one or more encapsulating layers are applied to the second electrode and the dielectric layer. A further hardmask is applied to the one or more encapsulating layers. The first electrode is then etched according to the second hardmask down to the first barrier layer and the second hardmask is then removed from the one or more encapsulating layers.
摘要:
A ferroelectric capacitor device comprises a substrate, a contact plug passing through the substrate, a first electrode formed on the substrate, the first electrode being electrically connected to said plug, a ferroelectric layer formed on the first electrode, a second electrode formed on the ferroelectric layer, one or more first encapsulation layers on the second electrode, the encapsulation layers extending over the device, and one or more hydrogen storage material layers on the encapsulation layers. One or more second encapsulation layers may be formed on the one or more hydrogen storage material layers.
摘要:
A ferroelectric capacitor is fabricated using a noble metal hardmask. A hardmask is deposited on a top electrode of a capacitor stack comprising a ferroelectric layer sandwiched between the top electrode and a bottom electrode. The top electrode is patterned according to the pattern of the hardmask by etching at a first temperature. The top electrode serves as the noble metal hardmask and the ferroelectric layer is patterned according to the pattern of the top electrode at a second temperature lower than the first temperature, resulting in the top electrode having sidewalls beveled relative to a top surface of the top electrode etching. The bottom electrode is etched at a third temperature to form the capacitor.