摘要:
Provided is a method of fabricating a shallow trench isolation (STI) structure having a high aspect ratio and improved insulating properties. The exemplary method includes filling a shallow trench isolation region opening with an undoped polysilicon layer, removing an upper portion of the undoped polysilicon layer to form a second opening having a reduced aspect ratio relative to the original opening and filling the second opening with an insulating material to complete the STI structure. Additional protective layers including silicon oxide, silicon nitride and/or a capping layer may be provided on the sidewalls of the opening before depositing the undoped polysilicon.
摘要:
A phase changeable memory device is manufactured by forming at least one insulating layer on a substrate. A preliminary first electrode is formed on the insulating layer. The preliminary first electrode is partially etched to form a first electrode electrically connected to the substrate. After the preliminary first electrode is formed, both sidewalls of the preliminary first electrode are partially etched isotropically to form a first electrode having a uniform width and height. A phase changeable material layer pattern and a second electrode are subsequently formed on the first electrode. Related devices also are described.
摘要:
Example embodiments of the present invention relate to an etching solution, a method of forming a pattern using the same, a method of manufacturing a multiple gate oxide layer using the same and a method of manufacturing a flash memory device using the same. Other example embodiments of the present invention relate to an etching solution having an etching selectivity between a polysilicon layer and an oxide layer, a method of forming a pattern using an etching solution using the same, a method of manufacturing a multiple gate oxide layer using the same, and a method of manufacturing a flash memory device using the same. An etching solution including hydrogen peroxide (H2O2) and ammonium hydroxide (NH4OH) by a volume ratio of about 1:2 to about 1:10 mixed in water. In a method of forming a pattern and methods of manufacturing a multiple gate oxide layer and a flash memory device, a polysilicon layer may be formed on a substrate. An insulation layer pattern including an opening exposing the polysilicon layer may be formed on the polysilicon layer. The polysilicon layer exposed by the insulation layer pattern may be etched using the etching solution. A polysilicon layer pattern may be formed on the substrate using the etching solution.
摘要翻译:本发明的示例性实施例涉及一种蚀刻溶液,使用该方法形成图案的方法,使用该蚀刻溶液的多栅极氧化物层的制造方法以及使用其制造闪存器件的方法。 本发明的其它示例性实施例涉及在多晶硅层和氧化物层之间具有蚀刻选择性的蚀刻溶液,使用其使用蚀刻溶液形成图案的方法,使用该栅极氧化物层的方法 以及使用其制造闪存器件的方法。 包含过氧化氢(H 2 O 2 O 2)和氢氧化铵(NH 4 OH)的体积比约为1:2的蚀刻溶液 至约1:10混合在水中。 在形成图案的方法和制造多栅极氧化物层和闪存器件的方法中,可以在衬底上形成多晶硅层。 可以在多晶硅层上形成包括露出多晶硅层的开口的绝缘层图案。 可以使用蚀刻溶液蚀刻由绝缘层图案暴露的多晶硅层。 可以使用蚀刻溶液在衬底上形成多晶硅层图案。
摘要:
In a method of processing a semiconductor structure and a method of forming a capacitor for a semiconductor device using the same, a semiconductor structure may be cleaned using a cleaning solution having a surface tension lower than that of water. The semiconductor structure may be dried in an isopropyl alcohol vapor atmosphere.
摘要:
Embodiments of the invention include a megasonic energy cleaning apparatus that has the ability to rotate the wafer to be cleaned, as well as rotate the cleaning probe during the cleaning process. Rotating the cleaning probe while the wafer is being cleaned is effective to increase the cleaning action of the apparatus while also minimizing damage to the wafer. Curved grooves, such as a spiral groove, can be etched into the cleaning probe to minimize forming harmful waves that could potentially cause damage to the wafer surface or to structures already made on the surface. Using a cleaning probe having a curved groove while also rotating the cleaning probe effectively cleans particles from a wafer while also limiting damage to the surface of the wafer.