摘要:
Provided are a magnetic memory device and a method of forming the same. The magnetic memory device includes a magnetic tunnel junction pattern located on a substrate and including magnetic patterns and a tunnel barrier pattern located between the magnetic patterns, and a first crystallinity conserving pattern located on the magnetic tunnel junction pattern and having a higher crystallization temperature than the magnetic patterns. The first crystallinity conserving pattern is amorphous.
摘要:
The present invention relates to a method for producing a furan-based compound using an ion exchange resin in the presence of an organic solvent. In the method for producing a furan-based compound according to the present invention, a furan-based compound is made from an aldose-type hexose compound in the presence of an organic solvent by using an anion exchange resin and a cation exchange resin. Thus, the aldose-type hexose compound obtained from biomass by simultaneously or consecutively using the anion/cation exchange resins as catalysts can be made into 5-hydroxymethyl-2-furfural (HMF) or alkyl ether derivatives thereof such as 5-alkoxymethyl-2-furfural (AMF) without using an expensive reagent. Also, since the selection of an organic solvent is not limitative and a heterogeneous catalyst can be used, separation and purification is easy and chemically stable AMF can be directly obtained. Further, the conversion efficiency of the aldose-type hexose compound is excellent, and the hexose compound can be used at a high concentration.
摘要:
Disclosed is a method of preparing a petroleum-alternative bio fuel material such as 5-hydroxymethyl-2-furfural (HMF), 5-alkoxymethyl-2-furfural, levulinic acid alkil ester, etc. through a single process without saccharification, using a catalyst conversion reaction, from galactan that can be massively supplied at low costs and extracted from macroalgae of marine reusable resources.Thus, the macroalgae of the marine biomass resources is used so that a carbon source can be more easily extracted than that of a lignocellulosic biomass resource without a problem of having an effect on grain price like a crop-based biomass.
摘要:
Methods of fabricating phase change memory elements include forming an insulating layer on a semiconductor substrate, forming a through hole penetrating the insulating layer, forming a lower electrode in the through hole and forming a recess having a sidewall comprising a portion of the insulating layer by selectively etching a surface of the lower electrode relative to the insulating layer. A phase change memory layer is formed on the lower electrode. The phase change memory layer has a portion confined by the recess and surrounded by the insulating layer. An upper electrode is formed on the phase change memory layer. Phase change memory elements are also provided.
摘要:
A semiconductor device having a dual gate is formed on a substrate having a dielectric layer. A first metallic conductive layer is formed on the dielectric layer to a first thickness, and annealed to have a reduced etching rate. A second metallic conductive layer is formed on the first metallic conductive layer to a second thickness that is greater than the first thickness. A portion of the second metallic conductive layer formed in a second area of the substrate is removed using an etching selectivity. A first gate structure having a first metallic gate including the first and the second metallic conductive layers is formed in a first area of the substrate. A second gate structure having a second metallic gate is formed in the second area. A gate dielectric layer is not exposed to an etching chemical due to the first metallic conductive layer, so its dielectric characteristics are not degraded.
摘要:
An apparatus for drying a substrate using the Marangoni effect is disclosed. The apparatus includes a rotatable supporting portion on which a substrate is placed. A first nozzle for supplying de-ionized water and a second nozzle for supplying isopropyl alcohol vapor are provided on the supporting portion. When the isopropyl alcohol vapor is supplied to the center of the substrate at the initial stage, the amount of alcohol that reaches the substrate is controlled by a controlling portion such that the amount of the second liquid gradually increases.
摘要:
Example embodiments of the present invention relates to methods of fabricating a semiconductor device. Other example embodiments of the present invention relate to methods of fabricating a semiconductor device using a metal nitride layer as a gate electrode. The methods may include providing a semiconductor substrate having a first region and a second region. A gate insulating layer, a metal nitride layer and/or an amorphous carbon layer may be sequentially formed on the substrate. The amorphous carbon layer may be selectively etched, forming an amorphous carbon mask covering the first region. The metal nitride layer, exposed by the amorphous carbon mask, may be etched, forming a preliminary metal nitride pattern. The amorphous carbon mask may be removed.
摘要:
A cleaning method for removing foreign bodies during the fabrication of semiconductor devices including treating a substrate with a cleaning solution including an oxidizer to form a chemical oxide layer and then removing the chemical oxide layer, thereby removing foreign bodies from a surface of the semiconductor substrate. Accordingly, the foreign bodies can be substantially removed from the surface of the substrate without corroding a metal.
摘要:
According to an example embodiment of the present invention, the microelectronic cleaning agent may include a fluoride component, an acid component, a chelating agent, a surfactant and water. Example embodiments of the present invention provide a microelectronic cleaning agent which can selectively remove, for example, a high-k dielectric layer. The microelectronic cleaning agent includes from about 0.001 weight % to about 10 weight % of a fluoride component, from about 0.001 weight % to about 30 weight % of an acid component, from about 0.001 weight % to about 20 weight % of a chelating agent, from about 0.001 weight % to about 10 weight % of a surfactant, and water (H2O). The water may comprise the remainder of the cleaning agent. According to another embodiment of the present invention, a method of fabricating a semiconductor device using the microelectronic cleaning agent is also provided.
摘要翻译:根据本发明的示例性实施方案,微电子清洗剂可以包括氟化物组分,酸组分,螯合剂,表面活性剂和水。 本发明的示例性实施方案提供了可以选择性地除去例如高k电介质层的微电子清洁剂。 微电子清洁剂包括约0.001重量%至约10重量%的氟化物组分,约0.001重量%至约30重量%的酸组分,约0.001重量%至约20重量%的螯合剂, 约0.001重量%至约10重量%的表面活性剂和水(H 2 O 2)。 水可以包括剩余的清洁剂。 根据本发明的另一实施例,还提供了使用微电子清洁剂制造半导体器件的方法。
摘要:
The present invention provides methods of processing a substrate by contacting the substrate with an inorganic solution including an organic additive, rinsing the substrate with an organic alcohol, and rinsing the substrate with deionized water. Related substrates and devices are also disclosed.