摘要:
A method of producing a branched carbon nanotube (CNT) is disclosed. The branched CNT is used with an atomic force microscope having a cantilever and a tip and that is able to measure a surface of a substrate as well as an undercut feature of the substrate that protrudes from the surface. A catalytic material is deposited onto the tip of the microscope, and the catalytic material is subjected to chemical vapor deposition. This initiates growth of a primary branch of the branched carbon nanotube such that the primary branch extends from the tip. A secondary branch is then introduced to extend from the primary branch and produce the branched carbon nanotube. The primary branch interacts with the surface of the substrate and the secondary branch interacts with the undercut feature.
摘要:
The present invention relates to an organometal complex and a chemical vapor deposition (CVD) or atomic layer deposition (ALD) method for preparing a metal silicate thin layer using same. The inventive method can easily prepare the metal silicate thin layer having a desired composition which can be effectively used as a gate insulating layer for various semiconductor devices.
摘要:
A method for forming a chromium-rich layer on the surface of a nickel alloy workpiece containing chromium includes heating the workpiece to a stable temperature of about 1100null C., and then exposing the workpiece to a gaseous mixture containing water vapor and one or more non-oxidizing gases for a short period of time. The process conditions are compatible with high temperature annealing and can be performed simultaneously with, or in conjunction with, high temperature annealing.
摘要:
A treatment method for hydrophilicity for a heat exchanger which can maintain the deodorizing property and hydrohilicity even after a long-time use, and a heat exchanger thus treated for hydrophilicity by said method are provided. After a previous acidic washing treatment, a heat exchanger is subjected to a chemical transformation treatment to form a chemical conversion coating film using a chromium chromate treatment agent, chromium phosphate treatment agent, or treatment agent of zirconium series, followed by a treatment for hydrophilicity using a treatment agent for hydrophilicity, which contains silica particulates and polymer of vinyl alcohol series in aqueous medium in a weight ratio 30:70null70:30 and in tot al content of 1null25 weight percent, and in which said silica particulates are coated with said polymer of vinyl alcohol series, and dispersed as coated particles of the average particle diameter of 5null1000 nm in aqueous medium, to form the coating film so as to amount to 1null3 g/m2.
摘要翻译:提供即使长时间使用也能够保持除臭性和耐水性的热交换器的亲水性处理方法和通过所述方法进行亲水处理的热交换器。 在先前的酸性洗涤处理之后,对热交换器进行化学转化处理,以使用铬酸铬处理剂,磷酸铬处理剂或锆系处理剂形成化学转化膜,然后使用 在水性介质中含有二氧化硅微粒和乙烯醇系聚合物,重量比为30:70〜70:30,总含量为1〜25重量%,其中所述二氧化硅微粒被涂覆 与所述乙烯醇系聚合物混合,在水介质中分散为平均粒径为5〜1000nm的包覆颗粒,形成涂膜至1〜3g / m 2。
摘要:
A method and apparatus for depositing a low dielectric constant film by reaction of an organosilicon compound and an oxidizing gas at a constant RF power level from about 10W to about 200W or a pulsed RF power level from about 20W to about 500W. Dissociation of the oxidizing gas can be increased prior to mixing with the organosilicon compound, preferably within a separate microwave chamber, to assist in controlling the carbon content of the deposited film. The oxidized organosilane or organosiloxane film has good barrier properties for use as a liner or cap layer adjacent other dielectric layers. The oxidized organosilane or organosiloxane film may also be used as an etch stop and an intermetal dielectric layer for fabricating dual damascene structures. The oxidized organosilane or organosiloxane films also provide excellent adhesion between different dielectric layers. A preferred oxidized organosilane film is produced by reaction of methylsilane, CH3SiH3, or dimethylsilane, (CH3)2SiH2, and nitrous oxide, N2O, at a constant RF power level from about 10W to about 150W, or a pulsed RF power level from about 20W to about 250W during 10% to 30% of the duty cycle.
摘要:
The present invention provides a method and apparatus for achieving conformal step coverage on a substrate by PVD. A target provides a source of material to be sputtered by a plasma and then ionized. Ionization is facilitated by maintaining a sufficiently dense plasma using, for example, an inductive coil. The ionized material is then deposited on the substrate which is biased to a negative voltage. A signal provided to the target during processing includes a negative voltage portion and a zero-voltage portion. During the negative voltage portion, ions are attracted to the target to cause sputtering. During the zero-voltage portion, sputtering from the target is terminated while the bias on the substrate cause reverse sputtering therefrom. Accordingly, the negative voltage portion and the zero-voltage portion are alternated to cycle between a sputter step and a reverse sputter step. The film quality and uniformity can be controlled by adjusting the frequency of the signal, the chamber pressure, the power supplied to each of the support member and other process parameters.
摘要:
A method for forming a silicon carbide film on a semiconductor substrate by plasma CVD includes (a) introducing a raw material gas containing silicon, carbon, and hydrogen and an inert gas into a reaction chamber at a predetermined mixture ratio of the raw material gas to the inert gas; (b) applying radio-frequency power at the mixture ratio, thereby forming a curable silicon carbide film having a dielectric constant of about 4.0 or higher; and (c) continuously applying radio-frequency power at a mixture ratio which is reduced from that in step (b), thereby curing the silicon carbide film to give a dielectric constant lower than that of the curable silicon carbide film.
摘要:
Liquid compositions for the treatment of metal surfaces comprising: (A) a compound having formula (I): 1 (B) a fluorinated fluid, liquid at room temperature, having boiling point in the range 50null C.-250null C.
摘要:
An improved method for applying organic antireflective coatings to substrate surfaces and the resulting precursor structures are provided. Broadly, the methods comprise chemical vapor depositing (CVD) an antireflective compound on the substrate surface. In one embodiment, the compound is highly strained (e.g., having a strain energy of at least about 10 kcal/mol) and comprises two cyclic moieties joined to one another via a linkage group. The most preferred monomers are null2.2null(1,4)-naphthalenophane and null2.2null(9,10)-anthracenophane. The CVD processes comprise heating the antireflective compound so as to vaporize it, and then pyrolizing the vaporized compound to form stable diradicals which are subsequently polymerized on a substrate surface in a deposition chamber. The inventive methods are useful for providing highly conformal antireflective coatings on large substrate surfaces having super submicron (0.25 nullm or smaller) features.
摘要:
A new method and apparatus for avoiding contamination of films deposited in layered depositions, such as Atomic Layer Deposition (ALD) and other sequential chemical vapor deposition (CVD) processes, is taught, wherein CVD-deposited contamination of ALD films is prevented by use of a pre-reaction chamber that effectively causes otherwise-contaminating gaseous constituents to deposit on wall elements of gas-delivery apparatus prior to entering the ALD chamber.