47results about How to "Simple passivation process" patented technology

Integrated circuits, the key components in thousands of electronic and computer products, are generally built layer by layer on a silicon substrate. One common technique for forming layers is called chemical-vapor deposition (CVD.) Conventional CVD systems not only form layers that have non-uniform thickness, but also have large chambers that make the CVD process wasteful and slow. Accordingly, the inventor devised new CVD systems, methods, and apparatuses. One exemplary CVD system includes an outer chamber, a substrate holder, and a unique gas-distribution fixture. The fixture includes a gas-distribution surface having holes for dispensing a gas and a gas-confinement member that engages or cooperates with the substrate holder to form an inner chamber within the outer chamber. The inner chamber has a smaller volume than the outer chamber, which not only facilitates depositions of more uniform thickness, but also saves gas and speeds up the deposition process.

The invention relates to a composite film chromium-free passivant, which mainly comprises the following components of: a waterborne resin film-forming substance, an organic acid film-forming substance, an inorganic film-forming substance, a film-forming auxiliary agent, an additive, water and the like. The formula of the composite film chromium-free passivant is scientific and reasonable, does not comprise toxic and harmful substances such as chromium and the like, and meets the requirements of ROHS environmental protection laws and regulations which have been implemented by European Union since July 2006, so that the composite film chromium-free passivant is an environmentally-friendly chemical treatment agent. The composite film chromium-free passivant is suitable for hot galvanizing and electrogalvanizing post-processing technology, and the passivation process is simple and easy to operate. An organic and inorganic composite film is formed on the surface of a galvanized part after passivation by using the composite film chromium-free passivant. The composite film is colorless and transparent, has high corrosion resistance and can substitute for the traditional chromate to perform the passivation.

The invention discloses a chromium-free stainless steel passivating agent. The chromium-free stainless steel passivating agent comprises the following components in parts by weight: 10-15 parts of rare earth metal salt, 3-5 parts of organic acid, 8-10 parts of a silane coupling agent, 3-5 parts of a complexing agent, 3-5 parts of a film curing agent, 3-5 parts of an accelerant, 2-3 parts of water-soluble titanium oxide and the balance of deionized water. After adoption of a formula, a preparation process of the chromium-free stainless steel passivating agent is environment-friendly and pollution-free, and the prepared passivating agent is a novel environment-friendly product that does not contain substances forbidden in European Union ROSE instructions.

A p-type field effect transistor (PFET) and an n-type field effect transistor (NFET) are formed by patterning of a gate dielectric layer, a thin silicon layer, and a silicon-germanium alloy layer. After formation of the source / drain regions and gate spacers, silicon germanium alloy portions are removed from gate stacks. A dielectric layer is formed and patterned to cover an NFET gate electrode, while exposing a thin silicon portion for a PFET. Germanium is selectively deposited on semiconductor surfaces including the exposed silicon portion. The dielectric layer is removed and a metal layer is deposited and reacted with underlying semiconductor material to form a metal silicide for a gate electrode of the NFET, while forming a metal silicide-germanide alloy for a gate electrode of the PFET.

The invention provides a rare-earth passivation method for improving the corrosion resistance of a chromium carbide coating on a stainless steel surface, comprising the following steps of: carrying out deoiling and degreasing treatment on stainless steel plated with chromium carbide, and carrying out rare-earth passivation treatment. The rare-earth passivation method is characterized in that the rare-earth passivation treatment is that the stainless steel plated with the chromium carbide, which is subjected to the deoiling and degreasing treatment, is placed into a rare-earth passivation solution of KMnO4+Ce(NO3)3.6H2+Mg(NO3)2; then steps of washing and drying are carried out to obtain the passivated stainless steel plated with the chromium carbide. The rare-earth passivation method disclosed by the invention has the beneficial effects that simple passivation process, low machining cost, no pollution to the passivation solution and no influences on mechanical properties of the stainless steel plated with the chromium carbide. Meanwhile, a passivation process can obviously improve the corrosion resistance of the stainless steel plated with the chromium carbide.

The invention relates to a chromium-free passivation process and a passivation solution for aluminum tubes used in evaporators of refrigerators and freezers. The invention belongs to the technical field of surface treatment of aluminum materials and aims to improve the corrosion resistance of aluminum tubes used in evaporators of refrigerators and freezers. The continuously extruded aluminum tube is cooled, quickly passivated in a passivation solution at 20°C to 90°C, and then air-dried and solidified to form a passivation film on the surface of the aluminum tube. The passivation solution contains a passivation agent The mass concentration of alkyl phosphate is 1-15%, the mass concentration of silane coupling agent is 0.1-0.5%, the mass concentration of sodium silicate is 0.01-0.15%, and the rest is water. The passivated aluminum tube is dried with wind at 20-60°C and then packaged on a turntable. The process flow is simple, the cost is low, the speed is fast, the corrosion resistance of the passivated aluminum tube is greatly improved, and the agent and the passivation process are safe and environment-friendly.

Photovoltaic cells are fabricated in which the compositions of the light-absorbing layer and the electron-accepting layer are selected such that at least one side of the junction between these two layers is substantially depleted of charge carriers, i.e., both free electrons and free holes, in the absence of solar illumination. In further aspects of the invention, the light-absorbing layer is comprised of dual-shell passivated quantum dots, each having a quantum dot core with surface anions, an inner shell containing cations to passivate the core surface anions, and an outer shell to passivate the inner shell anions and anions on the core surface.

The invention discloses a chromium-free passivation method of an aluminum pipe for an evaporator of a refrigerator or a freezer and a passivation solution thereof, belonging to the technical field of surface treatment of aluminum materials. The invention aims to improve the corrosion resistance of the aluminum pipe for the evaporator and the like of the refrigerator or the freezer. A passivation process is carried out on a CANFORM continuous extrusion aluminum pipe production line in an on-line way, the aluminum pipe formed by CANFORM continuous extrusion passes through a passivation groove after being water-cooled, and the passivation solution which has the components of passivator, assistant and solvent is filled into the groove, wherein vinyltris(beta-methoxyethoxy)silane the mass concentration of which is 1-15% is used as the passivator I, and dodecyl phosphate the mass concentration of which is 0.2-0.5% is used as the passivator II; benzotriazole or sodium silicate the concentration of which is 0.01-0.3% is used as the assistant; the mixture of water and 95% ethanol, the concentration of which is 3-8%, is used as the solvent; the passivation pH is 1.5-3.5, the passivation temperature is 35-50 DEG C, and the passivation time is 1-15 seconds; and the passivated aluminum pipe is packed with a rotating disk after being aired at 40-100 DEG C. The invention has the advantages of simple technical processes, low cost, high speed, on-line passivation, great improvement of corrosion resistance of the passivated aluminum pipe, and safety and environmental protection of medicaments and passivation processes.

The invention discloses a chromium-free passivation liquid applied to the surface of a zinc-coated layer, belonging to the technical field of new materials for passivating the surfaces of zinc-coated materials (including zinc-coated steel plates and other zinc-coated parts0. The chromium-free passivation liquid does not contain metal element zirconium and is a chromium-free environmental-friendly passivation liquid which can substitute for hexavalent chromium or trivalent chromium. Each liter of chromium-free passivation liquid comprises 20-100 g of metal element salt, 5-10 g of aqueous silane, 2-10 g of complexing agent, 10-120 g of nano filling material, 1-5 g of oxidizing agent, 5-50 g of film forming aid and the balance of water. In the chromium-free passivation liquid provided by the invention, organic silicon modified acrylate is used as the film forming aid, cerium salt or lanthanum salt and molybdate are used as inorganic components, and the nano filling material and other aids are used as auxiliaries to form the organic and inorganic compound passivation liquid. The passivation effect of the passivation liquid even exceeds that of the hexavalent chromium or trivalent chromium passivation liquid and can totally substitute for the hexavalent chromium or trivalent chromium passivation liquid.

The invention discloses environment-friendly blue-white passivation liquid and a preparation method thereof, and belongs to the technical field of metal material surface treatment. The passivation liquid comprises the components of 4-8 g / L of sodium silicate, 23-27 g / L of sodium nitrate, 1-5 g / L of nickel sulfate, 3-7 mL / L of titanium trichloride, 8-12 mL / L of hydrogen peroxide, 3-7 g / L of succinic acid, 0.35-0.45 g / L of benzylidene acetone, 1-3 g / L of thiourea and the balance deionized water, and the pH value is 0.5-1.5. The preparation method of the passivation liquid comprises the steps that the sodium silicate is dissolved in the deionized water; then the sodium nitrate, the nickel sulfate, the titanium trichloride, the hydrogen peroxide, the succinic acid, the benzylidene acetone andthe thiourea are sequentially added and evenly mixed; the deionized water is added to conduct constant volume to the required volume; and sulfuric acid is adopted to adjust the pH value to be 0.5-1.5,and then the silicate blue-white passivation liquid is obtained. A zinc coating passivation film treated through the passivation liquid is blue white, the color is bright, film forming is uniform, corrosion resistance is excellent, the passivation liquid does not contain trivalent chromium, hexavalent chromium and other harmful substances, environmental protection is achieved, pollution is avoided, the passivation process is simple, the passivation efficiency is high, and the film layer corrosion resistance is good.

The invention aims at providing an environment friendly stainless steel passivation solution. The environment friendly stainless steel passivation solution comprises the following component of, by weight, 10-25 parts of citric acid, 5-15 parts of salicylic acid, 50-80 parts of hydrogen peroxide, 20-30 parts of sodium citrate, 5-8 parts of nanometer titania sol, 5-15 parts of stabilizing agents, 5-10 parts of inhibiting agents, 5-12 parts of sodium molybdate and 50-100 parts of deionized water. The invention also discloses a preparation method for the environment friendly stainless steel passivation solution. According to the environment friendly stainless steel passivation solution, the passivation effect is good, the binding force of a passivation film and a plating layer is high, and the coating property of the passivation film is good; the environment friendly stainless steel passivation solution has certain ultraviolet-proof property and antibacterial property, is free of toxic substances, and is harmless to the environment and human bodies.

The invention belongs to the surface technical field of metallurgical metal materials and discloses a chrome-free passivating liquid and a passivating method for silver and a silver coating. Molybdateor tungstate, a removing agent and a complexing agent are included. The molybdate or tungstate can be selected from one or more of alkali metal molybdate or alkali metal tungstate; the removing agentcan be selected from chloride; and the complexing agent can be selected from hypochlorite. According to a passivating manner, the silver and the silver coating are soaked in a prepared solution, thedipping time is 1-3 min, and the dipping temperature does not exceed 60 DEG C; and the silver and the silver coating are taken out, washed and dried, and a silver and silver coating passivating film is obtained. The passivating solution does not contain hexavalent or trivalent chromium harmful to human bodies and the envrionment, the passivating process is simple, cost is low, controllability is good, a film layer grows fast and is good in corrosion resistance, and industrialized popularization can be performed in the industrial field.

The invention provides rare earth passivation liquid based on nanometer attapulgite and preparation and passivation processes thereof. The rare earth passivation liquid based on the nanometer attapulgite comprises rare earth coated natural bentonite, the nanometer attapulgite, a silane coupling agent, hydrogen peroxide, sulfuric acid, sodium nitrate and copper sulfate. The preparation method comprises the following steps: the silane coupling agent is added in ethanol water solution for uniform stirring, the nanometer attapulgite is added for uniform stirring to form nanometer attapulgite solution; the natural bentonite and rare earth elements are added in distilled water for magnetic stirring dissolution at room temperature to form rare earth coated bentonite solution; and after the two types of solution are mixed, aluminum silicate and auxiliaries are added for uniform mixing to form the rare earth passivation liquid based on the nanometer attapulgite. The silane coupling agent is used for modifying the rare earth elements, the nanometer attapulgite and the natural bentonite, and is combined with silicate; the prepared passivation liquid is stable and uniform; the passivation process is simple; the passivation effect is good; the use level of rare earth is reduced; and the cost is reduced.

The invention discloses an environment-friendly composite colorful passivating solution and a preparation method thereof and belongs to the technical field of surface treatment of metal materials. Thepassivating solution comprises the components of 17-22 g / L of sodium silicate, 4-8 g / L of sodium molybdate, 6-10 g / L of sodium nitrate, 3-7 mL / L of hydrogen peroxide, 1-3 g / L of potassium fluoride, 2-6 mL / L of nitrilotrimethylene triphosphonic acid, 2-4 g / L of sodium gluconate, 2-4 mL / L of tartaric acid and the balance water, wherein the pH value of the passivating solution is 2.0-2.5. The preparation method of the passivating solution comprises the steps that the sodium silicate, the sodium molybdate, the sodium nitrate, the potassium fluoride, the nitrilotrimethylene triphosphonic acid, thesodium gluconate, the tartaric acid and the hydrogen peroxide are sequentially added into deionized water to be evenly mixed; the water with the constant volume is added to the needed volume; and sulfuric acid is used for adjusting the pH value to be 2.0-2.5, and thus environment-friendly composite colorful passivating solution is obtained. A galvanized layer passivated film treated by the passivating solution is colorful, bright in color, even in film forming and excellent in corrosion resistant performance; the passivating solution does not contain trivalent chromium, hexavalent chromium and other harmful substances and is environmentally friendly, free of pollution, simple in passivating process and high in passivating efficiency, and the corrosion resistance of a film layer is good.