摘要:
Disclosed are electroplating compositions and methods for filling recessed microstructures of a microelectronic workpiece (101), such as a semiconductor wafer, with metallization. The electroplating compositions may comprise a mixture of copper and sulfuric acid wherein the ratio of copper concentration to sulfuric acid concentration is equal to from about 0.3 to about 0.8 g/L (grams per liter of solution). The disclosed electroplating compositions may also comprise a mixture of copper and sulfuric acid wherein the copper concentration is near its solubility limit when the sulfuric acid concentration is from about 65 to about 150 g/L. Such electroplating compositions may also include conventional additives, such as accelerators, suppressors, halides and/or levelers. Methods for electrochemically depositing conductive materials in features, such as trenches and/or contact holes formed on semiconductor workpieces are disclosed, including methods suited for use in multiple anode reactors using the disclosed electroplating solutions.
摘要:
The invention relates to a method for producing shaped half-finished products and articles made of high-strength aluminium alloys in the form of ribs, fittings, beams etc. used for the aircraft and space engineering and for vehicle building. The inventive method consists in the following operations: ingot casting, homogenisation and forging thereof; compressing a forged billet, hardening and cold shaping thereof in two stages: 1) stretch flattering with a residual deformation ranging from 1 % to 5 %; 2) three-dimensional bending of the billet simultaneously with local plastic deformation by compression ranging from 1 % to 20 % in coupling zones of elements of the billet which are arranged at an angle ranging from 45 DEG to 135 DEG in relation to each other. Ageing is carried out in two steps: in the first step, the billet is heated to a temperature ranging between 90 DEG C and 120 DEG C during 5-24 hours, in the second step the billet is heated to a temperature ranging between 160 DEG C and 190 DEG C during 5-20 hours. The inventive method makes it possible to produce long half-finished products having an irregular shape and made of deformable aluminium alloys having high strength characteristics and crack resistance and a low level of residual deformations thereby ensuring the production of articles devoid of shrinkage and buckling during mechanical operations.
摘要:
The invention relates to a method of manufacturing an Al or alloy workpiece, comprising the steps of (a) providing an AlAl alloy workpiece, (b) pre-treating of the outersurface of the Al or Al alloy workpiece, and (c) plating a metal layer comprising nickel onto said outersurface of the pre-treated Al or Al alloy workpiece, and wherein during step (c) said metal layer comprising nickel is deposited by electroplating both nickel and bismuth using an aqueous bath comprising a nickel-ion concentration in a range of 10 to 100 g/l and a bismuthion concentration in the range of 0.01 to 10 g/l. The invention further relates to an aqueous plating bath for use in the method of this invention.
摘要:
The invention relates to a brazing sheet product having a core sheet (1) made of an aluminium alloy, having one or both of the surfaces of said core sheet clad with an aluminium clad layer (2), and a layer (3) comprising nickel on the outersurface of one or both said aluminium clad layer or layers (2), characterised in that there is a layer (4) comprising zinc or tin as a bonding layer between said outersurface of said aluminium clad layer or layers (2) and said layer (3) comprising nickel and wherein the aluminium clad alloy layer comprising, in weight percent: Si 2 to 18; Mg up to 8.0; Zn up to 5.0; Cu up to 5.0; Mn up to 0.30; In up to 0.30; Fe up to 0.80; Sr up to 0.20; at least one element selected from the group consisting of: Bi 0.01 to 1.0; Pb 0.01 to 1.0; Li 0.01 to 1.0; Sb 0.01 to 1.0; Mg 0.2 to 2.0 impurities each up to 0.05, total up to 0.20 balance aluminium.
摘要:
Electrolytes containing water, at least one organic solvent, and at least one alkali metal phosphate salt can be used for anodizing valve metals prepared from metal powder having a surface area of least .35 m /g or 35,000 CV/g. The alkali metal phosphate salt should be relatively insoluble in the organic portion of the electrolyte, but highly soluble in a water solution of the organic solvent. The anodizing electrolytes have relatively high conductivity and are capable of being used at high anodizing currents. The anodic film produced by these electrolytes on valve metals is of substantially uniform thickness, has improved electrical parameters, and requires a shorter stabilization time at voltage.
摘要:
The invention relates to an anodic electrophoretic coating method. According to said method, a coating agent used in an anodic electrophoretic bath is compensated with an under-neutralised anodic refill material, said refill material consisting of A) a pigment-free aqueous binder component containing 40 to 70 wt. % solids and
摘要:
The invention relates to an apparatus and a method for producing hydrogen by means of at least one solar cell (1) which is spatially assigned to at least one electrolytic cell (2) encompassing an electrolyte and is operated with the aid of highly focused sunlight (3). According to the invention, the solar cell (1) is configured so as to be cooled by the electrolyte penetrating the electrolytic cell (2) such that the solar cell can be operated more economically.
摘要:
A method for replicating a nanopattern is disclosed. This method includes identifying a substrate (110); coating a surface of the substrate with a liquid layer (120); positioning a mold having a plurality of recesses defining a negative of the nanopattern in sufficient proximity with the coated liquid layer to cause the liquid layer to self-fill at least a portion of the plurality of recesses of the mold (130); and, chemically transforming the liquid layer (140) to enable the transformed film to substantially retain the nanopattern and separating the mold (150).
摘要:
Electrolytes containing water, at least one organic solvent, and at least one alkali metal phosphate salt can be used for anodizing valve metals prepared from metal powder having a surface area of least .35 m /g or 35,000 CV/g. The alkali metal phosphate salt should be relatively insoluble in the organic portion of the electrolyte, but highly soluble in a water solution of the organic solvent. The anodizing electrolytes have relatively high conductivity and are capable of being used at high anodizing currents. The anodic film produced by these electrolytes on valve metals is of substantially uniform thickness, has improved electrical parameters, and requires a shorter stabilization time at voltage.
摘要:
Methods and apparatus are described for patterned deposition of nanostructure-containing materials by self-assembly and related articles. According to an exemplary embodiment self-assembly method for depositing nanostructure-containing materials includes forming a nanostructure-containing material. The nanostructure-containing material is chemically functionalized and dispersed in a liquid medium to form a suspension. At least a portion of a substrate having a surface that can attract the functionalized nanostructure-containing material is brought into contact with the suspension. The substrate is separated from the suspension. The nanostructure-containing material adheres to the portion of the substrate when separated from the suspension. According to another exemplary embodiment, hydrophilic and hydrophobic regions are formed on the surface of the substrate before bringing the substrate into contact with the suspension. The functionalized nanostructure-containing material is hydrophilic and adheres to the hydrophilic region of the substrate when separated from the suspension.