162results about How to "Increase nucleation density" patented technology

A two-step semiconductor electroplating process deposits copper onto wafers coated with a semi-noble metal in manner that is uniform across the wafer and free of voids after a post electrofill anneal. A seed-layer plating bath nucleates copper uniformly and conformably at a high density in a very thin film using a unique pulsed waveform. The wafer is then annealed before a second bath fills the features. The seed-layer anneal improves adhesion and stability of the semi-noble to copper interface, and the resulting copper interconnect stays void-free after a post electrofill anneal.

A two-step semiconductor electroplating process deposits copper onto wafers coated with a semi-noble metal in manner that is uniform across the wafer and free of voids. A plating bath nucleates copper uniformly and conformably at a high density in a very thin film. A second bath fills the features. A unique pulsed waveform enhances the nucleation density and reduces resistivity of the very thin film deposited in the nucleation operation. The process produces a thinner and conformal copper seed film than traditional PVD copper seed processes.

The invention belongs to the technical field of preparation of aluminum alloy sections, and relates to a wide-range thin-wall series-6 aluminum alloy section for a high speed train and a preparation method of the wide-range thin-wall series-6 aluminum alloy section. Aluminum alloy comprises the following elements in percentages by weight: 0.50-0.65% of Si, less than or equal to 0.25% of Fe, less than or equal to 0.10% of Cu, 0.03-0.15% of Mn, 0.45-0.55% of Mg, less than or equal to 0.05% of Cr, less than or equal to 0.05% of Zn, less than or equal to 0.10% of Ti, less than or equal to 0.05% ofa single impurity, less than or equal to 0.15% of total impurities and the balance of Al. Deformation resistance and friction resistance in an extruding process are reduced by reasonably controllingthe temperature relationship of an ingot casting, an extrusion barrel and a die, the extruding speed is increased to be 8-13 m/min, the quenching temperature of the product is ensured, thus, any coarse grain rings are not generated when a thin-walled apron board is extruded at high speed, after being subjected to on-line quenching, the product is directly subjected to artificial ageing at the temperature of 175+/- 5 DEG C for 4-8 hours, the mechanical property of the product can meet requirements in TB/T.3260.4-2011 TO 1.2 mm thin-walled sections, the actual tensile strength reaches 250-270 MPa, the yield strength reaches 210-230 MPa, the specific elongation is 8-10%, and the grade of the grain size of an aluminum section microscopic structure reaches and even exceeds 4.

The invention provides a method for preparing perfluoropolyether through carrying out ring opening polymerization on tetrafluoro oxetane and the perfluoropolyether thereby. According to the method, the ring opening polymerization of the tetrafluoro oxetane is initiated by using fluoride salt as an initiator and a perfluoropolyether chemical compound F-(OCF2CF2CF2)n-CF2CF3 is collected through controlling the vacuum degree and the distillation temperature, where the n=2-30. The invention provides a method for applying the perfluoropolyether material to a fingerprint-proof membrane for touch screens at the same time. According the method, a buffer layer is formed on a glass substrate after being subjected to O2 glow discharge bombardment and a perfluoropolyether membrane is formed on the upper surface of the buffer layer, wherein the buffer layer is a PECVD (Plasma Enhanced Chemical Vapor Deposition)-deposited SiO2 film. A good adhesive force is provided between the SiO2 buffer layer and the glass substrate through depositing the SiO2 buffer layer by utilizing PECVD, so that the adhesive force between the perfluoropolyether fingerprint-proof membrane and the glass substrate is increased to a certain extent.

The present invention discloses a nano multicrystal phase glass-ceramic. Its composition includes (by wt%) 70% of silicon dioxide, 3.1%-4% of lithium oxide, 15% of aluminium oxide, 0.7%-1.2% of magnesium oxide, 0.8%-1.4% of zinc oxide, 0.4%-0.7% of calcium oxide, 0.2% of boron oxide, 1.8%-3.2% of titanium oxide, 1.5%-2.3% of zirconium oxide, 1.8%-2.1% of mixture of potassium oxide and sodium oxide, 0.1%-2.0% of lithium fluoride and/or phosphorus pentoxide and 0.8%-0.9% of mixture of arsenium oxide and antimony oxide. Its production method includes the following steps: grinding the above-mentioned components, uniformly mixing them to obtain mixed material, melting at 1350-1650deg.C, forming, annealing, nucleating for 1-4hr at 500-800deg.C, then heating to 700-1000deg.C and making crystallization treatment for 1-12hr so as to obtain the invented product.

The invention discloses a GaAs substrate-based gallium oxide thin film and a growing method thereof, and mainly solves the problems of poor surface appearance and small grain size of an existing gallium oxide thin film. The gallium oxide thin film comprises a GaAs substrate (1) and a gallium oxide epitaxial layer (3), and is characterized in that a gallium oxide buffer layer (2) of 6 to 12 nm is arranged between the GaAs substrate (1) and the gallium oxide epitaxial layer (3), and the crystal quality of the gallium oxide buffer layer is improved by utilizing thermal annealing. The surface roughness of a Ga2O3 thin film is reduced, the surface appearance of the Ga2O3 thin film is improved, and the Ga2O3 grain size is increased; the GaAs substrate-based gallium oxide thin film and the growing method can be used for making semiconductor power devices.

A method to electrodeposit or electroless deposit material onto substrates from ionic liquids in vacuum or in a protective atmosphere after exposing the ionic liquid to vacuum and the resulting material. According to the invention, dense layers, free of unwanted components, can be produced in vacuum or in a protective atmosphere after exposing the ionic liquid to vacuum.

The invention discloses a sapphire substrate-based multilayer gallium oxide thin film and the growing method thereof, and mainly solves the problem of poor appearance and small crystal grain size of conventional gallium oxide thin films. The gallium oxide thin film comprises a sapphire substrate and gallium oxide epitaxial layers. and is characterized in that a plurality of epitaxial layers are provided, a 8-12nm of gallium oxide buffer layer is arranged under each gallium oxide epitaxial layer from top to bottom, and a composite structure of buffer layers and epitaxial layers alternatively formed is formed on the substrate. The surface roughness of a Ga2O3 is reduced, the surface appearance of the Ga2O3 is improved, and the crystal grain size of the Ga2O3 is increased. The sapphire substrate-based multilayer gallium oxide thin film can be used to manufacture a semiconductor power device.

The invention discloses a coptis extract silicon slice texturing agent. The coptis extract silicon slice texturing agent is characterized by being prepared from, by weight, 5-10 parts of coptis roots, 1.5-2.5 parts of sodium hydroxide, 3-5 parts of sodium tripolyphosphate, 0.3-0.5 part of lauryl sodium sulfate, 0.3-0.5 part of sodium lauroamphoacetate, 5-10 parts of texturing modifiers, 0.3-0.5 part of coconut oil, 0.5-1 part of sodium caseinate, 0.3-0.5 part of maltodextrin and 100-150 parts of water. By means of the silicon slice texturing agent, the texturing efficiency can be improved, the stability of the texturing technology can be improved, dosage of chemicals can be reduced, the silicon slice texturing agent is free of toxicity, harmless, green and environmentally friendly, the production cost is reduced, the transfer efficiency of a battery slice is effectively improved, good antibacterial and cleaning properties are achieved, and the product quality is stable.

Compositions having improved crystallization properties and physical properties including a continuous phase of a first biodegradable polyhydroxyalkanoate comprising a copolymer, or a blend thereof, of at least two randomly repeating monomer units and having a melting point Tm1, and a second crystallizable biodegradable polyhydroxyalkanoate homopolymer or copolymer, which comprises at least one randomly repeating monomer unit and has a melting point Tm2, where Tm2 is at least about 20□C. greater than Tm1. The compositions are formed by solution or melt blending of the components and may be formed into shaped articles.

The invention provides a preparation method of a high-temperature ultra-low sodium alumina powder material. Firstly, industrial aluminum hydroxide is subjected to a drying pretreatment; secondly, an appropriate amount of mineralizer and a seed crystal are added to the pretreated aluminum hydroxide for high-temperature roasting; thirdly, the high-temperature roasting product is subjected to washingwith dilute acid; finally, the washed alumina powder is ball-milled to a certain particle size, and the high-temperature ultra-low sodium alumina powder material is obtained. By adopting the method,the sodium oxide content of industrial alumina can be can effectively reduced, and the thermal shock resistance, electrical insulation, hardness and strength of the alumina powder material can be remarkably enhanced.

This invention relates to the heater and electrode structure of diamond film growth device. This invention mainly includes a fixing electrode, a mobile electrode and corresponding heater, the character as follows: the fixing electrode is arranged with a group of electrode poles in equal space; and the mobile electrode is also arranged with a group of electrode poles, and the space is equal to the electrode pole space of the fixing electrode, the electrode pole is half space away from the electrode pole on the fixing electrode; the heater is a flat-shape heater, which is wrapped around the electrode pole of the fixing electrode and mobile electrode to form heater array. Comparing to the circular silk, the flat-shape structure increases the contact area and time of the reaction gas and heater, and improves the reaction gas decomposing rate, and save electric energy to decrease the growth cost of the diamond film.

The invention discloses a high-rigidity high-transparency polypropylene composite material, and belongs to the technical field of high polymer alloy materials. The high-rigidity high-transparency polypropylene composite material is compounded by 2-4wt% of nanoscale barium sulfate master batch, 0.1-0.3wt% p-tertiary butyl hydroxyl aluminum benzoate and 0.1-0.3wt% sorbitol acetal as a nucleating agent of polypropylene. According to the high-rigidity high-transparency polypropylene composite material, the nanoscale barium sulfate master batch is added to achieve a certain compatible effect on two nucleating agents, so that the two nucleating agents are prevented from resisting against each other; and meanwhile, the effects of nucleating heterogeneously, promoting the polypropylene to quicken crystallization and refining spherocrystal effects are achieved, so that the rigidity and the transparency of a PP (polypropylene) product are further improved.