96 results about "Micro roughness" patented technology

Water-repellant, self-cleaning coatings and methods of making and using thereof are described herein. In one embodiment, a hydrophobic or super hydrophobic coating is applied to the surface of a golf ball to make the golf-ball water-repellant and self-cleaning. Suitable coating materials include silicone compounds, silicone compounds, nanoparticles, silanes, fluorocarbon polymers, perfluoroalkyl ethyl methacrylate (PPFEMA) coated polycaprolactone, hydrocarbons, polymer mats made of polystyrene and poly[tetrafluoroethylene-co-(vinylidene fluoride)-co-propylene] (PTVFP); polyethylene glycol with glucose and sucrose in conjunction with a hydrophobic substance; combinations of nanoparticles with polyethylene or polypropylene; high density polyethylene, technical waxes; films of rough particles of metal oxides, polymer binder layers containing a plurality of porous protrusions, and combinations thereof. Suitable coating techniques include, but are not limited to, spraying, dipping, painting, brushing, or wiping (such as applying the coating from a towel or sponge). The coating material or the outer layer of the golf ball may be modified to create nano- or micro roughness or patterns on the surface of the golf ball, which can induce the lotus effect. This roughness or pattern can be created using a variety of techniques known in the art including, but not limited to, etching, top/down methodologies, bottom/up methodologies, or combinations thereof.

Disclosed is a slurry composition for final polishing of silicon wafers to achieve mirror surfaces of the wafers. The slurry composition can include deionized water, abrasive particles, a pH-adjusting agent, a water-soluble thickener, an acetylene surfactant, and a heterocyclic amine. The particle diameter of the abrasive particles and the contents of the components can be selected so that the slurry composition can markedly reduce the number of LLS defects having a size larger than about 50 nm formed on the surface of wafers, and greatly reduce the haze and microroughness of wafer surfaces.

[Problem] A composite of a metal part and a resin composition part that is improved so that the metal and resin are integrally joined to have strong bonding properties, and a method for manufacturing the composite.

[Solution] A magnesium alloy part is inserted into a mold, a resin composition is injected and joined to the part, and a composite is obtained. A part having, formed thereon, a surface layer of a metal oxide, a metal carbonate, or a metal phosphate in use of a usual conversion treatment or a modification method thereof can be used for the magnesium alloy plate 1. The surface that has a larger amount of crystal-like objects of a nanolevel on the surface layer composed of the metal oxide, metal carbonate, or metal phosphate has a higher level of hardness, microscopic roughness, and good injection joining force, and these parameters can be controlled by a conversion treatment method. A resin composition 4, containing PBT or PPS as the main component, is used as the resin composition part.

The invention relates to a light emitting diode device having a light extracting rough structure. The device includes a leadframe, one or more light emitting diode chips provided on and electrically connected to the leadframe, and a lens configured to encapsulate the one or more light emitting diode chips, the lens having a surface including a micro-roughness structure. The micro-roughness structure of the lens has a roughness between 0.1 μm and 50 μm. The invention also relates to a method of manufacturing a light emitting diode device having a light extracting rough structure.

The present invention is directed to a micro-array surface that provides for either drag reduction or enhancement. In one aspect, an aerodynamic or hydrodynamic wall surface that is configured to modify a fluid boundary layer on the surface comprises at least one array of roughness elements disposed on and extending therefrom the surface. In one example, the interaction of the roughness elements with a turbulent boundary layer of the fluid reduces the skin friction drag coefficient of the surface over an identical smooth surface without the roughness elements.

The invention provides single-sided chemically mechanical polishing method and device of a silicon chip, belonging to the technical field of single-sided chemically mechanical polishing methods and apparatuses of the silicon chip. The method comprises the following steps of: carrying out primary polishing and/or fine polishing according to surface quality requirements of single-sided polishing of the silicon chip and then carrying out rinsing polishing on a silicon chip. The device mainly comprises a primary polishing table and/or a fine polishing table and a rinsing polishing table. The invention can effectively reduce or eliminate residues of a polishing solution on a silicon chip surface after the silicon chip is primarily polished or finely polished, can greatly improve the single-sided polishing quality of the silicon chip, has wide application and can particularly satisfy higher precision requirements of the silicon chip with a diameter of 300 mm and above on overall and partial flatness and micro-roughness, and the like; the method is reasonable, unique in principle and favorable in processibility; the device has simple structure, reasonable configuration and high and stable single-sided polishing quality and is beneficial to enhancing production efficiency, reducing costs and realizing automation in the production process.

The item in subject is a pasta machine for domestic use, in which the surfaces of the various parts of the housing are composed of a microporous layer of aluminum oxide and completed with sealing of the micropores for hydration thus obtaining a micro-roughness with nonstick properties enabling the working of moist pasta.

A method of fabricating an implant with improved surface properties and an implant fabricated using the same are provided. The method includes immersing a substrate that has titanium or titanium alloy in electrolytic solution including at least one of the group consisting of phosphate or fluoride ion and strontium ion, and forming an oxide film layer with a surface structure having a fine roughness of a micro scale by making at least one of phosphate or fluoride ion and strontium ion react to the titanium or the titanium alloy of the substrate on a surface of the immersed substrate using hydrothermal reaction associated with temperature, pressure and time conditions.

Affords methods of surface treating a substrate and of manufacturing Group III-V compound semiconductors, in which a substrate made of a Group III-V semiconductor compound is rendered stoichiometric, and microscopic roughness on the surface following epitaxial growth is reduced. The methods include preparing a substrate made of a Group III-V semiconductor compound (S10), and cleaning the substrate with a cleaning solution whose pH has been adjusted to an acidity of 2 to 6.3 inclusive, and to which an oxidizing agent has been added (S20).

The invention discloses a waterborne superhydrophobic coating for building exterior walls. The coating is characterized by being prepared according to the following method: mixing deionized water andinorganic micron-nano-sized particles, carrying out uniform mixing by stirring at a room temperature, then adding a building exterior wall coating emulsion and fluorine-containing acrylic resin, and carrying out uniform stirring so as to obtain the waterborne superhydrophobic coating for building exterior walls, wherein the building exterior wall coating emulsion is one or a mixture of two or moreselected from the group consisting of a silicone-acrylate emulsion, a styrene-acrylic emulsion, a pure acrylic emulsion or an organosilicon emulsion in an arbitrary proportion; and the inorganic micron-nano-sized particles are one or a combination of two or more selected from the group consisting of silicon oxide, calcium carbonate and titanium dioxide. The preparation process provided by the invention is simple and has simple and convenient operations; the building exterior wall coating emulsion is utilized to provide a base bonding force; the fluorine-containing acrylic resin is self-migrated to the surface to form low surface energy; the micron-nano-sized particles provide micro roughness; thus, the coating has excellent superhydrophobicity.

The application discloses a spray-free matte PC-ABS alloy material and a preparation method thereof. The spray-free matte PC-ABS alloy material is prepared from the following raw materials: PC, an epoxy compound, ABS, PMI, mica powder, an ultraviolet light absorber, a compatilizer, an antioxidant, a lubricant, calcium carbonate, carbon fibers, titanium oxide fibers, glass fibers, polyethylene glycol, EBS, MBS, HDPE, a flame retardant, PTT fibers and EVA; an epoxy functional group reacts with a terminal hydroxyl group of PC, so that the PC is branched or partially crosslinked, the relative molecular quality is improved, the concentration of the terminal group is reduced and the compatibility between the PC and ABS interface is also decreased before branching; macromolecular chain segments of the material begin to curl by adding mica powder for compounding, a free space is filled with inorganic mineral powder while the macromolecular chain segments curl, so that uneven convex micro-roughness of extrusion lines and extrusion particles of the material is realized; parts obtained by injection molding show low gloss characteristics, while inorganic minerals enable the material to have wear resistance.

The invention relates to a silicon wafer cleaning process. According to the invention, multiple cleaning steps are adopted in the silicon wafer cleaning process, and hydrofluoric acid and hydrogen peroxide which are chemical reagents are used in each step, wherein the volume ratio of HF to H2O2 to H2O is 1: 1: 20 - 1: 1: 300. The silicon wafer cleaning process has the advantages of effectively improving particle removing efficiency, reducing surface micro-roughness level and increasing the product percent of pass.

The invention relates to the preparation of a nano-coating micropore surface implant having a regeneration activity and an antibacterial property. The preparation is characterized in that the implant is a dental implant taking pure titanium or titanium alloy as a matrix and an artificial joint medicinal hard tissue implant material; and the surface of a matrix material is subjected to micro-roughness treatment, improved biomimetic liquid treatment and nano silver grain coating technology treatment to form a nano biomimetic coating structure having the regeneration activity and the antibacterial property, wherein the nano silver grain is a metallic silver elementary substance which is attached to the surface of the implant and has the antibacterial property and a tissue repairing function, and has the grain diameter of 6 to 50nm; and a nano coating crystal grain formed on the surface of the implant through treatment and induction is a bone-like hydroxyapatite material rich in calcium and phosphor. The micro-nano biomimetic coating implant has a bone-promoting regeneration activity and a high affinity; compared with an un-coating material, the coating implant is improved in the bonding force with bones by several times so as to effectively avoid the phenomena of loosening and shedding and to be a novel medicinal implant material having both the antibacterial property and the regeneration activity.

A substrate cleaning device is capable of removing more diverse contaminants from substrates than ultra-low temperature aerosol ejection, while avoiding technical problems inherent to wet cleaning, such as micro-roughness, watermarks, loss of substrate material and destruction of the device structure. A substrate cleaning device for cleaning wafers to which cleaning target objects have adhered includes a cluster spraying unit which sprays the wafer with one or more types of clusters formed of cleaning preparation molecules agglomerated together, a suction unit which sucks the cleaning target objects separated by spraying the clusters of the cleaning agent molecules; and a unit for moving the wafer and the cluster spraying unit relative to the one another along the surface of the wafer W to which the cleaning target objects have adhered.

A method for locally forming a smooth surface on frosted glass includes steps of: a) preparing a piece of frosted glass; b) locally coating the frosted glass with a sealant; and c) such forming the sealant that has a smooth surface. The smooth surface of the frosted glass allows a video camera to capture clear images therethrough so as to prevent blurred images caused by micro-roughness on a surface of the frosted glass.

The invention discloses a preparation method of semigloss art paper. Sulfate softwood pulp, bleached sulfate hardwood pulp, bleached chemical hot-grinding mechanical pulp, ground calcium carbonate andpositive starch are used for raw paper, the reasonable proportion and properties, such as formation and surface structure, of the raw paper are strictly controlled, and the basis is provided for production of high-quality semigloss art paper. According to the method, different raw material proportions are adopted for bottom coating, middle coating and face coating, three glue application technologies are reasonably controlled, the paper face keeps the reasonable microcosmic roughness, and the reasonable luster contrast is achieved. By further strictly controlling the production technology, through the scheme, the operation loss and cost of a paper machine are reduced, edge floating paper breaking does not occur to a papermaking net part of 300 gsm, after paper formation and press, the thickness is 275-295 microns, the folding endurance (time) MD is larger than and equal to 4, the roughness is smaller than or equal to 2.54, the lustrousness is 22-29%, the lustrousness after printing is66-76%, the lustrousness contrast is 41-49%, and light spots do not occur.

The invention discloses a preparation method of a nano-modified fluorine-containing textile finishing agent, comprising the following steps: preparing an organic fluorine and epoxy modified nano-SiO2aqueous dispersion and preparing a short-carbon-chain low-content organic fluorine modified acrylate copolymer emulsion, and then compounding the two components according to a certain ratio to obtainthe nano-modified fluorine-containing textile finishing agent. The preparation method has the following advantages: as the organic fluorine and epoxy modified nano-SiO2 aqueous dispersion simultaneously provides micro-roughness and low surface tension in the finishing agent and the short-carbon-chain low-content organic fluorine modified acrylate copolymer emulsion provides good adhesion to a substrate, the nano-modified fluorine-containing textile finishing agent maintains water and oil repellency required by textiles, the total amount of organic fluorine is reduced, the cost of raw materialsis lowered, fluorine resources are saved, and durability is improved.

Mist of titanium element-containing liquid particles is adhered to the surface of a glass substrate having a surface compressive stress of at most 10 MPa so as to coat the surface of the glass substrate with the liquid. Next, the liquid-coated surface is heated up to a maximum temperature of from 550 to 700° C. and then cooled under a specific condition, thereby making the resulting glass sheet have a surface compressive stress of from 20 to 250 MPa. The process gives a glass sheet coated with a titanium oxide thin film having a photocatalytic function. The resulting titanium oxide thin filmhad good adhesiveness andabrasion resistance. Since its surface has a micro-roughness, the glass sheet has neither interference color nor interference fringes and has good transparency.

The invention is relative to an electrode for gas evolution in electrolytic and electrometallurgical industrial applications, made of a metal substrate having a surface morphology characterized by a combination of micro-roughness and macro-roughness which favors high adherence of a superficial catalytic layer in order to prevent detachment of the same and passivation of the substrate even under critical operating conditions.

The invention provides an organic acid super roughening process for pretreatment of a printed circuit board resistance welding film layer. The organic acid super roughening process comprises the following steps that after a working solution of a printed circuit board resistance welding film layer pretreatment slot is completely discharged, the pretreatment slot is washed with tap water completely; circulating washing is performed with deionized water; an organic acid super roughening water solution is added and heated to 25-35 DEG C; a circulating filtering pump is started; a circuit board to be subjected to resistance welding film layer silk-screen printing is placed into the organic acid super roughening water solution to be soaked; the circuit board is taken out and is washed with the tap water; the circuit board is dried at the temperature of 70-80 DEG C; and the dried circuit board is transferred to the resistance welding film layer silk-screen printing process. According to the resistance welding film layer pretreatment organic acid super roughening process, through the manner of organic acid chemical super roughening, a copper surface of ultra high micro-roughness is formed, the quality defect that the resistance welding film layer falls in the subsequent surface treatment process of the circuit board is prevented, the production process is free of pollution, and the organic acid super roughening process is suitable for industrialized production.

The present invention relates to a frosted grinding roller and its production process. It is characterized by that said invention adopts grinding roller smooth roller, and utilizes high-temperature nozzle to make close right-rotary and left-rotary bidirectional or unidirectional scanning machining along roller body surface so as to produce contour micro roughness, and the mean height can be represented by roughness value Ra and can be 3.5-9.5 micrometer. Said frosted grinding roller has high surface hardness and can greatly raise working efficiency.

The invention discloses a papermaking method of multi-layer coated high-bulking high-whiteness matte coated paper. According to a preparation method, reasonable slurry selection is carried out, sulfate softwood pulp, bleached sulfate hardwood pulp and alkaline hydrogen peroxide mechanical pulp (the bulk is 3.0 cm<3>/g or above, and the whiteness is 75% or above) are adopted; proportioning of the various slurries are strictly controlled, a special coating formula is adopted; a base coat, a middle coat and a top coat are prepared at different proportions; and a unique MSP (double-sided top coating) and scraper coating process are adopted to perform multi-layer coating, and based on single-layer sandwich base paper with the speed as high as 1300m/min, parameters such as paper machine linear pressure and the like are controlled, so that reasonable microcosmic roughness and whiteness of paper surface are maintained, and obtained finished paper can meet the requirements of high-grade printing. The bulk of the finished paper is greater than or equal to 1cm<3>/g, and the ISO whiteness is greater than or equal to 88%.