14 results about "Tin-silver-copper" patented technology

This invention relates to the field of solder powder technology, specifically to an antioxidant solder powder and its preparation method. The solder powder uses SAC305 tin-silver-copper alloy solder powder as a matrix, and its surface has an antioxidant treatment layer formed by segmented anchoring of single-terminated phosphate-based polyether oligomers and spacer regulation by polyethylene glycol monomethyl ether. During preparation, under nitrogen protection, the following steps are performed sequentially: ethyl acetate pre-cleaning, aqueous isopropanol water-limited hydroxylation, two-stage single-terminated phosphate-based polyether anchoring, polyethylene glycol monomethyl ether sacrificial spacer treatment, washing, drying, and sieving. The resulting solder powder exhibits low total oxygen increment after 168 hours of open aging at 40°C and 75% RH. Solder paste made from this powder exhibits low viscosity drift, high spreadability, and low solder joint void ratio, making it suitable for high-reliability electronic assembly solder paste.

The application discloses a high-lead semiconductor solder wire with an anti-oxidation surface, a manufacturing process and application thereof, and belongs to the technical field of welding materials. The solder wire comprises the following components in percentage by weight: tin: 5-10%; silver: 0.5-1.5%; copper: 0.1-0.5%; bismuth: 0.1-0.3%; antimony: 0.1-0.3%; red phosphorus: 0.05-0.1%; germanium: 0.05-0.1%; and lead: the balance. The high-lead semiconductor solder wire produced by the alloy ratio and process conditions of the application has a more stable and dense surface structure, reduces active sites for reaction with oxygen, forms a protective film with an anti-oxidation effect on the surface of the solder wire, further prevents the contact between oxygen and the solder wire, and thus realizes a better oxidation prevention effect.

The invention provides an embedded micro-channel based on additive manufacturing and a preparation method thereof, the embedded micro-channel is suitable for heat dissipation of a high-power electronic device, and the first scheme is single-substrate integrated electroplating: sequentially forming a seed layer and graphical photoresist on a substrate, controlling electroplating to enable copper to grow vertically and transversely, and forming an all-copper micro-channel cavity with a closed top in a self-closing manner; turbulent flow structures such as micro-columns, waves or fins are integrally formed; according to the second scheme, complementary half cavities are formed through electroplating, tin-silver-copper solder is applied after surface nickel plating, a complete flow channel is formed through reflow soldering bonding, photoetching and electroplating are utilized in the two schemes, an integrated structure which is high in precision and free of interface thermal resistance is achieved, the heat exchange efficiency is remarkably improved, and the heat exchange efficiency is improved. Moreover, the material utilization rate is high, and ceramic, silicon and glass substrates are compatible, and are respectively suitable for high-end power modules and low-cost consumer electronics scenes.

This application provides a high spreadability halogen-free and lead-free solder paste, comprising solder alloy powder and flux. The solder alloy powder consists of tin, silver, copper, zirconium, yttrium, rhodium, and palladium. The addition of yttrium significantly improves the strength, hardness, and heat resistance of the tin alloy, increases the melting point of the solder wire, and enhances the oxidation resistance and ductility of the tin alloy. The addition of trace amounts of rare earth elements to the tin alloy improves the solidification and crystallization state of the solder, increases the melting point of the solder wire, and improves the tensile strength and toughness of the solder. The flux includes rosin, thermosetting resin, thixotropic agent, activator, surface activator, and solvent. The copolymer of rosin and thermosetting resin is used as the main component, which not only enhances the soldering ability of the metal surface but also improves the elongation toughness of the solder wire. It can effectively reduce the presence of post-soldering residues, avoid corrosion of the substrate, and prevent the final product from being affected. The method for preparing a high spreadability halogen-free and lead-free solder paste provided by this invention involves the sequential preparation of flux and solder alloy powder. The process is simple, the reaction is mild, and no harmful gases are generated during the process, making it suitable for mass production.

The invention relates to a raw material composition of a conductive paste, the conductive paste, a battery piece and a preparation method thereof, and belongs to the technical field of conductive pastes.The raw material composition of the conductive paste is prepared from, by mass, 72%-82% of composite powder, 15%-25% of organic carriers and 3% of nickel powder; the composite powder comprises tin powder, silver powder and copper powder. After the paste disclosed by the invention is cured, the molten tin-silver-copper and the silver grid line form good ohmic contact, and the molten nickel powder fills pores generated by shrinkage of the grid line and permeates into the pores formed by melting of the tin-silver-copper, so that the compactness and continuity of the grid line are remarkably improved, and the resistivity of the grid line is greatly reduced.

The application provides a high-wetting halogen-free lead-free soldering paste, which comprises solder alloy powder and flux, wherein the solder alloy powder comprises tin, silver, copper, zirconium, cerium, scandium and iridium; by adding a small amount of rare earth elements scandium and cerium and a small amount of metal elements zirconium and iridium, signal interference caused by the soldering paste when used for integrated circuit board assembly can be reduced, signal interference caused by material nonlinearity can be reduced, the mutual cooperation of scandium and iridium has good heat conduction, electric conduction and ductility, the storage stability of the soldering paste is improved, the strength, hardness and heat resistance of the alloy are improved, the surface insulation resistance and reliability are improved, and the dielectric loss is reduced. The application further provides a preparation method of the high-wetting halogen-free lead-free soldering paste, wherein the flux and the solder alloy powder are prepared in sequence, the process is simple, the reaction is mild, no harmful gas is generated in the process, and the method is suitable for mass production.

The invention relates to the technical field of solder paste production, in particular to a solder paste formula capable of reducing solder joint holes and a preparation process. The solder paste formula capable of reducing solder joint holes comprises tin, silver, copper, rosin, a solvent, a trace additive element group package, a curing group package, a reduction group package, antimony, manganese, glutaric acid, benzotriazole and a surfactant. According to the process, stable electrical connection is provided by reducing welding spot cavities, and a larger and more continuous path is formed in a welding spot due to small cavity current, so that the phenomenon of current crowding is reduced, and local overheating and potential signal interruption risks are avoided; the welding spots are not only electrically connected, but also key heat conduction paths of power devices such as a CPU, a GPU and a power MOSFET, metal is a good heat conductor, the cavities are heat insulators, the welding spots with small cavities are lower in thermal resistance, heat generated by a chip can be more efficiently transmitted to a PCB and dissipated, the junction temperature of the chip can be directly reduced, and the small cavities are used for preventing the devices from being overheated, so that the reliability of the device is improved. And the long-term reliability is ensured.

This invention relates to the field of tin alloy solder technology and discloses a lead-free multi-element alloy solder, a tin material. The tin material is formed by pouring molten liquid metal into the interior of a mold assembly and cooling it. The composition of the tin material includes tin, silver, copper, bismuth, antimony, and nickel. The weight ratio of the composition of the tin material is: tin: 92-93 parts; silver: 2-3.5 parts; copper: 0.46-0.54 parts; bismuth: 1-2 parts; antimony: 2.5-3 parts; nickel: 0.05-0.1 parts. This invention uses a first scraper that moves on the top of the mold body to scrape off oxides and impurities on the surface of the liquid metal. When the first scraper moves to one side of the fixed frame, it moves to the side of the second scraper. Then the first scraper moves upward, and the second scraper can scrape off the oxides and impurities on the first scraper, avoiding secondary pollution. This allows for the cyclical scraping of oxides and impurities on the surface of the liquid metal, improving the aesthetics of the tin material and the overall quality of the soldering.

The application provides an insulating mounting base of a piezoelectric vibration sensor and a preparation method thereof, relates to the technical field of piezoelectric vibration sensors, and rigidly connects an insulating gasket between an upper seat and a lower seat in a fusion welding mode, realizes electrical insulation between the upper seat and the lower seat through the barrier of the insulating gasket, and realizes the rigid connection between the upper seat, the insulating gasket and the lower seat through a eutectic welding process combining an aluminum nitride ceramic copper-clad plate and a tin-silver-copper soldering sheet, so that the bonding strength of the bonding surface is high and the mechanical impact resistance is good. The upper seat of the insulating mounting base is fixed on the piezoelectric ceramic vibration sensor through screwing, and then the lower seat is fixed on the object to be tested through screwing, so that the rigid connection between the sensor and the object to be tested is realized, the GND crosstalk problem is solved, the structure is simple and compact, the cost is low, the use is convenient, the insulation effect is good, the rigid connection is realized, and the sensor output signal can be prevented from being disturbed.

The invention discloses a tough soldering flux for tin-silver-copper alloy soldering lug coating and a preparation method of the tough soldering flux, and the soldering flux comprises the following components in percentage by mass: 10%-20% of a film-forming agent, 2%-5% of an activating agent, 1%-2% of a toughening component, 0.05%-1% of a surfactant, 0.05%-0.15% of a corrosion inhibitor, 5%-10% of a cosolvent and the balance of a solvent. The toughening component is selected from one or two of polyurethane and acrylic acid rosin ethylene glycol diglycidyl ether. By introducing the toughening component and optimizing the proportion of the film-forming agent, the solvent and the like, the obtained flux coating has excellent flexibility and punching resistance, broken particles generated in the welding strip punching process can be remarkably reduced, adhesion and abrasion to a mold are reduced, the continuous working time of the mold is prolonged, and therefore the production efficiency and the product yield are greatly improved; and meanwhile, good welding performance is kept.

The utility model discloses a kind of tinned silver copper alloy stranded conductor processing equipment, belong to stranded conductor processing technical field, aiming at the burr produced in the process of wire stranding reduces the problem of product appearance quality, including bottom plate, the bottom plate top is fixedly connected with branch plate, the utility model is through being provided with cleaning mechanism, after stranding, wire passes through from inside carousel and first disc, knob rotation drives worm rotation, so that worm gear cover drives carousel rotation, multiple arc-shaped guide slots promote guide pillar to move, multiple guide pillars drive multiple sliding slots to move simultaneously to inner end, so that multiple scrapers move inward and adhere to wire surface, in the process of conveyor moving wire, multiple scrapers and wire surface friction to remove burr, to improve the smoothness of conductor surface, not only improve the appearance quality of conductor, but also ensure the electrical performance of conductor, avoid the electrical contact bad or signal interference caused by burr.

The invention relates to a tin solder with high welding spot smoothness and a preparation method thereof, and relates to the technical field of metal welding materials, the tin solder comprises the following components in parts by weight: 0.3-4.0 parts of silver, 0.1-1.0 part of copper, 0.5-8.0 parts of indium, 0.005-0.5 part of gallium, 0.001-0.01 part of germanium, 0.002-0.02 part of an endogenous nucleating agent and the balance of tin; the endogenous nucleating agent is titanium or manganese. The preparation method comprises the following steps: smelting in advance to prepare a Sn-Ti or Sn-Mn intermediate alloy; melting tin, silver and copper to prepare matrix alloy liquid; cooling, adding the intermediate alloy, and dispersing by utilizing shearing force; and further cooling, adding indium, gallium and germanium, gently stirring, standing, and casting, extruding and forming. The endogenous nucleating agent induces the solidification interface to advance from inside to outside, and in cooperation with the volume repulsion effect of crystal growth, the low-surface-energy components indium and gallium are promoted to be enriched towards the surface and form a liquid film to fill up microdefects. And the obtained welding spot is extremely low in surface roughness, small in contact resistance, excellent in oxidation resistance and relatively high in shear strength and thermal fatigue resistance.

The application relates to the field of welding materials, and more particularly to a high-temperature-resistant and oxidation-resistant tin paste and a preparation method thereof. The raw materials of the high-temperature-resistant and oxidation-resistant tin paste include a tin-silver-copper alloy, a temperature-resistant copolymer resin, an antioxidant, a thixotropic agent, a corrosion inhibitor, a dispersing agent and a functional composite, etc. The tin paste material prepared finally not only has excellent high-temperature resistance and oxidation resistance, but also has good corrosion resistance, waterproofness and toughness, etc., so that the problems of the high-temperature resistance and oxidation resistance of the existing tin paste material are solved, the performance contradictions of the tin paste material are eliminated, the comprehensive performance requirements of the tin paste material in the existing electronic product field are met, and the tin paste material has wide application potential.

This invention belongs to the field of power device processing technology, specifically relating to an aluminum nitride ceramic substrate with copper-plated surface and its preparation method. The copper-plated aluminum nitride ceramic substrate comprises an aluminum nitride ceramic plate, a magnetron sputtered copper layer, a tin-silver-copper metal paste, and copper foil, and its composition is carried out according to the following process flow: 1) surface cleaning treatment of the aluminum nitride ceramic substrate; 2) vacuum copper plating on the surface of the aluminum nitride ceramic substrate; 3) tin-silver-copper metal paste printing; 4) stacking copper foil; 5) pre-pressing vacuum furnace welding. This invention provides a method for copper-plating aluminum nitride ceramic substrates, which offers advantages such as simple metallization operation, low welding temperature, high production efficiency, low cost, fewer porosity defects at the substrate-metal layer junction, and strong copper foil adhesion.