38 results about "Silver plate" patented technology

The invention discloses a material with a silver coating for low-temperature brazing of brazing filler metal, and particularly relates to the field of brazing welding, which comprises the following steps: silver amalgam paste is prepared by oscillating and mixing silver powder and mercury according to the mass ratio of 1: 9-0.5: 9.5 in a manner and method for plating silver on the surface of base metal (metal, semiconductor, ceramic or glass); when brazing is carried out, the surface of the silver plating layer of the to-be-welded piece is coated with brazing filler metal, and then heating and pressurizing are carried out in a low-temperature interval of 120-350 DEG C in a vacuum, protective atmosphere or atmospheric environment to complete connection. According to the method, the amalgam reaction and isothermal solidification principles are utilized, a tough welding spot mainly comprising a silver-based solid solution is finally formed, generation of a large number of brittle intermetallic compounds is avoided, a connector has high strength, high reliability and excellent thermal fatigue resistance, and therefore the problems that gold-tin brazing filler metal is high in cost, the brittleness of the welding spot is large, and the welding temperature is high are successfully solved.

The invention provides double-silver coated glass capable of being tempered in different places and a preparation method of the double-silver coated glass, and relates to the technical field of coated glass. The invention provides double-silver coated glass capable of being tempered in different places, which comprises a glass substrate, the bottom dielectric combination layer, the first Ag functional layer, the first metal sacrificial layer, the middle dielectric combination layer, the second metal sacrificial layer, the second Ag functional layer, the third metal sacrificial layer and the top dielectric protection combination layer are sequentially deposited on the surface of one side of the glass substrate from inside to outside. Each of the bottom dielectric combination layer and the middle dielectric combination layer is formed by laminating more than two dielectric layers; the top layer dielectric protection combination layer is formed by laminating more than two dielectric layers and a top layer protection layer, and the top layer protection layer is located at the outermost layer. The double-silver coated glass provided by the invention has excellent high-temperature resistance and supports remote tempering and laminated processing treatment, and the tempered product has excellent performance; and an excellent heat insulation effect is achieved.

The utility model relates to the field of rhinestone production and processing, and provides a surface silver plating device for rhinestone production, and the surface silver plating device for rhinestone production comprises: a conveying rack for conveying plastic uptake sheets; the conveying frame is provided with a telescopic hook used for hanging the blister sheet. The silver plating mechanism is arranged under the conveying frame and used for plating silver on the surfaces of the rhinestones on the blister sheets; the draining mechanism is arranged under the conveying frame and used for draining the blister sheets and the rhinestones; the draining mechanism is provided with an air blowing piece used for air-drying the rhinestones. The device further comprises a heating part used for heating and drying rhinestones and an exhaust part used for absorbing harmful substances in air of the draining mechanism and the silver plating mechanism. According to the surface silver plating device for rhinestone production, the draining efficiency after silver plating can be improved, and meanwhile harmful substances are prevented from volatilizing, polluting the environment and affecting the health of workers.

This utility model discloses a selective silver plating device for terminal components, belonging to the field of silver plating technology. The key technical features include a U-shaped base with a liquid storage component fixedly connected to its top. Positioning rods are fixedly connected to the front and rear sides of the U-shaped base. The liquid storage component includes a storage tank, with vibrating cylinders fixedly connected to both sides inside the tank. A cover plate is movably connected to the top of the storage tank. A spraying component is slidably connected to the surface of the positioning rods. This invention solves the problem that existing silver plating devices struggle to guide the flow of the silver plating solution. In actual use, due to the lack of a spraying device, it is difficult to accurately adjust the flow direction of the silver plating solution according to the actual situation, resulting in the terminal components still needing to be completely immersed in the plating solution. This causes parts that do not need silver plating to be plated with silver, which not only wastes silver material and increases production costs but may also affect the quality of the finished product, reducing the practicality of the device.

The application specifically relates to a preparation method of a low-gas-content silver plate, comprising the following steps: S1, adding silver powder into a crucible to smelt into a silver liquid; S2, adding a blocky silver graphite solid into the silver liquid, the blocky silver graphite solid is dispersed into silver graphite powder at high temperature, the smelting temperature is reduced and heating is performed; S3, pouring the silver liquid into a mold, and cooling to obtain the silver plate. The blocky silver graphite scrap is used as a deoxidizer to remove oxygen in the molten silver liquid, one is that when the blocky silver graphite is placed on the surface of the high-temperature silver liquid, the blocky silver graphite is broken into silver graphite powder and covers the surface of the molten silver liquid, the silver graphite powder is in full contact with the silver liquid and continuously consumes oxygen in the silver liquid; two is that no impurity ions are introduced, and the purity of the silver plate is maintained; three is that the broken silver graphite powder of the blocky silver graphite scrap, since the graphite powder is micron-level or even nanometer-level powder, air gas is difficult to penetrate the silver graphite powder layer and enter the molten silver liquid, and further plays a role of air isolation.

1. Name of the designed product: Medallion (rotating tennis - brass plated with silver). 2. Use of the designed product: for collection and commemoration. 3. Design points of the designed product: in shape. 4. Picture or photo that best shows the design points: perspective view 1.

The utility model discloses a magnetic stirring device for a glass ornament silver plating tank in the technical field of magnetic stirring equipment, which comprises a magnetic stirring machine body and side plates, the side plates are fixedly connected to the front side wall and the rear side wall of the magnetic stirring machine body, and the upper sides of the inner side walls of the side plates are fixedly connected with springs. A first telescopic rod is connected to an inner cavity of the spring in a sleeved mode, a silver plating groove is fixedly connected to the tail end of the spring, a pushing rod is fixedly connected to the middle of the rear side wall of the silver plating groove, the tail end of the pushing rod penetrates through the side plate and extends to the rear side wall of the side plate, and a fixing table is fixedly connected to the rear side of the rear side wall of the side plate; the magnetic stirring device for the glass ornament silver plating tank is reasonable in structural design, the stirring effect can be improved, the stirring duration can be shortened, the production efficiency of glass products can be improved, solution splashing can be prevented, and solution waste is avoided.

The utility model discloses an intelligent silver plating tank for new energy automobile parts, and relates to the field of new energy automobile part processing, the intelligent silver plating tank comprises a plate surface, the two sides of the upper end of the plate surface are fixedly connected with mounting racks, the upper ends of the mounting racks are provided with drying assemblies, and the surface of the plate surface is provided with a silver plating box; and a circulating assembly is arranged in the mounting frame and comprises synchronous wheels rotationally connected to the inner side of the mounting frame, and the outer surfaces of the synchronous wheels are in transmission connection through a synchronous belt. By the adoption of the structure, parts enter the plating solution in the silver plating box along with the synchronous belt, silver plating is completed in the circulating moving process, and then the parts leave the silver plating box, so that the circulating moving silver plating process of the parts is achieved, and the parts can make uniform contact with the plating solution through circulating moving; the problems of different silver plating thickness, rough surface and the like caused by non-uniform flowing of the plating solution during silver plating at a fixed position are avoided, the silver plating quality is greatly improved, and the defective rate is reduced.

The invention relates to the technical field of stainless steel fastener surface machining, in particular to a nickel plating process which comprises the steps of S01, abrasive paper wiping and hanging; step S02, performing high-temperature ultrasonic oil removal; step S03, washing with water and electrolyzing; s04, water washing, copper polishing and first hydrochloric acid activation are carried out; s05, washing with water and ammonia nickel; s06, water washing, drying, secondary cathode electrolysis and secondary hydrochloric acid activation are carried out; s07, silver pre-plating and bright silver plating are carried out; s08, silver protection, water washing and drying; and step S09, appearance inspection and packaging. A nanoscale nickel crystal nucleus is formed through ammonia nickel treatment, so that the problem of plating layer cracking caused by stress concentration of a workpiece can be effectively avoided; by plating silver outside the nickel plating layer, the nickel plating layer can be effectively protected from being corroded, and the salt spray resistance of the workpiece is improved; the problems that in the prior art, a plating layer is extremely prone to falling off in a bending test, and the salt spray resistance is poor are solved.

The invention discloses a tool for connecting a TFT glass kiln electrode with a power source and a connecting method, and belongs to the technical field of TFT glass kiln electric heating. The tool comprises a tool body which is of a three-face rectangular frame structure with a blank top, and inward bent plates are arranged at the top ends of the two sides of the tool body. The three-side rectangular frame structure is matched with the outer side of the electrode; a tool inserting plate is movably arranged on the top of the tool body, and a pouring groove is formed in the tool inserting plate. A plurality of electrode connecting bolts with one ends extending out are arranged in the electrodes, and the electrode connecting bolts in one row are connected and fixed through electrode connecting pin shafts; the electrode connecting bolts are used for connecting the upper plate and the lower plate with the electrodes, and wiring terminals of the electrodes are arranged on the upper plate and the lower plate. Compared with the traditional silver plate connection, the tool-assisted connection mode can prolong the service life of the connection part, reduce the maintenance frequency and replacement cost, and further improve the stability and economical efficiency of the line body operation.

The utility model relates to cable technical field, and disclose an easy bending type flat cable, including conductor layer, the outside fixed mounting of conductor layer has insulating buffer layer, the outside fixed mounting of insulating buffer layer has silver plated copper braid, the inside of insulating buffer layer evenly distributed has a plurality of micro air cavity, the outside fixed mounting of silver plated copper braid has aluminium -plastic composite tape. The easy bending type flat cable, the conductor layer adopts the silver plated copper conductor of multiple twisted formation conductor beam, cooperates the flexible isolation strip of silicone rubber material, both strengthen the flexibility of conductor itself, and provide sufficient space for the deformation when bending, avoid the conductor and break because of extrusion, the micro air cavity in insulating buffer layer and foamed polypropylene material can absorb stress through compression and spring back when bending, the decompression groove of outer sheath and silicone grease reduce the surface friction and tension when bending, and multiple structures cooperate to make the cable can bear high frequency bending and not easily damaged, greatly prolong the service life.

The invention relates to the technical field of silver-coated copper powder, in particular to silver-coated copper powder with excellent color migration resistance and a preparation method of the silver-coated copper powder. Comprising the steps of copper powder pretreatment, surface coating treatment, chemical silver plating, antioxidant treatment, surface modification and finished product screening. The pretreatment step provides a clean active surface for a plating layer, the silver plating step forms a continuous conductive network, the post-treatment step ensures long-term stability, and the three processes jointly achieve improvement of the color migration resistance.

The invention discloses a silver purification method which comprises the following steps: (1) taking a crude silver plate containing more than or equal to 95% of Ag as an anode and a titanium sheet as a cathode, respectively putting the anodes and the cathodes into an anode chamber and a cathode chamber of a cation diaphragm electrolytic cell, introducing an electrolyte containing nitric acid, silver nitrate and an impurity complexing agent into the anode chamber, introducing an acidic silver nitrate electrolyte into the cathode, the impurity complexing agent is one of ethylene diamine tetraacetic acid disodium salt, 1-hydroxyethylidene-1, 1-diphosphonic acid and diethylene triamine penta (methylene phosphonic acid); (2) electrolysis is started, direct current is introduced, electrolysis is started, high-purity silver is separated out from a cathode, and the purity of the high-purity silver is larger than or equal to 99.99%; compared with other conventional silver electrolysis methods, the method has the advantages that the requirement for impurities of the anode crude silver raw material is lower, the crude silver does not need to be subjected to fire refining pretreatment, and the cost is lower.

The utility model relates to the technical field of glass ornaments, in particular to a fixing frame adjusting device for a glass ornament silver plating tank, and solves the problems that in the prior art, the fixing frame adjusting device and a fixing frame for bearing materials are inconvenient to adjust up and down, so that the materials are inconvenient to carry out immersion silver plating work at different depths, and the materials are inconvenient to stir; and the silver plating uniformity of the material is influenced. The problems directly cause the problem that the production efficiency is reduced. A fixing frame adjusting device for a glass ornament silver plating tank comprises a frame body, the inner side of the frame body is slidably connected with a bearing plate, the bottom of the bearing plate is fixedly connected with a fixing frame, and the bottom of the inner side of the frame body is fixedly connected with the silver plating tank. According to the utility model, through the up-and-down movement of the fixing frame, not only is the immersion silver plating work of glass materials in different depths in the silver plating tank realized, but also the operation process is greatly simplified, the operation complexity is reduced, the materials are stirred by the carding plate, and the silver plating uniformity is ensured.

The invention discloses cyanide-free silver plating equipment and a cyanide-free silver plating process, relates to the technical field of cyanide-free silver plating, and aims to solve the technical problem that the uniformity of cyanide-free silver plating is difficult to control due to surface geometric structure difference of braided copper wires, and the cyanide-free silver plating equipment comprises a rack, and a plating tank, a wire inlet tank, a wire conveying mechanism, a cleaning tank and a wire adjusting mechanism which are arranged on the rack. A dip angle deflection mechanism is arranged on the inner wall of the plating tank, and variable-taper-angle jet flow mechanisms are symmetrically arranged at the moving end of the dip angle deflection mechanism. The frame bodies are driven by the switching assembly to slide and can be switched between a conical state and an inverted conical state, so that jet flow diverging at a low speed or converging at a high speed is formed, a weaving type is identified, a corresponding jet flow mode is switched, then dip angle deflection is started to enable the jet flow to swing along an arc line, and meanwhile, a moving copper wire is electroplated. According to the method, the jet flow form and the space angle are dynamically adjusted, the problems of uneven flow field coverage and insufficient deep groove permeation caused by different weaving structures are cooperatively solved, high uniformity of a plating layer is achieved, and meanwhile the environment-friendly requirement of cyanide-free silver plating is met.

The utility model discloses a PCB electroless silver board welding ring circuit teardrop structure, and relates to the circuit board production field, the teardrop structure is symmetrically arranged between two adjacent welding rings, the two welding rings are connected through a wire, the teardrop structure is arranged on two sides of the wire, the teardrop structure comprises a wire connecting part and a teardrop part, the wire connecting part is connected with the teardrop part, and the teardrop part is connected with the wire connecting part. The tear dripping parts are arranged at the included angle position of the wire and the welding ring, the two ends of each tear dripping part are connected to the wire and the welding ring respectively, the wire connecting part is arranged on one side of the wire in parallel, the two ends of the wire connecting part are connected to the two tear dripping parts respectively, and the outer surfaces of the wire and the tear dripping structure are coated with anti-corrosion layers. And the circuit copper foil is prevented from being corroded by the galvanic effect in the silver melting production process to generate a thin neck phenomenon.

The invention discloses a preparation method of micro-nano spherical nickel powder and a technological method for directly depositing silver on the surface of the micro-nano spherical nickel powder, and belongs to the field of metal powder preparation technologies and surface treatment. Mixing and stirring the nickel ion solution and the complexing agent solution to obtain a nickel ion complexing system; the method comprises the following steps: adding a certain amount of an auxiliary agent into a nickel ion complexing system, stirring and dissolving to obtain a mixed reaction system of nickel salt, then keeping the temperature of the system constant, slowly adding a reducing agent solution at a constant speed, carrying out a reduction reaction to obtain a nickel particle suspension solution, and then filtering, washing and drying to obtain the micro-nano spherical nickel powder. And carrying out gradient silver deposition reaction on the nickel particle suspension solution after the reaction and the silver plating mixed solution to obtain a suspension solution with silver coated on the surfaces of the nickel particles, and then filtering, washing and drying to obtain the micro-nano spherical nickel powder with silver coated on the micro surface. According to the method, the nucleation and growth process of powder particles can be accurately controlled, the prepared nickel powder is high in sphericity degree, narrow in particle size distribution and clean in surface, a perfect substrate is provided for subsequent high-quality silver plating, island-shaped growth of a silver layer is avoided through the gradient plating technology, and the contact resistance is reduced compared with a traditional technology.

The invention relates to a nitrided part surface silver electroplating process, which belongs to the technical field of electroplating, and specifically comprises the following steps: sequentially carrying out pretreatment, copper pre-plating treatment, nickel pre-plating treatment, silver pre-plating treatment and silver plating treatment on a nitrided part; wherein the copper pre-plating treatment is to deposit a copper plating layer on the surface of the nitriding part so as to cover the nitriding layer. The pretreatment comprises light sand blowing, electrochemical oil removal, weak corrosion and neutralization treatment which are carried out in sequence. After silver plating treatment, passivation / anti-discoloration treatment is carried out. The problem of coating binding force is solved, the high-strength and high-wear-resistance part subjected to nitriding treatment can have excellent high-temperature anti-adhesion performance and higher appearance requirements at the same time, and the application prospects of the part in the high-end fields of aerospace, precise instruments and the like are further expanded.

The invention discloses a cavity surface treatment method for improving the quality factor of a quasi-optical cavity, and relates to the technical field of electromagnetism. According to the method, after aluminum is adopted to machine the quasi-optical cavity reflector, the surface of the reflector is plated with silver, a paint spraying material without metal components and wave-absorbing components is sprayed for paint spraying protection, and a protection layer with the thickness not exceeding one percent of the working wavelength of a quasi-optical cavity body is formed on the surface of the reflector. According to the method, the problem that the surface of the quasi-optical cavity is easily oxidized due to silver plating is solved, the quality factor of the quasi-optical cavity is improved, cavity protection measures are added, accurate measurement of the material loss angle tangent value is achieved, and the application range is wide.

The utility model discloses an ultra-light low-loss stable-phase coaxial cable, which belongs to the technical field of cables and comprises a protective sleeve, the inner wall of the protective sleeve is fixedly connected with an outer conductor, the inner wall of the outer conductor is fixedly connected with a dielectric layer, and the inner wall of the dielectric layer is fixedly connected with an inner conductor. The inner conductor comprises a plurality of silver-plated copper-clad aluminum magnesium alloy single wires, the protective sleeve comprises a wear-resistant layer, an anti-corrosion layer, a filling layer, a shielding layer and an insulating layer, and through cooperation of the outer conductor, the dielectric layer, the inner conductor and the silver-plated copper-clad aluminum magnesium alloy single wires, the cable has the advantages of being light in weight, low in loss and good in phase stability. Through the arrangement of the wear-resistant layer, the anti-corrosion layer, the filling layer, the reinforcing rope, the shielding layer and the insulating layer, the cable not only has the characteristics of corrosion resistance and friction resistance, but also has the advantages of stretching resistance and stable transmission at the same time, so that the service life of the cable is longer.

The invention discloses a method for rapidly plating silver on a copper surface at normal temperature based on chemical and mechanical friction and silver plating paste thereof. The silver plating paste is formed by mixing silver powder, potassium hydrogen tartrate and sodium chloride according to a specific proportion. The method comprises the following steps: carrying out cleaning pretreatment on the surface of the copper alloy, combining the silver plating paste with a wet wiping material, and carrying out manual friction on the surface of the copper alloy, so that a bright and compact silver plating layer with good binding force can be rapidly formed at normal temperature. The method does not need a power supply and complex equipment, is simple in process, low in cost and environment-friendly, and is particularly suitable for small-batch field operation and silver plating of artware jewelry.

The application discloses a PCB blind hole silver filling device and method, and relates to the technical field of PCB electroplating, which comprises a positioning base arranged at the middle line position of the bottom of an electroplating tank, a positioning hanging base arranged at the top of the electroplating tank in a detachable manner and used for clamping a circuit board to be plated with silver, a side spray pipe arranged vertically along the depth direction of the electroplating tank and used for spraying silver plating liquid towards the circuit board, a bottom spray pipe arranged horizontally and transversely to the electroplating tank and used for spraying silver plating liquid obliquely upwards to enhance liquid disturbance, a movable spray pipe which can move along the length direction of the electroplating tank and rotate around its own axis and is used for spraying silver plating liquid to the side surface of the circuit board in a fan shape and into the blind hole, and a plurality of groups of spray pipes which are connected with liquid supply pipes of the electroplating tank and used for cooperatively supplying silver plating liquid. Through the multi-directional spraying and dynamic rotating silver spraying mechanism, a composite flow field circulation is formed in the blind hole, the uniformity and compactness of silver layer deposition in the circuit board and the blind hole are improved, and the problems of limited liquid flow and uneven silver layer in the existing electroplating of the blind hole of the circuit board are solved.

The invention relates to the field of automobile parts, in particular to an electroplating process of a data transmission terminal for an automobile connector and a product. The preparation method comprises the following steps: activation: sequentially carrying out oil removal and activation treatment on a base material of a phosphor copper material to obtain an activated base material; electroplating: plating silver on the activated base material through environment-friendly electroplating liquid to obtain a silver-plated base material; passivation: carrying out passivation treatment on the silver-plated base material to obtain a passivated base material; sealing: sealing the passivated base material to obtain a data transmission terminal; the electroplating liquid is prepared from the following raw materials: silver ions with the concentration of 5 to 15g / L, thiosulfate with the concentration of 100 to 150g / L, a silver plating accelerant with the concentration of 3 to 8g / L, other auxiliary agents with the concentration of 1 to 5g / L, 0.3 to 0.8 g / L of POSS-octa-epoxy group nano silicon dioxide dispersion and the balance of diluent. The silver plating accelerant is composed of cardanol glycidyl ether, sulfonic cellulose nanocrystals and a high-molecular compound containing sodium sulfonate groups.

The utility model discloses a safe level coaxial cable, include: silver plated copper conductor and coaxial setting in succession in the insulating layer, sheath layer of silver plated copper conductor outside, first isolation layer and second isolation layer between setting have first braided shield layer, second braided shield layer in proper order, first braided shield layer and second braided shield layer between, second braided shield layer and second isolation layer between respectively setting have first armoring layer, second armoring layer, the insulating layer is by the first insulating layer of compactly covering in the conductor outside and the second insulating layer of covering in the first insulating layer outside constitute, first insulating layer and the second insulating layer between setting have a plurality of metal wires along the circumferential arrangement, every metal wire all embeds its two sides first insulating layer, second insulating layer in. The utility model can reduce the electromagnetic interference of outside, can improve the overall structural strength while guaranteeing the bending performance, guarantees the stability in the long -term use process.

The application discloses a kind of multi-size cathode roll titanium cylinder automatic silver plating equipment and method, belong to cathode roll electroplating technical field.Equipment includes rotating device, electroplating device and control device;Rotating device is by rotating disc, telescopic mechanical arm, motor and Z axis, realize the 360 ° rotation and 0 ~ 4m lifting of mechanical arm;Electroplating device includes the brushing clamp connected with mechanical arm, and inlet and electrical connection are provided on clamp;Control device uses PLC control system to realize full-process automatic operation.The application method includes oil removal activation, pickling descaling, nickel plating and silver plating four steps, and the accurate pH value, voltage, current, speed and lifting parameters are set in each step, and the liquid supplement amount is automatically adjusted by closed-loop control.The application can be adapted to the inner diameter 2 ~ 4m, height 1 ~ 3m of multi-specification titanium cylinder, and the thickness deviation of silver plating layer is ≤±3%, without pockmark scratch, with strong bonding force;Production efficiency is improved by 50%, raw material cost is reduced by 20%, and the consistency and automation level of silver plating quality are significantly improved.

This invention provides a fine-tuning device for surface-mount filters, belonging to the technical field of filter manufacturing equipment. It includes a base plate; a loading module connected to the base plate; the loading module having a first through slot for loading a surface-mount filter carrier disk; a micro-motion module including a first stepper motor, a first support base, a disk, a connecting rod, a platform slider, and a slide rail; the first stepper motor is fixed on the first support base and drives the disk to rotate; both ends of the connecting rod are connected to the disk and the platform slider respectively; the first support base and the slide rail are both fixed to the base plate; the platform slider is slidably connected to the slide rail; the disk, connecting rod, and platform slider form a crank-connecting rod mechanism; and a silver spray plate with silver spray holes; the silver spray plate is connected to the platform slider and located directly below the first through slot. This invention overcomes the drawbacks of cumbersome traditional vapor deposition fine-tuning operations, significantly improving the efficiency of vapor deposition fine-tuning of surface-mount filter frequencies, thereby increasing filter production efficiency and reducing production costs.

The invention provides low-resistance and high-weather-resistance surface modified silver-coated nickel powder and a preparation method and application thereof.The preparation method comprises the steps that chemical silver plating is conducted on the surface of nickel powder under the weak acid condition, and silver-coated nickel powder is obtained; and grafting an organic modifier on the surface of the silver-coated nickel powder to obtain the surface modified silver-coated nickel powder. Wherein the organic modifier comprises a sulfydryl compound and sulfydryl amino acid. The compact silver layer is prepared through chemical silver plating under the weak acid condition, so that the silver layer is completely coated, the conductivity and the weather resistance are improved, protection is achieved through grafting of the organic modifier, the compatibility of the silver-coated nickel powder and a resin matrix is improved, and the finally obtained surface modified silver-coated nickel powder is excellent in acid and alkali resistance and high in stability in a severe environment, and has a good application prospect. When the conductive paste is used in the HJT battery, low resistivity and high weather resistance are obtained at the same time.

The application discloses a precise silver plating process for a new energy automobile heat dissipation fin, and increases a precise positioning tool in a traditional silver plating process, so that silver plating is only performed on positions needing silver plating, thereby meeting the requirement of precise silver plating, and the use of silver plating is ensured through the design of the tool, thereby fundamentally reducing the cost of products. The application provides a precise silver plating process for a new energy automobile heat dissipation fin, increases a film pasting process in a traditional process, increases a reinforcing agent in a PET film, so that the PET film has acid and alkali resistance, and has high temperature resistance, so that the PET film can be soaked in a silver plating tank together with the heat dissipation fin, the heat dissipation fin covered by the film is isolated from a silver plating solution, so that only the positions needing silver plating perform silver plating reaction, other positions are in a protection state and are not affected, and finally, precise silver plating is realized, thereby reducing the amount of silver, saving cost, and using an automatic device in the process further reduces the process cost.

The invention relates to the technical field of copper-clad ceramic substrate manufacturing, in particular to a method for preventing silver from being coated on a side wall during silver melting of a copper-clad ceramic substrate, which comprises the following steps of: (1) carrying out chemical silver plating on the copper-clad ceramic substrate to form silver layers on the surface and the side wall of the substrate; (2) forming an alkali-resistant protective layer on the silver layer on the surface of the substrate; (3) soaking the substrate obtained in the step (2) in a weakly alkaline etching solution to remove the silver layer on the side wall; and (4) carrying out alkaline film stripping treatment on the substrate obtained in the step (3) so as to remove the alkali-resistant protective layer. According to the method, the side wall silver layer can be accurately removed, meanwhile, it is ensured that the functional silver layer on the surface is intact and lossless, potential damage to a substrate material is reduced through mild chemical conditions, the controllability and safety of the technology are enhanced, and therefore the problems of insulation performance degradation and partial discharge risks caused by the ceramic side wall silver layer are fundamentally solved; and the long-term operation reliability of the power semiconductor module in a high-voltage environment is remarkably improved.