50 results about "Ultrasonic soldering" patented technology

The invention relates to encapsulation and assembling interconnection methods of micro-electronic and optoelectronic devices, in particular to a room temperature ultrasonic soldering method for area array encapsulated electronic components. The method comprises the following steps of: (1) preparing an area array encapsulated device; (2) preparing a corresponding pad; (3) aligning the area array encapsulated device with the position of the pad; (4) applying certain supersonic vibration and longitudinal pressure on the area array encapsulated device by using a transverse vibration ultrasonic vibrator, so that the solder lug boss generates high-frequency friction with the corresponding pad surface, gradually falls down, and forms metallurgical connection with the pad of the base plate. The invention has the advantages that the tangential vibration ultrasonic waves are utilized at room temperature to connect the area array encapsulated device with the solder alloy solder joint, thereby preventing the soldered structure from undergoing the process of the reheating cycle, eliminating the formation of the heat stress, inhibiting the nucleation and grain growth of the intermetallic compounds and enhancing the reliability and the electrical performance of the joints. The method also has the advantages of simple procedure, high speed, no soldering flux, no need of strict surface cleaning, and the like.

The utility model discloses a WC particle in-situ reinforced hard alloy and steel ultrasonic soldering method, which is used for the high-quality soldering of a sheet hard alloy and steel. The method comprises the following steps: a, polishing a surface to be connected before soldering, and cleaning the polished surface with acetone; b, placing an Ag-based solder foil piece between the hard alloy and the steel before soldering; c, applying ultrasonic vibration to the hard alloy to be soldered and the steel to be soldered; d, implementing a soldering process by adopting a common heat source manner common in furnace soldering or high-frequency induction heating soldering and the like, wherein soldering temperature is 730 to 850 DEG C; e, after ultrasonic vibration, WC particle reinforced soldering seams are obtained by naturally cooling. According to the method, Co substrate adhesion-free WC particles are migrated into the soldering seams to form WC particle reinforced soldering seams by virtue of disturbance action of ultrasonic waves after a Co substrate in the hard alloy is dissolved by a solder, so that the mechanical performance of a joint is greatly improved; oxide films on the surfaces of the hard alloy and the steel are removed by virtue of action of ultrasonic cavitation, and soldering can be implemented in the atmosphere without a soldering flux, so that the process is simple, and the method is environment-friendly, high in welding efficiency and suitable for engineering application.

A heat dissipation substrate for encapsulating a power module comprises a substrate made of pure copper or copper alloy or pure aluminum or aluminum alloy, and heat dissipation needles are fixedly connected on the surface of the substrate by adopting a soldered joint method or an ultrasonic soldering method or an integral press fit method or an integral casting method or an integral forging method. The thickness of the substrate is 1-10mm, and the area of the substrate is 0.01-0.5sqm. The heat dissipation needles are made of pure copper or copper alloy or pure aluminum or aluminum alloy, and are in the shape of a cylinder or a circular truncated cone or a cube or a rectangle, and the height of the heat dissipation needles is 2-50mm. The heat dissipation substrate for encapsulating the power module can improve heat dissipation capacity of a traditional module, prolong the service life of the power module, and improve the reliability of the power module.

A method for tenaciously connecting a conductor electrode on a glass substrate to a ribbon conductor with certainty at low cost without causing damage. An indium-solder-coated copper foil ribbon conductor 1 obtained by depositing an indium solder 3 (100-90% indium and 10-0% silver) in a thickness of 100 μm or smaller on one side of a copper foil or tin-coated copper foil 2 having a thickness of 300 μm or smaller and optionally further depositing the solder thinly on the other surfaces of the foil is placed on an exposed part of a molybdenum-based metallic back electrode layer 4B on a glass substrate 4A. An ultrasonic soldering iron 5 is then placed against the upper side of the copper foil ribbon conductor 1 to melt the indium solder 3 and connect the copper foil ribbon conductor 1 to the electrode layer 4B.

Another method includes soldering an indium solder 3 (having the same composition as shown above) to the electrode layer 4B beforehand, subsequently placing a ribbon-form copper foil or tin-plated copper foil 2 thereon, and connecting the copper foil 2 to the electrode layer 4B with an ultrasonic soldering iron 5.

The invention discloses an ultrasonic soldering flux coating process which comprises the following process steps of: 1. injecting a soldering flux into a soldering flux box; 2. selecting a proper spraying head plate, and simultaneously regulating the input current of a high-frequency ultrasonic atomizer as required, thereby controlling the atomized quantity of the soldering flux and the concentration of the atomized soldering flux sprayed out of a spraying head; 3. when a PCBA (Printed Circuit Board Assembly) conveyed by a conveying belt is induced by a position sensor installed on an ultrasonic soldering flux coated box body, beginning the work of the high-frequency ultrasonic atomizer and a centrifugal fan, and uniformly spaying the small-granular soldering flux atomized by the high-frequency ultrasonic atomizer onto the PCBA from the spraying head of the spraying head plate at constant speed; and 4. when the PCBA leaves, stopping the work of the high-frequency ultrasonic atomizer and the centrifugal fan until the next PCBA is induced by the position sensor, and returning to the step 3. The invention also discloses an ultrasonic soldering flux coating device for realizing the process. The invention has the advantages of uniform spraying, easy control, random regulation on the size, the height and the width of sprays as required, waste reduction of the soldering flux and reduction of environmental pollution caused by soldering flux flying.

The invention provides a method for quickly evaluating the growth tendency of Sn whiskers of Sn-based solder, which provides a carrier for the growth of whiskers by preparing Mg/Sn-based solder/Mg ultrasonically assisted brazing joints. In the process of ultrasonic brazing, due to the action of ultrasonic waves, a large number of Mg atoms enter the liquid solder, and most of the Mg atoms combine with Sn atoms to generate Mg at the interface and inside the solder. ₂ Sn; another part of Mg atoms exists in the solder in the form of solid solution. After the solder is solidified, the solid-dissolved Mg atoms are in a thermodynamically unstable state, and Mg atoms react with Sn atoms to form new Mg atoms. ₂ Sn, and produce volume expansion, which in turn creates stress in the weld. Sn whiskers grow rapidly under stress. The invention can compare the Sn whisker growth tendencies of different solders by statistically comparing the whisker growth conditions on the surface of welds prepared by different Sn-based solders, and provide important solder reliability parameters for the electronic industry.

The invention provides an aluminium wire coil made by ultrasonic soldering and manufacturing method thereof. The invention plates on surface of wire by ultrasonic soldering so as to improve soldering force between the printed circuit board and copper foils and ensure the conductive property, omit pretreatment of soldering and increase work efficiency and production efficiency, prevent environmental pollution caused by using flux. The invention provides an aluminium wire coil made by ultrasonic soldering, comprising steps of forming insulating coating on surface of aluminium wire, dipping a wire end on which the coating is removed into a solder box applied ultrasonic wave to form a solder plated layer by ultrasonic soldering.

The invention discloses an ultrasonic soldering device, which comprises a soldering machine. An ultrasonic transducer is arranged on the soldering machine. The ultrasonic transducer is connected with an ultrasonic generator. Oxide films can be removed very quickly before soldering by using ultrasonic waves, only the oxide films instead of parts which are not oxidized are removed by adjusting the frequency of the ultrasonic waves, and the removing accuracy is high.

The invention discloses active brazing filler metal which is prepared from, by mass, 3-10% of Zn, 1-3% of Ti, 0.01-0.1% of Ce, 35-45% of Sn and the balance Pb, wherein the total mass percentage of thecomponents is 100%. The invention further provides a preparation method and application of the active brazing filler metal. The active brazing filler metal has good soldering performance below 220 DEG C, circuits are directly soldered on a photovoltaic cell panel with an ultrasonic soldering iron, silver paste is replaced, meanwhile, a solder strip plated with the active brazing filler metal is subjected to series-parallel soldering without scaling powder, a joint point of the active brazing filler metal has low contact resistance and high strength, and the alloy cost is low.

A structure of a panel which can be thinned down to about a panel thickness of a PDP and a manufacturing method thereof are provided. A gas filling hole is provided to a surface of a rear glass substrate of a PDP, the surface coming in contact with a front glass substrate of the PDP. Vacuuming and filling of a discharge gas are performed through the gas filling hole. After filling of the discharge gas, a mechanism for lifting solder iron up and down and supplying solder provided inside a chamber inserts a tip of an ultrasonic soldering iron into the gas filling hole to start supplying a solder which is a material for a plug sealant. When a series of forming steps of the plug sealant are finished, the ultrasonic soldering iron is retreated before the solder is solidified to finish formation of the plug sealant.

The invention discloses an automobile wheel brow. The automobile wheel brow comprises a wheel brow body and a bracket; the bracket is welded and fixed to the wheel brow body in an ultrasonic way; a plurality of first buckle units and a plurality of second buckle units are installed on the bracket; each first buckle unit comprises a first buckle; each first buckle comprises an anchor-shaped conicalguide end; a metal plate of the body side is provided with first clamping holes matched with the conical guide ends; the bottom end of each conical guide end is integrally provided with a thin-wallpart matched with the wall of the corresponding clamping hole; each second buckle unit comprises a second buckle; and an automobile bumper is provided with second clamping holes matched with the second buckles. According to the automobile wheel brow, the wheel brow body and the bracket are firmly connected and do not drop, so abnormal sounds generated in a running process of an automobile are prevented. After the first buckles are assembled, the thin-wall parts of the first buckles make surface contact with the metal plate of the body side so that the first buckles can be firmly and reliably assembled on the metal plate of the body side; loosening of the first buckles is effectively prevented; and the installation effect of the wheel brow is guaranteed.

An ultrasonic bonding tool is used on a horn side or anvil side of an ultrasonic joining device in which two synthetic resin sheets that include a polyethylene layer, a polypropylene layer and a ceramic heat-resistant layer are superposed and joined together so that the heat-resistant layers face each other. The ultrasonic bonding tool includes a plurality of protrusions shaped as quadrangular pyramids having a flat top surface. Each of the protrusions has an apex angle formed by two mutually opposite side surfaces that is within a range of 110-130°. When two separators of a battery cell are joined together using the ultrasonic bonding device with the ultrasonic bonding tool, a force with which the separators adhere to the protrusions is weak. In this way, the separators do not adhere to the horn during ultrasonic bonding of the synthetic resin sheets.

A thermocouple for temperature measurement according to an embodiment may include a first wire of a first metallic material and a second wire of a second metallic material different from the first metallic material, a first section in which the first wire and the second wire are electrically insulated from each other, a second section in which the first wire and the second wire are connected to each other to form a measuring junction, a first layer of a thermally conductive and electrically insulating first material enclosing the second section, and a second layer of an ultrasonic-weldable second material enclosing at least part of the first layer.

The invention provides a preparation method of a lithium ion capacitor. The preparation method comprises the following steps that: a positive-pole current collector is prepared; 2, a positive-pole electrode sheet is prepared; 3, a negative-pole current collector is prepared; 4, a negative-pole electrode sheet is prepared; 5, a diaphragm is prepared; 6, a material for preparing electrolyte is selected; 7, an aluminum-plastic film is prepared; 8, materials for preparing electrode lugs are selected; and 9, the capacitor is prepared. According to the step 9, the positive-pole electrode sheet, thediaphragm and the negative-pole electrode sheet are laminated so as to form a battery core; the positive-pole electrode lug and the positive-pole current collector are welded by means of ultrasonic soldering; the negative-pole electrode lug and the negative-pole current collector are welded by means of ultrasonic soldering; the battery core is packaged with the aluminum-plastic film at temperaturefrom 100 to 250 DEG C; the electrolyte is injected from a liquid injection opening, the liquid injection opening is sealed; standing, formation, liquid extraction and grading are performed, so that the lithium ion capacitor can be prepared. The energy density of the lithium ion capacitor prepared by using the preparation method of the invention can achieve 60 wh/kg; the voltage of the lithium ioncapacitor ranges from 4.2 to 2.8 V; and the energy density and voltage of the lithium ion capacitor prepared by using the preparation method are significantly improved compared with the energy density and voltage of a general super-capacitor; the internal resistance of the capacitor can be reduced; and the high-rate cycle life of the capacitor can be prolonged.

An electrolytic copper foil having improved thermal properties. The electrolytic copper foil comprises a roller surface and a deposition surface, each of the two surfaces having a roughness Rz of less than or equal to 2 [mu] m, and wherein the electrolytic copper foil has a main weight increase of 105 wt% when the electrolytic copper foil is subjected to thermogravimetric analysis (TGA) and a main temperature (T105 wt%) is reached during TGA, and wherein the T105 wt% is in the range of 350 DEG C to 501 DEG C. Characteristics of the TGA include heating at a rate of 5 DEG C/min and an airflow of air at a rate of 95 mL/min. Ultrasonic soldering of the copper foil to the nickel foil provides an excellent weld with low separability, thereby providing good mechanical and electrical contact for applications such as in lithium ion secondary batteries.

An ultrasonic bonding head includes a vibrator unit, a holder, and a pressurizing shaft. The vibrator unit includes a press part formed at a tip of the vibrator unit in a longitudinal axis thereof and configured to press a bonding scheduled part to be bonded. The holder holds a base of the vibrator unit in a cantilever manner so that the tip is a free end. The pressurizing shaft is connected with the holder and transmits a force of pressing the press part against the bonding scheduled part so that the vibrator unit moves substantially perpendicularly to the longitudinal axis. The holder is provided with a restraint portion. The restraint portion contacts with the vibrator unit at a counterforce dispersion position located between a main hold position for holding the vibrator unit by the holder and the free end.

The invention provides a method for increasing the glass welding speed. The method comprises the following steps: controlling the overall plate temperature of glass within 60-80 DEG C; an area heating device being arranged at the ultrasonic soldering bit, moving along with the ultrasonic soldering bit and being aligned with an area to be welded; and the area heating device being used for heating the glass in the area to be welded before welding, so that the glass meets the temperature requirement of ultrasonic welding. According to the method for increasing the glass welding speed, the welding speed is increased on the premise of ensuring that the glass does not deform.

A method of manufacturing a smartcard may include providing a flexible smartcard circuit, forming conductive extension members on and extend away from the flexible circuit from a high melting point solder material, and laminating the flexible circuit to form a smartcard body. A cavity is then milled in the smartcard body to expose the ends of the extension members, and a contact pad is inserted into the cavity and electrically connected to extension members using a low melting temperature tin-bismuth solder using ultrasonically soldering, so as to avoid heat damage to the card body.

The invention relates to a positive electrode of a primary lithium-manganese battery. The positive electrode comprises a positive plate and a positive tab, wherein the positive tab is a composite band which is formed by compositing an aluminum band and a stainless steel band, and the aluminum band of the positive tab is soldered onto an aluminum net of the positive plate in a face-to-face manner by virtue of ultrasonic. The aluminum band is directly soldered onto the aluminum net of the positive plate by virtue of the ultrasonic, and the ultrasonic soldering belongs to the surface contact, so that the faulty soldering phenomenon is avoided, the soldering firmness is improved, meanwhile, multipoint soldering is not needed, the production efficiency is improved, and the labor intensity is alleviated.