Abstract: Maintenance of a flow tank is facilitated. A sub-module is provided adjacent to a main module. A board is introduced in the sub-module, and is heated by a heater that is at a heating position, is moved to the main module, solder is applied by a flow tank in parallel with insertion of a component by a component insertion device, and thereby the component is mounted. If a maintenance condition is established, introduction of boards is stopped, the heater is moved to a standby position, and the flow tank is moved to a maintenance position of the sub-module. Maintenance is performed on the flow tank and since the component insertion device is not present above the flow tank, it is possible to facilitate inspection, removal, and the like of the flow tank.

Abstract: Provided is a jet nozzle that varies a width of a flow of jetted molten solder. The jet nozzle contains a nozzle main body having a channel section at its part and a molten solder flow width varying member that varies a width of the upper opening end of the nozzle main body by a slide of the molten solder flow width varying member within the channel section of the nozzle main body to vary a width of the molten solder flow jetted from the upper opening end of the nozzle main body. The molten solder flow width varying member includes a molten solder flow width varying plate that varies the width of the molten solder flow, a rectangular rectifying piece that extends along a slide direction of the molten solder flow width varying member, and a sliding shaft that slides the rectifying piece.

Abstract: A process for closing an opening in a surface of a component, and components formed thereby. The process entails forming a channel in the component surface so that the channel at least partially surrounds an opening at the component surface. An alloy is then deposited in the channel to form a crack-free deposit in the channel. A step is then machined that intersects the opening and is at least partially formed in the deposit. The step defines a recess that is at least partially surrounded by a peripheral portion of the deposit and has a surface recessed into the component surface. A cap is placed in the recess and welded to the peripheral portion of the deposit to define a weld joint that completely closes the opening. The surface of the weld joint is then machined to form a machined surface that is substantially flush with the component surface.

Abstract: A method for contacting at least two metal electrodes, wherein the metal electrodes are located in a cavity of a basic body of sintered ceramic and frontal end faces of the metal electrodes. The metal electrodes are arranged essentially planparallel to an outer surface of the basic body. The method includes steps as follows: introducing a solder into at least one hole of the basic body, wherein the hole is so embodied that it leads to a rear portion of the metal electrode away from the frontal end face of the metal electrode wherein the solder can wet the rear portion of the metal electrode, wherein the metal electrodes are in their longitudinal direction shorter than the basic body, especially have only ? of the length of the basic body; introducing a cable into the hole at least until the cable extends into the solder; and heating the basic body with solder and cable above the solidification temperature of the solder.

Abstract: High Impact Toughness Alloy The invention provides an alloy, preferably a lead-free solder alloy, comprising: from 35 to 59% wt Bi; from 0 to 0.0 wt % Ag; from 0 to 1.0% wt Au; from 0 to 1.0% wt Cr; from 0 to 2.0% wt In; from 0 to 1.0% wt P; from 0 to 1.0% wt Sb; from 0 to 1.0% wt Sc; from 0 to 1.0% wt Y; from 0 to 1.0% wt Zn; from 0 to 1.0% wt rare earth elements; one or more of: 10 from greater than 0 to 1.0% wt Al; from 0.01 to 1.0% wt Ce; from greater than 0 to 1.0% wt Co; from greater than 0 to 0.0% wt Cu; from 0.001 to 1.0% wt Ge; from greater than 0 to 0.0% wt Mg; from greater than 0 to 1.0% wt Mn; from 0.01 to 1.0% wt Ni; and from greater than 0 to 1.0% wt Ti, and the 1 balance Sn, together with any unavoidable impurities.

Abstract: A structure including a circuit board including a plane and a pin-in-hole component; and a heat transfer device, where the heat transfer device is thermally connected to the plane at a leading edge of the circuit board, the heat transfer device transfers heat from a wave of molten solder to the plane.

Abstract: Disclosed herein a solder injection head including: a bump material storing part having a bump material stored therein; a discharging part having one side connected to the bump material storing part and discharging the bump material to the outside; a heating part formed at at least one side of the discharging part and heating the bump material passing through the discharging part; and a press-fitting part press-fitting the bump material discharged to the outside and injecting the bump material onto a substrate.

Abstract: A solder drawing member (402) is detachably attached on the outer side of a jet nozzle (303) that jets molten solder pumped from a solder tank (102) storing the molten solder. The solder drawing member (402) is made of a material having higher wettability to the molten solder than the surface material of the jet nozzle (303). Thus a force of separating the solder from a point to be soldered can be increased by a surface tension of the molten solder flowing on the solder drawing member (402), thereby reducing bridge phenomena and icicle phenomena.

Abstract: A process by which molten solder is purified in-situ, making the soldering process more efficient and yielding better results, particularly for lead-free soldering. Lead-free solder becomes practical for use since the temperature for reliable soldering is reduced. A layer of active additive is maintained on the surface of molten solder for scavenging metal oxide from the solder and assimilating metal oxide into a liquid layer. The active additive is an organic liquid having nucleophilic and/or electrophilic groups. As an example, a layer of dimer acid maintained on a wave soldering apparatus scavenges metal oxide from the bath, and assimilates dross that may form on the surface. Scavenging metal oxide cleanses the bath and lowers viscosity of the solder, and PC boards or the like soldered on the wave have reliable solder joints.

Abstract: Described herein is an apparatus and method for providing an inerting gas during the application of soldering to a work piece. In one aspect, there is provided an enclosure for providing an inerting gas into an atmosphere above a solder reservoir during soldering of a work piece comprising: a tube in fluid communication with an inerting gas source wherein the tube comprises one or more openings for the flow of the inerting gas therethrough, a base wherein the tube resides in therein and comprises an interior volume, a neck comprising an opening and an interior volume in fluid communication with the interior volume of the base, and a cap proximal to the opening wherein the inerting gas source travels through the tube into the interior volume and into the atmosphere through the opening defined by the neck and cap.

Abstract: A system includes a device of the surface-mounting type having an insulating package provided with a mounting surface and a contact pin exposed on the mounting surface. The device is attached to an insulating board including a gluing surface and an opposite surface. The process for manufacturing the system includes forming through holes a contact region on the gluing surface. The mounting surface is glued to the gluing surface with the contact pin aligned with the contact region. Wave soldering is performed to electrically join the device to the board by hitting the opposite surface with a wave of soldering paste to form, by capillary action with the soldering paste ascending in the through holes up to the overflow on the gluing surface, a conductive contact electrically connecting the contact pin of the electronic device through a solder connection to the contact region of the electronic board.

Abstract: To enable the molten solder to be partially spouted onto a component-mounting member in a stable state without decreasing the revolutions of a pump which is difficult to set a spouted amount of molten solder, even if a nozzle having a small spouting opening is used in a partial-jet-solder bath. As shown in FIG.

Abstract: A solder return apparatus for a wave solder machine that collects solder exiting a nozzle and returns the solder to a solder reservoir while limiting the degree to which the solder can splash onto electronic substrates (e.g., printed circuit boards), components of the wave solder machine, and/or the like. The apparatus includes a mounting section that may be placed over an upper surface of the nozzle and a collection section that collects the solder and returns the solder to the solder reservoir. The collection section includes a trough having an opening in a bottom wall of the trough and a flow control member that can adjust a quantity of solder exiting the trough as well as the velocity of the solder exiting the trough. One or more deflection plates can be mounted so as to extend from the trough into solder in the solder reservoir to further contain the solder and limit the degree to which splashing solder can reach unintended locations.

Abstract: Connections can be made to microwires comprising a conductor of a lower melting point metal (e.g., indium 290) in a sheath of higher melting point polymer (e.g., PETG) by placing a small diameter spring, slightly larger in inside diameter than the outer diameter of the microwire, and of a readily solderable material over the distal end of the microwire. The conductor of the microwire is then soldered to the distal end of the spring in any of several ways that result in a solid member at the distal end of the microwire. The flexible spring provides a flexible support for the microwire, so that as the microwire flexes in use, the spring provides a strain relief; that is, the proximal portion of the spring flexes along with the microwire, so that the microwire bends over some distance rather than at a single point.

Abstract: The present disclosure relates to methods of making solder balls having a uniform size. More particularly, the disclosure relates to improved solder ball formation processes that prevent or reduce bridging/merging of two or more solder balls during reflow. The processes of the instant disclosure are desirable because they do not require a sifting step to obtain uniformly-sized solder balls.

Abstract: A novel inert environment enclosure includes an object inlet where production objects enter the enclosure and an object outlet where the production objects exit. At least one of the object inlet and the object outlet includes both a top-side flow obstructer and a bottom-side flow obstructer for preventing air from entering the enclosure. In a particular embodiment, the top-side flow obstructer and the bottom-side flow obstructer each include a curtain constructed from a flexible fabric having a plurality of individual adjacent fingers. In another particular embodiment, the inert environment enclosure is a nitrogen hood that houses a wave soldering machine. A inert gas nozzle is mounted at or near the inlet and/or the outlet. The inert environment enclosure maintains a positive pressure with respect to the surrounding environment when production objects are passed through the enclosure.

Abstract: The invention relates to a device and method for selective soldering, including at least one nozzle and a soldering channel surrounded by a vertically moveable hood, which immerses in a soldering bath or which is sealed against a surface of the soldering bath. The hood includes a passage for each nozzle, at least one gas feeding device for providing protective and/or active gas underneath the hood, and flow plates which are attached to the hood to extend substantially downward in the direction of the soldering bath from the hood.

Abstract: To prevent clogging in a jet nozzle without using any inert gas and to allow reliability to be improved by filling a through hole of a printed circuit board with the molten solder. By flowing the molten solder 4 in the solder bath 2 from inside of the inner cylinder 15 to a nozzle cap 19, the inside of the nozzle cap 19 is filled with the molten solder 4, and the molten solder 4 filling the inside of the nozzle cap 19 is flown downward from between an inner cylinder 15 and an outer cylinder 16 without substantially flowing it to outside from an insert hole 19a. This enables the molten solder 4 to be prevented from oxidizing because the molten solder 4 is not exposed to the outside air. For this reason, it is possible to prevent clogging in the jet nozzle 3 without filling a part of nozzle outlet with any inert gas as in the conventional soldering apparatus.

Abstract: A plurality of through-substrate holes is formed in each of at least one substrate. Each through-substrate hole extends from a top surface of the at least one substrate to the bottom surface of the at least one substrate. The at least one substrate is held by a stationary chuck or a rotating chuck. Vacuum suction is provided to a set of through-substrate holes among the plurality of through-substrate holes through a vacuum manifold attached to the bottom surface of the at least one substrate. An injection mold solder head located above the top surface of the at least one substrate injects a solder material into the set of through-substrate holes to form a plurality of through-substrate solders that extend from the top surface to the bottom surface of the at least one substrate. The vacuum suction prevents formation of air bubbles or incomplete filling in the plurality of through-substrate holes.

Abstract: Described herein is an apparatus and method for providing an inerting gas during the application of soldering to a work piece. In one aspect, there is provided an apparatus that is placed atop of a solder reservoir and comprises a plurality of porous tubes that are in fluid communication with an inerting gas. In another aspect, there is provided a method for providing an inerting gas to a wave soldering apparatus comprising the steps of, among other things, placing an apparatus atop at least one edge of the solder reservoir wherein the apparatus comprises a plurality of tubes comprising one or more openings in fluid communication with an inerting gas source. In a further aspect, at least one of the tubes comprises a non-stick coating or is comprised of a porous non-stick material such as a sleeve.

Abstract: A method and a system for jetting droplets of viscous medium, such as solder paste, onto a substrate, such as an electronic circuit board. The volume of the droplets are adjusted by regulating the amount of viscous medium that is fed into a jetting nozzle for subsequent jetting of the viscous medium droplets therefrom. The exit velocity of the jetted droplets is adjusted or maintained substantially constant by regulating the velocity with which the viscous medium is impacted. Furthermore, the rate at which viscous medium is fed, for instance by a feed screw, into the nozzle is adjusted in order to regulate the feeding time required for feeding the viscous medium into the jetting nozzle, for instance in order to maintain a constant feeding time.

Abstract: The invention relates to a supply device for feeding a gas to a wave brazing or tinning machine, wherein said machine is capable of generating at least one soldering wave, comprising: a gas inlet channel, a set of N secondary channels immersed in the solder bath of the brazing or tinning machine, and an injection channel supplying at least one injection means for injecting the gas in the vicinity of said at least one wave, each secondary channel having its inlet end connected to the injection channel, characterized in that the number N of secondary channels is equal to or higher than 1, and in that the inner diameter d of the secondary channels and the gas flow rate Q0 in the inlet channel are selected so that the gas flow in the secondary channels is in a turbulent mode.

Abstract: The present disclosure relates to methods of making solder balls having a uniform size. More particularly, the disclosure relates to improved solder ball formation processes that prevent or reduce bridging/merging of two or more solder balls during reflow. The processes of the instant disclosure are desirable because they do not require a sifting step to obtain uniformly-sized solder balls.

Abstract: The present invention provides a flow soldering apparatus that can suppress the occurrence of soldering defects, even if VOC-free flux or low-VOC flux is applied to an electronic circuit substrate. In other words, the flow soldering apparatus according to the present invention includes: a water content sensor for measuring a residual water content of a surface of a substrate; and a monitoring device for judging whether soldering quality is satisfactory or not by using a residual water content value of the surface of the substrate acquired from the residual water content measured by the water content sensor, on the basis of a correlation between a residual water content value of a surface of a sample substrate and a residual water content value of through holes of the sample substrate, as acquired previously by using a plurality of substrate samples.

Abstract: To enable the molten solder to be partially spouted onto a component-mounting member in a stable state without decreasing the revolutions of a pump which is difficult to set a spouted amount of molten solder, even if a nozzle having a small spouting opening is used in a partial-jet-solder bath. As shown in FIG.

Abstract: A soldering machine for soldering components which are mounted on a circuit board contains a soldering module and comprises at least one soldering station which is mobile and exchangeably insertable in the soldering module. The soldering station and the soldering module are equipped with means for mutual alignment and with female or male plugs, which fit with one another and which terminate supply lines for goods. When inserting the soldering station in the soldering module said means align the soldering station in relation to the soldering module. Preferably, the soldering machine is composed of modules which are situated one behind another in the transport direction and are removably connected to one another. Each module comprises an own transport system.

Abstract: A jet soldering device of the present invention includes: a solder bath (11) containing melted solder; a jet nozzle (15) that includes an end face for ejecting the melted solder, a cutout (30) provided on the end face, and a recovery wall (32) provided on the end face; a solder feeding mechanism (13, 20, 21, 22) that feeds the melted solder contained in the solder bath (11) to the jet nozzle (15); a tank moving mechanism (23, 24, 25, 26) that moves the solder bath (11); a solder receiving wall (42) that surrounds the jet nozzle (15) with a predetermined clearance and is connected to the jet nozzle (15); and a rotating mechanism (44, 45, 46) that transmits a drive force from the outside of the solder receiving wall (42) to rotate the solder receiving wall (42) and the jet nozzle (15).

Abstract: The instant invention relates to a device for wave soldering workpieces, encompassing means for moving the workpiece, which is to be soldered, along a specific path across at least one solder wave generated above a solder reservoir, with a protective and/or active gas atmosphere of a first composition being located above the solder reservoir so as to exclude oxygen and with means for introducing the protective and/or active gas as well as an enclosure being provided, with the enclosure being configured in such a manner that it encloses at least the essential parts of a solder zone.

Abstract: A solder return apparatus for a wave solder machine that collects solder exiting a nozzle and returns the solder to a solder reservoir while limiting the degree to which the solder can splash onto electronic substrates (e.g., printed circuit boards), components of the wave solder machine, and/or the like. The apparatus includes a mounting section that may be placed over an upper surface of the nozzle and a collection section that collects the solder and returns the solder to the solder reservoir. The collection section includes a trough having an opening in a bottom wall of the trough and a flow control member that can adjust a quantity of solder exiting the trough as well as the velocity of the solder exiting the trough. One or more deflection plates can be mounted so as to extend from the trough into solder in the solder reservoir to further contain the solder and limit the degree to which splashing solder can reach unintended locations.

Abstract: A tin or solder alloy film is formed by ejecting molten tin liquid or molten solder alloy liquid in a jet state onto a copper surface of an electronic component. The overflowing molten tin or molten solder alloy liquid is transported to a stirrer. Then, cuprate and the like mixed in the overflowing molten tin or molten solder alloy liquid are taken in to the organic fatty acid solution by fiercely stirring and mixing the molten tin or molten solder alloy liquid in contact with a solution at a temperature of 180 to 350° C. containing 1 to 80 weight % of organic fatty acid having 12 to 20 carbon number that circulates in the stirrer to purify the overflowing molten tin or molten solder alloy liquid.

Abstract: In a conventional wave soldering bath, the bottom surface of a bath body in a position which is below the inlet of a duct underwent erosion by molten solder and had a hole formed therein, causing molten solder to be spilled out from the hole. The cause of erosion of the bottom surface of the bath body is a vortex (T) of molten solder formed below the duct inlet accompanying rotation of an impeller pump (10), and the vortex rubs the bottom surface of the bath body. In the present invention, a shielding member (14) is installed between the duct inlet (12) and the bottom surface (13) of the bath body such that the vortex is prevented from affecting the bottom surface.

Abstract: In a wave soldering tank using a conventional screw pump, pulsation sometimes occurred in which molten solder spouting from the discharge nozzle moved up and down. The cause of the occurrence of the pulsation in a screw pump was that the gap between the screw pump and the casing was wide, so there was reverse flow through the gap. It is conceivable to narrow the gap, but if the gap is made narrow, the screw pump ends up contacting the casing if the screw pump becomes eccentric. A wave soldering tank according to the present invention makes the diameter of the inlet in the bottom of the casing smaller than the diameter of the screw pump so that reverse flow does not take place even if the gap between the screw pump and the casing is wide. Flow is made more stable by providing outwardly flaring guide walls on the outlet of the casing.

Abstract: A flexible unitary mask has a plurality of through holes. A substrate has a plurality of wettable pads in recessed regions defining volumes. The through holes are aligned with the wettable pads. Molten solder is directly injected through the through holes of the flexible unitary mask into the volumes with the wettable pads, such that the through holes and the volumes with the wettable pads are filled with solder. The solder is allowed to solidify, forming a plurality of solder structures adhered to the wettable pads. The flexible unitary mask is peeled from the substrate after the solder has solidified.

Abstract: A tin or solder alloy film is formed by ejecting molten tin liquid or molten solder alloy liquid in a jet state onto a copper surface of an electronic component. The overflowing molten tin or molten solder alloy liquid is transported to a stirrer. Then, cuprate and the like mixed in the overflowing molten tin or molten solder alloy liquid are taken in to the organic fatty acid solution by fiercely stirring and mixing the molten tin or molten solder alloy liquid in contact with a solution at a temperature of 180 to 350° C. containing 1 to 80 weight % of organic fatty acid having 12 to 20 carbon number that circulates in the stirrer to purify the overflowing molten tin or molten solder alloy liquid.

Abstract: A plurality of through-substrate holes is formed in each of at least one substrate. Each through-substrate hole extends from a top surface of the at least one substrate to the bottom surface of the at least one substrate. The at least one substrate is held by a stationary chuck or a rotating chuck. Vacuum suction is provided to a set of through-substrate holes among the plurality of through-substrate holes through a vacuum manifold attached to the bottom surface of the at least one substrate. An injection mold solder head located above the top surface of the at least one substrate injects a solder material into the set of through-substrate holes to form a plurality of through-substrate solders that extend from the top surface to the bottom surface of the at least one substrate. The vacuum suction prevents formation of air bubbles or incomplete filling in the plurality of through-substrate holes.

Abstract: Methods and devices for placing a semiconductor wafer or other substrate in contact with solder are described. A wave soldering apparatus includes a solder bath, a nozzle for producing a solder wave, and a jig for orienting a substrate in a substantially vertical orientation and placing the substrate in contact with a cascading solder wave. In another wave soldering apparatus, a jig orients a semiconductor wafer in a substantially horizontal orientation in contact with the solder wave. Another soldering apparatus includes a tank comprising molten solder and a fixture configured to orient one or more semiconductor wafers in a substantially vertical orientation. Methods of placing semiconductor wafers or other substrates in contact with solder using the devices of the present invention are also disclosed.

Abstract: A wave soldering tank is provided on which it is easy to perform maintenance, which does not have fluctuation of the height of spouted solder, which does not damage the rotating shaft of a discharge pump, and which can be stably used for long periods. The wave soldering tank 1 has a tank body 1a which houses molten solder S, a discharge pump 5 which pumps molten solder S, a discharge nozzle 4 which spouts molten solder S which was sent to it by the discharge pump 5 upwards, a duct 2 having the discharge pump 5 installed at one of its ends and the discharge nozzle 4 installed at its other end, an oxidation preventing member 22 which has a prescribed size and which floats on the surface of the molten solder S, and an engaging means 13 which controls rotation of the oxidation preventing member 22 in a horizontal plane.

Abstract: A process by which molten solder is purified in-situ, making the soldering process more efficient and yielding better results, particularly for lead-free soldering. Lead-free solder becomes practical for use since the temperature for reliable soldering is reduced. A layer of active additive is maintained on the surface of molten solder for scavenging metal oxide from the solder and assimilating metal oxide into a liquid layer. The active additive is an organic liquid having nucleophilic and/or electrophilic groups. As an example, a layer of dimer acid maintained on a wave soldering apparatus scavenges metal oxide from the bath, and assimilates dross that may form on the surface. Scavenging metal oxide cleanses the bath and lowers viscosity of the solder, and PC boards or the like soldered on the wave have reliable solder joints.

Abstract: A dry-type high-voltage load system apparatus has a space-saving structure, which is resistant to chain breaking, arc discharge and vibration, and a method of preventing the chain breaking and the arc discharge for use with the system apparatus. The system apparatus includes a dry-type high-voltage load system circuit including a low-voltage bank formed of lower-capacity configuration banks which include three-phase resistor circuits which are low-voltage resistor circuit. A high-voltage bank includes lower-capacity configuration banks for a high-voltage resistor circuit formed of three-phase resistor circuits. The three-phase resistor circuits are connected to a high-voltage power generator in parallel and are in the form of a Y-connection of three resistor arrays so that an isolated and independent neutral point is unconnected to other neutral points. The three phase resistor circuits may also be in the form of a ?-connection.

Abstract: A lead-free solder alloy suitable for use in flow soldering of electronic components to printed wiring boards comprises 0.1-3 wt % of Cu, 0.001-0.1 wt % of P, optionally 0.001-0.1 wt % of Ge, and a balance of Sn. The solder alloy may further contain at least one of Ag and Sb in a total amount of at most 4 wt %, and/or at least one of Ni, Co, Fe, Mn, Cr, and Mo in a total amount of at most 0.5 wt % in order to strengthen the alloy, and/or at least one of Bi, In, and Zn in a total amount of at most 5 wt % in order to lower the melting point of the alloy.

Abstract: It has been observed that turbulent solder flow, particularly at the opening of a conventional flow well, correlates to a greater degree of Cu dissolution of the PTH barrels of a PCB, especially those that are aligned with the opening. A more laminar solder flow is created to more evenly distribute the solder flow and thus reduce the rate of Cu dissolution near the flow well opening, particularly during a PTH rework process. In one aspect, a flow well for a soldering machine is provided comprising a flow distribution element, wherein solder flowing into the flow well is distributed by the flow distribution element to provide a more laminar flow.

Abstract: In a conductive material supply apparatus that can connect a small slider electrode and a wiring electrode on a flexure in a miniaturized magnetic head, electrically conductive material is supplied, with the aid of flow of nitrogen gas that is pressurized to a first pressure, into the interior of a nozzle assembly that defines an interior space having a nozzle orifice through which the electrically conductive material can pass. After the electrically conductive material has been supplied, the flow of the nitrogen gas is stopped, and the interior space is temporarily brought into communication with the exterior space thereby decreasing the pressure in the interior space. Thereafter, nitrogen gas maintained at a second pressure that is designed to be lower than the first pressure is supplied to the interior space, whereby the electrically conductive material is ejected to the exterior from the nozzle orifice by the effect of the second pressure.

Abstract: A system and method for injection molding conductive bonding material into a plurality of cavities in a non-rectangular mold is disclosed. The method comprises aligning a fill head with a non-rectangular mold. The non-rectangular mold includes a plurality of cavities. The fill head is placed in substantial contact with the non-rectangular mold. Rotational motion is provided to at least one of the non-rectangular mold and the fill head while the fill head is in substantial contact with the non-rectangular mold. Conductive bonding material is forced out of the fill head toward the non-rectangular mold. The conductive bonding material is provided into at least one cavity of the plurality of cavities contemporaneous with the at least one cavity being in proximity to the fill head.

Abstract: A method for mounting a semiconductor chip onto a substrate comprises the steps of positioning a solder dispenser over the substrate and passing a length of solder wire through the solder dispenser to the substrate. The feeding of the wire to the substrate in a feeding direction is controlled with a wire feeder. The solder dispenser is moved relative to the substrate with a positioning device along at least one of two orthogonal axes that are substantially perpendicular to the feeding direction contemporaneously with feeding the solder wire to the surface of the substrate to dispense a line of molten solder onto the substrate. The semiconductor chip is then mounted onto the molten solder that has been dispensed onto the substrate.

Abstract: A method for the production of a soldered joint between at least two contact partners (22, 23) of a bonding arrangement (21), with a formed piece of solder material (27) being arranged at a distance to the bonding arrangement. The formed piece of solder material is at least partially melted off. The at least partially melted off formed piece of solder material being thrust against a bonding arrangement in such a way that both bonding partners are wetted in a bonding area to establish an electrically conductive bonding.

Abstract: The invention relates to a device and method for selective soldering, including at least one nozzle and a soldering channel surrounded by a vertically moveable hood, which immerses in a soldering bath or which is sealed against a surface of the soldering bath. The hood includes a passage for each nozzle, at least one gas feeding device for providing protective and/or active gas underneath the hood, and flow plates which are attached to the hood to extend substantially downward in the direction of the soldering bath from the hood.

Abstract: On a printed circuit or substrate board (10) designed to receive electronic components and having conductive tracks (12) printed on said board, one or more conductive bars (18) are provided that are mounted one after another between conductive link surfaces (140, 142, 144), the conductive bars (18) being electrically interconnected during a subsequent soldering process that is either a wave soldering process or a soldering process in a reflow oven.

Abstract: Oilfield tools, assemblies and methods of manufacturing same are described comprising a modified-soldered electronic component, wherein the modified-solder includes a high-melting metal matrix and from about 0.1 to about 20 weight percent, based on total weight of the modified solder, of a strength-reinforcing additive dispersed in the metal matrix, the additive comprising a polyhedral oligomeric silsesquioxane. Methods of using the oilfield tools and assemblies in oilfield operations are also described.

Abstract: In a wave soldering tank using a conventional screw pump, pulsation sometimes occurred in which molten solder spouting from the discharge nozzle moved up and down. The cause of the occurrence of the pulsation in a screw pump was that the gap between the screw pump and the casing was wide, so there was reverse flow through the gap. It is conceivable to narrow the gap, but if the gap is made narrow, the screw pump ends up contacting the casing if the screw pump becomes eccentric. A wave soldering tank according to the present invention makes the diameter of the inlet in the bottom of the casing smaller than the diameter of the screw pump so that reverse flow does not take place even if the gap between the screw pump and the casing is wide. Flow is made more stable by providing outwardly flaring guide walls on the outlet of the casing.

Abstract: A method for manufacturing a printed circuit board includes providing a board including a plurality of electrical traces, a first surface, and a second surface opposite the first surface. The method further includes providing at least one surface mount component having a plurality of electrical terminals. The method also includes applying an adhesive on the first surface of the board, and adhering the surface mounting component to the first surface. The method also includes wave soldering the surface mount component on the first surface to the board to encapsulate at least a portion of the electrical terminals of the surface mount component with a lead-free solder.