Abstract: A structure and method for retaining fastening element solder are introduced. The structure includes a fastening element which has a solderable surface and a fastening portion or a hole portion. One end of the hole portion or the fastening portion has a retaining portion. During a soldering heating process, solder flows into or enters the retaining portion to cool down and solidify. The solidified solder is retained in the retaining portion. The fastening element is firmly coupled to a first object because of coordination between the solderable surface and the retaining portion, and the second object is coupled to or removed from the fastening element because of coordination between the fastening portion and the hole portion, so as to couple together and separate the first and second objects repeatedly and quickly.

Abstract: An aluminum heat exchanger includes first and second plates with inner and outer surfaces, which are joined by brazing and define at least one fluid flow passage. The first and second plates each comprise a core layer of aluminum or an aluminum alloy having a melting temperature greater than an aluminum brazing temperature. The first plate also includes a first outer clad layer defining the outer surface of the first plate. The first outer clad layer is solderable to a metal layer of an object to be cooled and includes nickel or copper. A second outer clad layer is located between the first outer clad layer and the core layer and is roll bonded to at least the second outer clad layer. A manufacturing method includes brazing first and second plates, where the layers of the first plate are roll bonded and the first plate is optionally formed before brazing.

Abstract: An ultrasonic device comprising a chamber (10) provided with an inlet bore (11), which receives a melted pressurized polymer, an outlet bore (12) and a sonotrode housing bore (13) through which a distal portion (21) of an ultrasonic head (20) is inserted into the chamber, wherein the distal portion is separated from the rest of the ultrasonic head by a first nodal plane (PN1) wherein there is a first surface (S1) in contact with a complementary surface of a ring seal (30) that closes the chamber, and wherein the ultrasonic head includes a second nodal plane (PN2) away from and parallel to the first nodal plane (PN1) coinciding with or adjacent to a second surface (S2) wherein an anchoring device (40) presses the ultrasonic head against the ring seal ensuring a tight closure.

Abstract: A powder production method includes providing an elongated workpiece and repeatedly contacting an outer surface of the elongated workpiece with a reciprocating cutter according to a predetermined at least one frequency to produce a powder. The powder includes a plurality of particles, wherein at least 95% of the produced particles have a diameter or maximum dimension ranging from about 10 ?m to about 200 ?m. A system for producing powders having a plurality of particles including a cutter and at least one controller is also provided herein.

Abstract: The present disclosure provides methods for bonding a first downhole tool to a borehole tubular, which include applying solder particles, each particle having an outer shell and a core of liquid metal, to at least one of a surface of the first downhole tool or a surface of the borehole tubular. The methods may also include rupturing the shells of the solder particles to release the liquid metal cores. The methods may further include bonding the first downhole tool to the borehole tubular by allowing the released liquid metal core to solidify.

Abstract: A method for joining a first cable to a second cable that each include at least one electrically conductive inner conductor, an outer sheath which at least partially surrounds the at least one inner conductor, and an insulation material which is arranged at least partially between the at least one inner conductor and the outer sheath. The method includes: bringing an end of each cable together such that at least one inner conductor of the cables are opposite one another and a fusible conductor joining material having a lower melting point than the at least one inner conductor is present in between; and heating at least one of the cables from the outside such that the heat penetrates into an interior of the at least one heated cable so the fusible conductor joining material melts and electrically connects the at least one inner conductor of the cables to one another.

Abstract: The present invention relates to a reel-to-reel layer reflow method, which emits a uniformized laser beam, which can easily adjust the emission area, and which is for the purpose of improving productivity. An embodiment of the present invention provides a reel-to-reel layer reflow method comprising the steps of: a) transferring a substrate, which has been wound in a roll type, to one side while unwinding the same; b) forming a solder portion on the substrate; c) seating an emission target element on the solder portion and seating a non-emission target element on the substrate; d) surface-emitting a laser beam to the solder portion, on which the emission target element is seated, such that the emission target element is attached to the substrate; e) inspecting the substrate structure manufactured through said step d); and f) winding the substrate structure in a roll type.

Abstract: A method for producing an aluminum alloy clad material having a core material and a sacrificial anode material clad on at least one surface of the core material, wherein the core material comprises an aluminum alloy comprising 0.050 to 1.5 mass % (referred to as “%” below) Si, 0.050 to 2.0% Fe and 0.50 to 2.00% Mn; the sacrificial anode material includes an aluminum alloy containing 0.50 to 8.00% Zn, 0.05 to 1.50% Si and 0.050 to 2.00% Fe; the grain size of the sacrificial anode material is 60 ?m or more; and a ratio R1/R2 is 0.30 or less, wherein R1 (?m) is a grain size in a thickness direction and R2 (?m) is a grain size in a rolling direction in a cross section of the core material along the rolling direction; a production method thereof; and a heat exchanger using the clad.

Abstract: An electronic device and an electromagnetic shielding frame are provided. The electromagnetic shielding frame includes a ring-shaped portion and a plurality of soldering tabs that extend from the ring-shaped portion along a protruding direction. The soldering tabs are spaced apart from each other and are in a ring-shaped arrangement. At least one of the soldering tabs has a patterned slot layout so as to be defined as a patterned tab. A portion of the patterned slot layout of the patterned tab arranged away from the ring-shaped portion has a layout distance. The patterned slot layout is arranged along a first direction and a second direction. The first direction and the protruding direction have a first angle therebetween that is smaller than 90 degrees, and the second direction and the protruding direction have a second angle therebetween that is smaller than 90 degrees.

Abstract: An assembly that includes a first substrate, a second substrate, and a pair of bonding layers disposed between and bonded to the first and second substrates. The assembly further includes a solder layer disposed between the pair of bonding layers such that the solder layer is isolated from contacting the first substrate and the second substrate. The solder layer has a low melting temperature relative to a high melting temperature of the bonding layers. A coating is disposed over at least the pair of bonding layers and the solder layer such that the coating encapsulates the solder layer between the pair of bonding layers. The solder layer melts into a liquid form when the assembly operates at a temperature above the low melting temperature of the solder layer and the coating maintains the liquid form of the solder layer between the pair of bonding layers.

Abstract: A multilayer composite bonding material with a plurality of thermal stress compensation layers is provided. The plurality of thermal stress compensation layers include a metal core layer, a pair of particle layers extending across the metal core layer such that the metal core layer is sandwiched between the pair of particle layers, and a pair of metal outer layers extending across the pair of particle layers such that the pair of particle layers are sandwiched between the pair of metal outer layers. A pair of low melting point (LMP) bonding layers extend across the pair of metal outer layers. The metal core layer, the pair of particle layers, and the pair of metal outer layers each have a melting point above a transient liquid phase (TLP) sintering temperature, and the pair of LMP bonding layers each have a melting point below the TLP sintering temperature.

Abstract: A reliability cover that is disposed over at least one of an integrated circuit package and a Si die of the integrated circuit package is disclosed. The integrated circuit package is mountable to a printed circuit board via a plurality of solder balls. The reliability cover is configured to reduce a difference in a coefficient of thermal expansion between the integrated circuit package and the printed circuit board, and between the Si die and a substrate of the integrated circuit package by a threshold value.

Abstract: A multilayer composite bonding material for transient liquid phase bonding a semiconductor device to a metal substrate includes thermal stress compensation layers sandwiched between a pair of bonding layers. The thermal stress compensation layers may include a core layer with a first stiffness sandwiched between a pair of outer layers with a second stiffness that is different than the first stiffness such that a graded stiffness extends across a thickness of the thermal stress compensation layers. The thermal stress compensation layers have a melting point above a sintering temperature and the bonding layers have a melting point below the sintering temperature. The graded stiffness across the thickness of the thermal stress compensation layers compensates for thermal contraction mismatch between the semiconductor device and the metal substrate during cooling from the sintering temperature to ambient temperature.

Abstract: An electronic device and a manufacturing method thereof. As non-limiting examples, various aspects of this disclosure provide an electronic device having a top side pin array, for example which may be utilized for three-dimensional stacking, and a method for manufacturing such an electronic device.

Abstract: A conductive connecting member formed on a bonded face of an electrode terminal of a semiconductor or an electrode terminal of a circuit board, the conductive connecting member comprising a porous body formed in such manner that a conductive paste containing metal fine particles (P) having mean primary particle diameter from 10 to 500 nm and an organic solvent (S), or a conductive paste containing the metal fine particles (P) and an organic dispersion medium (D) comprising the organic solvent (S) and an organic binder (R) is heating-treated so as for the metal fine particles (P) to be bonded, the porous body being formed by bonded metal fine particles (P) having mean primary particle diameter from 10 to 500 nm, a porosity thereof being from 5 to 35 volume %, and mean pore diameter being from 1 to 200 nm.

Abstract: Produced is a metal ball which suppresses an emitted ? dose. Contained are the steps of melting a pure metal by heating the pure metal at a temperature which is higher than a boiling point of an impurity to be removed, higher than a melting point of the pure metal, and lower than a boiling point of the pure metal, the pure metal containing a U content of 5 ppb or less, a Th content of 5 ppb or less, purity of 99.9% or more and 99.995% or less, and a Pb or Bi content or a total content of Pb and Bi of 1 ppm or more, and the pure metal having the boiling point higher than the boiling point at atmospheric pressure of the impurity to be removed; and sphering the molten pure metal in a ball.

Abstract: A solder pad includes a surface. A tin layer is arranged on the surface. At least one out of a bismuth layer, an antimony layer and a nickel layer is arranged on the tin layer.

Abstract: Providing the conductive paste for the material forming the conductive connecting member without disproportionately located holes (gaps), coarse voids, and cracks, which improves thermal cycle and is excellent in crack resistance and bonding strength.

Abstract: An adaptive interposer is provided to be operably disposable between first and second solder materials of first and second electronic devices, respectively. The adaptive interposer includes a plate element formed to define cavities and third solder material disposable in the cavities to be electrically communicative with the first and second solder materials. The third solder material is more compliant and has a higher melting temperature than at least the second solder materials.

Abstract: A circuit structure is provided, which includes a plurality of conductive posts, and a plurality of first and second conductive pads formed on two opposite end surfaces of the conductive posts, respectively. A length of each of the first conductive pads is greater than a width of the first conductive pad so as to reduce an occupation area of the first conductive pad along the width and increase a distance between adjacent first conductive pads, thereby increasing the wiring density and meeting the wiring demand.

Abstract: A solder pre-form for soldering a coaxial cable to a connector body is provided with a plurality of flux grooves on a cable side and a connector side. The solder pre-form may also have a plurality of holes between the cable and connector sides. In a method of use, flux is applied to the flux grooves and the solder pre-form applied to encircle the outer conductor which is then inserted into the connector body and the solder pre-form melted to complete the solder interconnection. Where holes are present, flux may be applied to the connector side, passing through the holes also to the cable side.

Abstract: A light emitting device includes an epitaxial region, an insulating layer on the epitaxial region, a bond pad on the insulating layer, and a crack reducing feature in the insulating layer. The crack reducing feature is configured to reduce the propagation of cracks in the insulating layer to an outside surface of the insulating layer. Related methods are also disclosed.

Abstract: An electroconductive bonding material which has a high bonding strength to an inorganic nonmetal such as glass or a ceramic and which has excellent reliability in that it does not undergo peeling even when exposed to a high temperature has an alloy composition which comprises, in mass %, Zn: 0.1-15%, In: 2-16%, Sb: greater than 0% to at most 2%, optionally one or both of Ag: at most 2% and Cu: at most 1%, optionally at least one element selected from the group consisting of Ba, Ti, and Ca in a total amount of 0.01-0.15%, and a remainder of Sn. This electroconductive bonding material peels off when it is heated to at least its melting point and can be reused.

Abstract: Methods of forming a microelectronic packaging structure and associated structures formed thereby are described. Those methods and structures may include forming an opening in a dielectric material of a package substrate, and then plating a conductive interconnect structure in the opening utilizing a plating process. The plating process may comprises a conductive metal and a dopant comprising between about 0.05 and 10 percent weight, wherein the dopant comprises at least one of magnesium, zirconium and zinc.

Abstract: A solder piece that has a rectangular parallelepiped shape formed by a punching process. Any one of the four surfaces of the rectangular parallelepiped other than the surface on which the shear droop portion generated by the punching process is formed and a surface opposite to the surface on which the shear droop portion is formed is a vacuum pickup surface. Each vacuum pickup surface is a sheared surface and extends along a longitudinal direction of the rectangular parallelepiped solder piece. The solder piece may be located in an open cavity in a supply tape with one of only the four vacuum pickup surfaces exposed to be available for vacuum pickup.

Abstract: A method of making a microelectronic assembly can include molding a dielectric material around at least two conductive elements which project above a height of a substrate having a microelectronic element mounted thereon, so that remote surfaces of the conductive elements remain accessible and exposed within openings extending from an exterior surface of the molded dielectric material. The remote surfaces can be disposed at heights from said surface of said substrate which are lower or higher than a height of the exterior surface of the molded dielectric material from the substrate surface. The conductive elements can be arranged to simultaneously carry first and second different electric potentials: e.g., power, ground or signal potentials.

Abstract: The present invention provides a eutectic solder structure for a chip including a substrate and a solder structure on the substrate. The solder structure includes an alternate lamination of a plurality of first metal layers and a plurality of second metal layers, wherein each second metal layer has a continuous region and a plurality of openings and the melting point of the plurality of second metal layers is higher than that of the plurality of first metal layers. The eutectic solder structure for a chip also includes a chip on the solder structure, wherein the chip is bonded to the substrate by a eutectic reaction of the solder structure.

Abstract: The present invention relates to a method of soldering an electronic component (3) to a substrate (1) with high accuracy using transient liquid phase soldering. The component (3) is exactly positioned above the substrate (1) with a handling tool, placed in the melted solder (2) and pressed against the substrate (1). The component (3) is then released and the solder (2) allowed solidifying. Due to the use of a solder (2) having a sufficiently high amount of a second metal or metal alloy of a higher melting point which only partly dissolves in the melted first metal or metal alloy of a lower melting point, a solid framework forms during the liquid phase soldering which inhibits a lateral movement of the placed component (3) during soldering. Since the positioning of the component (3) is made using exact reference features on the substrate (1), the whole soldering process results in a highly accurate lateral position of the soldered component.

Abstract: The present invention provides a high-temperature lead-free solder alloy which has no variation in strength of the soldered portion and has an excellent balance between strength and soldering properties, and a method for producing the alloy. The present invention relates to a lead-free jointing material made of an alloy of two elements A and B selected from elements other than Pb, wherein the element A has a melting point higher than a melting point of the element B, wherein the alloy is an alloy which has a room-temperature stable phase composed of the element B and a room-temperature stable phase AmBn composed of the elements A and B (provided that m and n are specific numerals in accordance with an alloy constituting a stable phase at room temperature) and satisfies AxB1-x (provided that 0<x<m(m+n)), and wherein the element A is supersaturatedly dissolved in the room-temperature stable phase composed of the element B.

Abstract: A solder piece that has a rectangular parallelepiped shape formed by a punching process. Any one of the four surfaces of the rectangular parallelepiped other than the surface on which the shear droop portion generated by the punching process is formed and a surface opposite to the surface on which the shear droop portion is formed is a vacuum pickup surface. Each vacuum pickup surface is a sheared surface and extends along a longitudinal direction of the rectangular parallelepiped solder piece. The solder piece may be located in an open cavity in a supply tape with one of only the four vacuum pickup surfaces exposed to be available for vacuum pickup.

Abstract: A solder joint manufactured of an alloy essentially composed of 0.01-7.6 wt % Cu, 0.001-6 wt % Ni, and the remaining of Sn. Each of Cu and Ni has a maximum concentration range. The lower limit of the range of Ni is 0.01 wt % and preferably 0.03 wt %. The upper limit of the range of Ni is 0.3 wt % and preferably 0.1 wt %. The lower limit of the range of Cu is 0.1 wt % and preferably 0.2 wt %. The upper limit of the range of Cu is 7 wt % and preferably 0.92 wt %. The invention includes the solder joint essentially having these compositions.

Abstract: A solder piece that has a rectangular parallelepiped shape formed by a punching process. Any one of the four surfaces of the rectangular parallelepiped other than the surface on which the shear droop portion generated by the punching process is formed and a surface opposite to the surface on which the shear droop portion is formed is sucked surface.

Abstract: A Ni—Fe-based alloy brazing filler material is provided comprising, in mass %, Fe: 21 to 40%; Cr: 10 to 30%; P: 7 to 11%; B: 0 to 5%; Si: 0 to 4.5%; V: 0 to 5%; Co: 0 to 5%; Mo: 0 to 5%; the balance being Ni and unavoidable impurities, wherein the mass ratio of Fe to P (Fe/P) is in a range of 2.6 to 5. The present invention provides a Ni—Fe-based alloy brazing filler material having a low melting temperature and a superior corrosion resistance and comprising raw materials that are relatively easily available, for use in manufacture of stainless-steel heat exchangers or the like.

Abstract: A first set of electrically conductive cladding is disposed on an inner section of one external side of a package substrate. The first set electrically conductive cladding is fabricated with a first solder compound. A second set of electrically conductive cladding is disposed on an outer section of the one external side of the substrate. The second set of electrically conductive cladding consists of a second solder compound. The outer section can be farther away from a center of the one external side of the substrate than the inner section. During a reflow process, the first and second solder compounds are configured to become completely molten when heated and the first solder compound solidifies at a higher temperature during cool down than the second solder compound.

Abstract: A sintering method is provided which allows components to be joined to each other in a stable way, wherein the processing temperature is less than 200° C. and stable contact points are produced, which have low porosity and also high electrical and thermal conductivity. The method for joining components includes (a) providing a sandwich arrangement having at least (a1) one component 1, (a2) one component 2, and (a3) a metal paste located between component 1 and component 2, and (b) sintering the sandwich arrangement. The metal paste contains (A) 75-90 weight percent of at least one metal present in the form of particles having a coating containing at least one organic compound, (B) 0-12 weight percent of at least one metal precursor, (C) 6-20 weight percent of at least one solvent, and (D) 0.1-15 weight percent of at least one sintering agent selected from the group comprising (i) organic peroxides, (ii) inorganic peroxides, and (iii) inorganic acids.

Abstract: A sintering method allows components to be joined to each other in a stable way at a processing temperature of less than 200° C., producing stable contact points having low porosity and high electrical and thermal conductivity. The method includes (a) providing a sandwich arrangement having at least a first component, a second component, and a metal paste located between the first and second components, and (b) sintering the sandwich arrangement. The metal paste includes (A) 75-90 wt. % of at least one metal present in the form of particles having an organic compound-containing coating, (B) 0-12wt % of at least one metal precursor, (C) 6-20wt % of at least one solvent, and (D) 0.1-15 wt % of at least one sintering agent selected from (i) salts of C1-C4 organic acids, (ii) esters of C1-C4 organic acids, and (iii) carbonyl complexes.

Abstract: A cap assembly for optical communications comprising a housing that includes a front side perpendicular from a bottom side, opposing parallel first and second sides perpendicular from the bottom side, and a back side disposed perpendicularly between the first side and the second side offset from respective ends of the first side and the second side opposite the front side. The back side includes an opening there-through and a three-sided ledge formed along an interior of the first side leg, an exterior of the back side, and an interior of the second side leg. The cap assembly further includes a window configured to contact the three-sided ledge of the back side, the glass panel covering the opening there-through and attached to the assembly via a solder pre-form.

Abstract: A method is provided for connecting at least two components, in which a sintering preform is used. This preform includes a carrier having a surface that has at least one structuring element containing hardened paste, wherein the hardened paste contains: (a) metal particles having a coating that contains at least one organic compound; and (b) at least one sintering aid selected from the group consisting of (b1) organic peroxides, (b2) inorganic peroxides, (b3) inorganic acids, (b4) salts of organic acids, wherein the organic acids have 1-4 carbon atoms, (b5) esters of organic acids, wherein the organic acids have 1-4 carbon atoms, and (b6) carbonyl complexes. The surface of the carrier having the hardened paste is not reactive to the constituents of the paste.

Abstract: A method of bonding an electrical component to a substrate includes applying solder paste on to a substrate. Solder preform has an aperture is formed therethrough and is then urged into contact with the solder paste, such that solder paste is urged through the aperture. An electrical component is then urged into contact with the solder preform and into contact with the solder paste that has been urged through the aperture, thereby bonding the electrical component, the solder preform, and the substrate together to define a reflow subassembly.

Abstract: In accordance with one or more aspects, a method of reducing void formation in a solder joint may comprise applying a solder paste deposit to a substrate, placing a solder preform in the solder paste deposit, disposing a device on the solder preform and the solder paste deposit, and processing the solder paste deposit and the solder preform to form the solder joint between the device and the substrate. In some aspects, the substrate is a printed circuit board and the device is an integrated circuit package.

Abstract: Embodiments of the present disclosure are directed towards multi-solder techniques and configurations for integrated circuit (IC) package assembly. In one embodiment, a method includes depositing a plurality of solder balls on a plurality of pads of a package substrate, the plurality of solder balls corresponding with the plurality of pads and performing a solder reflow process to form a solder joint between the plurality of solder balls and the plurality of pads. Individual solder balls of the plurality of solder balls include a first solder material and a second solder material, the first solder material having a liquidus temperature that is greater than a peak temperature of the solder reflow process and the second solder material having a liquidus temperature that is less than the peak temperature of the solder reflow process. Other embodiments may be described and/or claimed.

Abstract: Embodiments include but are not limited to apparatuses and systems including a die or a preform including at least one groove configured to extend from at least one via of the die to an edge of the die. Other embodiments may be described and claimed.

Abstract: A brazing alloy is provided in the form of a wire, rod or preform, and is made of, in weight percent: 3-7.5% P, 0.1-1.9% Zn, 0-74.7% Ag, 0-80% Au, 0-10% Sn, 0-5% Ni, 0-3% each of Si, Mn, Li, and Ge, and the balance copper in an amount of at least 21.7%. In additional embodiments, Zn may be present in an amount of 0.6-1.9%. A method of torch brazing is also provided. The method includes forming the alloy into a wire or rod, placing the tip of the wire or rod in contact with a surface of a joint, heating the joint surface using a torch flame, and contacting the tip of the wire or rod to the heated joint surface to melt and flow the alloy onto the joint surface and into the joint under capillary action.

Abstract: A solder composition comprising a blend of a first powder component and a second powder component, wherein the first powder component is a first solder alloy and the second powder component is a second solder alloy or a metal.

Abstract: Disclosed is a metal core solder ball having improved heat conductivity, including a metal core having a diameter of 40˜600 ?m, a first plating layer formed on the outer surface of the metal core, and a second plating layer formed on the outer surface of the first plating layer.

Abstract: A brazing sheet material including a core alloy layer bonded on at least one side with an aluminum brazing clad layer or layers forming a filler material of a 4000-series aluminum alloy. The core layer is made from an aluminum alloy having (in wt. %): Mg 1.0 to 3.0, Mn 0 to 1.8, Cu 0 to 0.8, Si 0 to 0.7, Fe 0 to 0.7, optionally one or more elements selected from the group (Zr, Cr, Hf, T), Zn 0 to 0.5, impurities and aluminum. The filler material forms a 4000-series aluminum alloy further including one or more wetting elements selected from Bi 0.03-0.5, Pb 0.03-0.5, Sb 0.03-0.5, Li 0.03-0.5, Se 0.03-0.5, Y 0.03-0.05, Th 0.03-0.05, wherein the sum of these elements being 0.5% or less.

Abstract: The invention relates to a method for applying soft solder to a mounting surface of a component, wherein a connecting means comprising a carrier layer and a soft solder layer formed by physical vapor deposition on the carrier layer is brought into mechanical contact between the soft solder layer and the mounting surface, such that a first bond strength between the soft solder layer and the mounting surface is greater than a second bond strength between the soft solder layer and the carrier layer. The connecting means is subsequently removed from the component so that the carrier layer releases from the soft solder layer in the area of the mounting surface and thus soft solder remains only at the mounting surface.

Abstract: A brazing ring with integrated fluxing product and methods for production thereof is described. The brazing ring has a c-shaped body with a plurality of channels extending the thickness of the ring and disposed about the circumference thereof. The channels are separated by radially extending flanges with enlarged distal ends that extend into the channels. The enlarged ends at least partially enclose the channels to aid in retention of a fluxing product disposed in therein. The c-shape may enable flexure of the ring for installation on a pipe or fitting and a friction fit to maintain an installed position. The brazing ring is formed by extruding a filler material to form a tube with the desired profile and compressing the fluxing product into the channels of the profile. The tube is subsequently sectioned perpendicularly to its length to produce a plurality of the brazing rings.

Abstract: Embodiments of the present disclosure are directed towards multi-solder techniques and configurations for integrated circuit (IC) package assembly. In one embodiment, a method includes depositing a plurality of solder balls on a plurality of pads of a package substrate, the plurality of solder balls corresponding with the plurality of pads and performing a solder reflow process to form a solder joint between the plurality of solder balls and the plurality of pads. Individual solder balls of the plurality of solder balls include a first solder material and a second solder material, the first solder material having a liquidus temperature that is greater than a peak temperature of the solder reflow process and the second solder material having a liquidus temperature that is less than the peak temperature of the solder reflow process. Other embodiments may be described and/or claimed.

Abstract: A composition for welding or brazing aluminum comprises silicon (Si) and magnesium (Mg) along with aluminum in an alloy suitable for use in welding and brazing. The Si content may vary between approximately 4.7 and 10.9 wt %, and the Mg content may vary between approximately 0.15 wt % and 0.50 wt %. The alloy is well suited for operations in which little or no dilution from the base metal affects the Si and/or Mg content of the filler metal. The Si content promotes fluidity and avoids stress concentrations and cracking. The Mg content provides enhanced strength. Resulting joints may have a strength at least equal to that of the base metal with little or no dilution (e.g., draw of Mg). The joints may be both heat treated and artificially aged or naturally aged.