Abstract: A heat exchanger that includes a microchannel tube having a plurality of straight sections interconnected by a plurality of bent sections; a plurality of accordion-style fins located between adjacent straight sections of the microchannel tube; and a plurality of brackets having a plurality of slots formed therein that are each configured for receipt of a respective straight section of the microchannel tube, wherein the plurality of brackets are configured to compress the accordion-style fins into direct engagement with the adjacent straight sections of microchannel tube, and wherein at least one of the accordion-style fins and the microchannel tube includes a mating feature that prevents lateral movement of the accordion-style fin relative to the adjacent straight sections of the microchannel tube.

Abstract: Full-automatic microelectronic printer comprising a printing platform, a control component, a feeding component, a camera component, a machine vision device, an ink droplet observation device, and a CAD/CAM system. The printing platform comprises a four-axis linkage system, a printing worktable, a base, a protective housing, an automatic ink cartridge turning device, and an automatic cleaning device; the feeding component comprises a switching control device, an ink cartridge, and an auxiliary processing component; the control component comprises a core control integrated circuit board, a plurality of drive control circuit boards, and a control module interface. The feeding component switches the ink cartridges and the auxiliary processing components to the printing platform in response to the control component which drives the ink cartridges and auxiliary processing components to print, and the protective housing removes fine particles and gas odors.

Abstract: A beam structure includes a lower cover plate, an upper cover plate and two side web plates jointed between the upper cover plate and the lower cover plate; wherein the two side web plates are arranged perpendicularly to the upper cover plate and the lower cover plate, respectively, to form a hollow box-shaped structure; rib plates protruding outwardly with a plurality of plug heads are welded within the box-shaped structure; the plug heads are respectively plugged in the upper cover plate, the two side web plates and the lower cover plate, and each plugging joint is fixed by laser-MAG hybrid welding from outside of the box-shaped structure. The method includes: assembling two side web plates, rib plates and a lower cover plate on an upper cover plate to form a box-shaped structure; and welding each of joints from outside of the box-shaped structure by laser-MAG hybrid welding.

Abstract: A method for producing a composite material comprising a planar base material to which an additional layer is applied on one side or both sides via a solder layer, characterized by: providing the base material, wherein the base material has a first surface on at least one side; providing the additional layer and arranging the solder layer between a second surface of the additional layer and the first surface such that when the additional layer is deposited on the first surface, the first surface of the base material is covered by the solder layer in a planar manner; wherein a thickness of the solder layer between the base material and the additional layer is smaller than 12 ?m; heating the base material and the additional layer on the first surface to at least partially melt the solder layer; and connecting the base material to the at least one additional layer.

Abstract: The invention relates to a device and a corresponding method for manufacturing brush seals with obliquely positioned bristles. The method comprises the following steps: As the first step, a metal filament or wire (50) comprising a material for bristles is wound over two wire cores (42, 46) disposed at a distance from and running parallel to one another, to form a tightly packed metal filament or wire package (48). As the next step, the metal filament or wire package (48) is fastened to at least one wire core (42, 46). Then the region around at least one of the two wire cores (42, 46) is locally heated. Subsequently, at least one of the two wire cores (42, 46) is displaced.

Abstract: A turbo machine is provided. The turbo machine comprises a turbo stator having a shroud, a turbo rotor having an impeller within the shroud, a brush seal between the impeller and the shroud, and at least one vane extending from the shroud toward the impeller upstream of the brush seal.

Abstract: An electrically conductive lead is formed using a bonding tool. After bonding the wire to a metal surface and extending a length of the wire beyond the bonding tool, the wire is clamped. Movement of the bonding tool imparts a kink to the wire at a location where the wire is fully separated from any metal element other than the bonding tool. A forming element, e.g., an edge or a blade skirt provided at an exterior surface of the bonding tool can help kink the wire. Tensioning the wire using the bonding tool causes the wire to break and define an end. The lead then extends from the metal surface to the end.

Abstract: An electrically conductive lead is formed using a bonding tool. After bonding the wire to a metal surface and extending a length of the wire beyond the bonding tool, the wire is clamped. Movement of the bonding tool imparts a kink to the wire at a location where the wire is fully separated from any metal element other than the bonding tool. A forming element, e.g., an edge or a blade skirt provided at an exterior surface of the bonding tool can help kink the wire. Twisting the wire while tensioning the wire using the bonding tool can cause the wire to break and define an end. The lead then extends from the metal surface to the end, and may exhibits a sign of the torsional force applied thereto.

Abstract: A method of depositing a multi-layer cladding (40) of superalloy material and an apparatus so formed. A first layer of material (20) is deposited on a substrate (22) such as by laser cladding of superalloy powder (54). The deposited material includes a directionally solidified region (24) and a topmost equiaxed region (26). The topmost region is removed such as by grinding to expose a flat surface (28) of directionally solidified material. A second layer of material (32) deposited onto the exposed flat surface will again have a directionally solidified region (34) and a topmost equiaxed region (36). The process is repeated until a desired thickness of cladding material is achieved, the multi-layer cladding having no equiaxed material between its layers throughout its thickness.

Abstract: Aspects of the disclosure are directed to a bonding of a first skin and a second skin to a core material, coupling a sheet to the first skin to form with the first skin an enclosure containing the second skin and the core material, exposing the first skin, the second skin, and the core material to heat, and based on the exposition of heat, applying pressure via the enclosure to the first skin to cause the first skin to deform and expand to a shape of a die.

Abstract: Methods of screening a polycrystalline diamond element for suitability for electrical discharge machining (“EDM”). The method includes providing a PCD element including a plurality of bonded diamond grains, determining at least one characteristic of the PCD table correlated to electrical conductivity of the PCD element, and EDM the PCD element if the value of the at least one characteristic correlates to an electrical conductivity above a threshold value.

Abstract: A visually seamless method of joining a first piece of metal and a second piece of metal is described. The first piece of metal is placed in contact with an edge of the second piece of metal. In some embodiments, the edge includes a sacrificial lip. The first piece of metal forming a junction area with the edge of the second piece of metal, applying a forging force to the first piece of metal, the forging force having an effect of creating an extremely tight fit up between the first and the second pieces of metal, welding the first and the second pieces to form an assembly and forming a cosmetically enhancing protective layer on the surface of the assembly, the protective layer obscuring any visible artifacts on the surface of the assembly, the obscured visible artifacts including any discoloration or discontinuity created by the laser welding.

Abstract: A method of construction of a tungsten carbide/TSP insert for hard facing a wear surface comprises the steps of forming a tungsten carbide body (12) in a mold. After the molding step, a channel section slot (24) or pocket (24?) is created in the body before it has hardened substantially. The body is then heat-treated to harden it. A TSP body (32) is fitted in the slot/pocket (24/24?) so that it is a close sliding fit between the sides (18) of the slot, and is of the same depth as the slot. The TSP is (preferably) brazed into the slot. The insert has pips (30) on its edges (18) to facilitate welding to a substrate prior to a final brazing step.

Abstract: The present invention relates to dispersion strengthened platinum-base alloys, and more particularly to a method for welding of these alloys and is based on the object of providing an improved process for connecting oxide-dispersed precious metal sheets and a device for carrying out this process.

Abstract: A method for manufacturing a spiral groove metal pipe with a symmetrical structure comprises the steps of: supplying a metal strip successively; forming spiral grooves on the upper surface of the metal strip supplied at the metal strip supplying step in which the spiral grooves are repeatedly and symmetrically formed as the same pattern from side to side with the middle as the center with a shape of ‘’ symmetrically; forming a pipe in which its inner surface has spiral grooves formed at the spiral groove forming step and its outer surface has a smooth surface; welding the metal strip at the pipe forming step in such a way that opposite edges of the metal strip meet each other; and removing welding beads produced in the inner and outer surfaces of the metal strip by the welding step.

Abstract: A method of making a diffusion bonded sputter target assembly is provided. A target blank comprising a first metal or alloy has a first surface defining a sputtering surface and a second surface. A second metal or alloy is placed around the target blank. A backing plate is provided adjacent the second metal or alloy that is positioned alongside of the second target surface. This assembly is then diffusion bonded, and a portion of the second metal overlying the sputtering surface of the target is removed to expose the target sputtering surface. W target or W alloy target/Ti or Ti alloy backing plate assemblies are provided with an Al inter-layer positioned intermediate the W or W alloy target and backing plate. The assembly has a bond strength exceeding 50 MPa.

Abstract: A circumferentially extending weld, utilized to join the side wall and the end plate of a fluid filter together, is disposed at a terminus of at least one of the side wall and an upstanding flange of an end plate. The circumferentially extending weld may take various forms, and, for example, can be provided at adjoining axially facing ends of the upstanding flange and the side wall, between a terminal end of the side wall and a circumferentially extending inner surface of the upstanding flange, or between a terminal end of the side wall and a circumferentially extending outer surface of the upstanding flange.

Abstract: A thin conductive layer which is to form a conductor pattern (18) is prepared, a mask layer (3) is formed on the conductive layer except a plurality of actual connection spots and at least one dummy connection spot on the conductive layer, actual solder pads (6) and a dummy solder pad (7) are formed, with use of solder, on the actual connection spots and the dummy connection spot, respectively, where the conductive layer is exposed, connection terminals (9) of an electric or electronic component (8) are connected to the actual solder pads (6), an insulating base (16) of resin is formed which is laminated directly on or indirectly via the mask layer (3) on the conductive layer and in which the component (8) is embedded, and part of the conductive layer is removed by using the dummy solder pad (7) as a reference, to form the conductor pattern (18).

Abstract: A method is taught for creating a hollow sphere that is created by joining two cylinders together that have a semispherical hollow formed in the ends being joined together, wherein a metallic reinforcing disk is inserted at an interface between the two ends of the cylinders, wherein the two cylinders and reinforcing disk are joined using friction stir welding to create an inner sphere from the two hemispherical hollows that is bisected by the metallic reinforcing disk, and wherein the joined cylinders and reinforcing disk are machined to thereby create an outer spherical surface that is centered around the inner sphere.

Abstract: This invention relates to a method producing a common rail excellent in fatigue strength from an inexpensive steel which uses as the material of the common rail a steel for high-strength liquid phase diffusion bonding having good toughness and fatigue strength, which steel contains, in mass %, C: 0.01 to 0.3%, Si: 0.01 to 0.5%, Mn: 0.01 to 3.0%, Cr: 1.0 to 12.0% and Mo: 0.1 to 2.0%, further contains, in mass %, V: 0.01 to 1.0%, B: 0.0003 to 0.01%, Ti: 0.01 to 0.05% and N: 0.001 to 0.01%, has P content limited to 0.03% or less, S content to 0.01% or less and O content to 0.01% or less, further has total content of grain boundary segregated embrittling elements As, Sn, Sb, Pb and Zn limited to 0.015% or less, and a balance of unavoidable impurities and Fe.

Abstract: Embodiments of golf club face plates with internal cell lattices are presented herein. Other examples and related methods are also disclosed herein.

Abstract: A method is taught for creating a hollow sphere that is created by joining two cylinders together that have a semispherical hollow formed in the ends being joined together, wherein a metallic reinforcing disk is inserted at an interface between the two ends of the cylinders, wherein the two cylinders and reinforcing disk are joined using friction stir welding to create an inner sphere from the two hemispherical hollows that is bisected by the metallic reinforcing disk, and wherein the joined cylinders and reinforcing disk are machined to thereby create an outer spherical surface that is centered around the inner sphere.

Abstract: A manufacturing method of a circuit substrate includes the following steps. The peripheries of two metal layers are bonded to form a sealed area. Two insulating layers are formed on the two metal layers. Two including upper and bottom conductive layers are formed on the two insulating layers. Then, the two insulating layers and the two conductive layers are laminated so that the two metal layers bonded to each other are embedded between the two insulating layers. A part of the two insulating layers and a part of the two conductive layers are removed to form a plurality of blind holes exposing the two metal layers. A conductive material is formed in the blind holes and on the remained two conductive layers. The sealed area of the two metal layers is separated to form two separated circuit substrates.

Abstract: A printed circuit board structure is coated with an encapsulant within which microfluidic channels have been formed. The microfluidic channels are formed by soldering fluidic connections to metal traces on a surface of the printed circuit board structure prior to encapsulation. The metal traces are removed by etching after encapsulation to form microchannels within the encapsulant.

Abstract: A procedure for incorporating particles to a predetermined depth in a body to develop a composite surface layer using friction stir processing is described. The process comprises; preparing the surface of the body; applying particulate matter to the prepared surface; selecting a friction stir tool with a pin length substantially equal to the desired composite layer thickness; using a friction stir process to frictionally heat, stir and intermix the particulate matter with the matrix of the article; and traversing the friction stir tool across the body.

Abstract: A method for forming a reservoir for holding ink in an ink tank for an inkjet printhead, the method includes providing a housing including a back wall and a side wall extending from the back wall; inserting a spring into the housing such that a first end of the spring contacts the back wall of the housing; placing a first surface of a plate against a second end of the spring; providing a flexible sheet; bringing the flexible sheet into contact with an edge of the side wall of the housing; welding the flexible sheet to the edge of the side wall of the housing while applying a first level of vacuum between the flexible sheet and the back wall of the housing; and applying heat to the flexible sheet in a region corresponding to the plate while applying a second level of vacuum between the flexible sheet and the back wall of the housing, wherein the second level of vacuum is greater than the first level, thereby causing the sheet to conform to a second surface of the plate that is opposite the first surface of the

Abstract: An optical device may include a movable body holding a lens, a fixed body movably holding the movable body, a drive magnet and a drive coil for relatively moving the movable body with respect to the fixed body, and a metal member fixed to the drive magnet. The drive magnet is fixed to one of the movable body and the fixed body and the drive coil is fixed to the other of the movable body and the fixed body. A nickel plating layer containing at least nickel is formed on a surface of the drive magnet and a surface of the metal member, and the drive magnet and the metal member are joined to each other by a joining layer which is made of tin-based metal containing at least tin and is disposed between the drive magnet and the metal member.

Abstract: A method for hardfacing a metal component surface (14, 16), especially a shroud surface of a turbine blade made of a TiAl alloy, with at least one metal material (18, 20), in particular a Co—Cr alloy. The hardfacing coating is produced separately from the component surface and is then joined to the component surface in a high-temperature soldering process. A turbine blade including such a hardfacing coating, primarily in a shroud region (2).

Abstract: Electrical contact structures suitable for use on the wafer-side of wafer translators are produced using the programmable features of a wire-bonding machine and further using subsequent steps including but not limited to, masking, etching, grinding, and annealing. In one aspect, multiple electronic flame-off (EFO) operations are performed to produce both a free-air ball at one end of a wire for ball bonding, and to produce a region of modified grain structure in the wire at a predetermined distance from the free-air ball. The grain structure modification obtained by EFO operations affects the tail termination operation of the wire bonding machine thereby controlling, at least in part, the contact structure height and tip shape.

Abstract: A method of joining a first article to a second article using adjustment features located in an assigned scrap portion of the first article. The first article can be a casing for a turbine engine the first article being the casing skin and the second article a flange. The adjustment features are springs that can be stretched to increase the circumference of the skin. Following the correct sizing of the skin and joining to the flange the attachment features are removed along with the assigned scrap portion of the skin.

Abstract: A method for producing a stainless steel three-ply clad sheet for a fuel cell separator comprises heating a source blank and then performing rough rolling, hot rolling and cold rolling thereto, whereby the clad steel sheet for the fuel cell separator or a solid polymer type fuel cell separator thereby is obtained. The source blank for the clad steel sheet is composed of a stainless steel utilizing 0 to 0.3% B as a core component and a stainless steel containing 0.3 to 2.5% B as face component. The source blank is made using face components, a core component, tabs and protectors and performing steps including bonding of the tabs and protectors to the face components, removing portions of the tabs and protectors, piling of the face components to the core component, and further bonding of the face and core components together to form the source blank.

Abstract: A bearing comprising a high tensile steel layer and a mild steel base layer with said layers being fused together across a fusion zone, a raceway machined across the bearing, with said raceway having a bearing support depth which is substantially greater than a bearing support depth obtainable using traditional steel hardening processes, and a retention structure machined into at least the mild steel base layer and utilized to retain the bearing to an underlying bearing support.

Abstract: A method for manufacturing welded lap joints comprising the following steps: Providing of two components each having at least one base; allocating the components in such a way that the bases face each other and the components overlap in an overlapping area, which extends at least partially over both components; joining the components by welding in the overlapping area such that a weld joint is formed, wherein at the edge of the overlapping area non welded areas are formed; removing of the non welded areas whereby outer cutting areas are formed at the components, which are arranged at obtuse angles to the overlapping area.

Abstract: A method for forming a through-hole on a work material using a drill having a drill head provided with a brazed-type cutting blade helps prevent generation of a spiral mark on an inner circumferential face of the through-hole and obtains a superior appearance and high working accuracy. In forming a through-hole H on a work material W by a drill head 1A with cutting blades 3A to 3C brazed to cutting blade mounting seats 13a to 13c, a drill head provided with roundness R on a blade edge outer end portion 31a of a cutting blade 3A responsible for cutting of the outermost periphery is used as the drill head 1A.

Abstract: Provided is a method of repair which method is capable of holding a molten brazing material at the bonding portion when a component is bonded with a brazing material to an inclined or to a curved surface. The method of repair repairs by brazing a repair portion in which a crack has developed and which needs repair, wherein a brazing material support (4) holding in the interior thereof a molten brazing material (5) is brought into contact with the repair portion, and under the condition that the brazing material support (4) is in contact with the repair portion, the molten brazing material (5) is solidified. Under the condition that the brazing material (5) in a powder form is brought into contact with the brazing material support (4), the brazing material (5) can be melted by heating to a temperature at or above the melting point of the brazing material (5).

Abstract: A method and an apparatus for repairing gas-turbine blisks uses an endoscope 15 provided with processing optics featuring a flexible light guide arrangement 16. A laser source 9 is connected to a flexible optical fiber arrangement 10, with a filler material feeder 7 for supplying welding flux via a flexible line 8, with a water supply 11 connected to a flexible line 12, and with an inert gas supply 13 connected to a flexible line 16 for supplying inert gas, with the flexible lines 8, 12, 14, the flexible light guide arrangement 16 and the flexible optical fiber arrangement 10 being combined to form a flexible long repair implement 17 at least at its distal end areas.

Abstract: A drill head manufacturing method calls for a cutting tip to be CVD coated, brazed to a distal end of a drill head, polished and then PVD coated. The process effectively utilizes features of a CVD coating, which renders a tool service life longer and enables a drill head more suitable for high-speed cutting to be manufactured. A cutting tip having been CVD coated with a hard material is brazed at a brazing temperature to a predetermined portion at a distal end side of a head main body. An outer diameter portion OD of the brazed tip about a rotation axis of the head main body is polished. Then, the cutting tip and the head main body are PVD coated with a hard material at a second temperature lower than the brazing temperature.

Abstract: A method for attaching a porous metal layer to a dense metal substrate, wherein the method is particularly useful in forming orthopedic implants such as femoral knee components, femoral hip components, and/or acetabular cups. The method, in one embodiment thereof, comprises providing a solid metal substrate; providing a porous metal structure; contouring a surface of the porous metal structure; placing the porous structure against the substrate such that the contoured surface of the porous metal structure is disposed against the substrate, thereby forming an assembly; applying heat and pressure to the assembly in conjunction with thermal expansion of the substrate in order to metallurgically bond the porous structure and the substrate; and removing mass from the substrate after the porous structure is bonded to the substrate, thereby finish processing the assembly.

Abstract: A fuel rail for high-pressure direct-injection internal combustion engines has an injector holder and a fastening bracket directly attached to a main body of the fuel rail. Thermal deformation may occur at the time of temporary fitting or brazing when assembling the rail. However, positional accuracy of the injector holder can be assured, which results in having an excellent sealing property. Components of the fuel rail for direct-injection internal combustion engines are made of steel or stainless steel, and the components are joined reciprocally by brazing. The components joined by brazing are finished by cutting work and/or burnishing processing after the brazing step.

Abstract: Contact structures exhibiting resilience or compliance for a variety of electronic components are formed by bonding a free end of a wire to a substrate, configuring the wire into a wire stem having a springable shape, severing the wire stem, and overcoating the wire stem with at least one layer of a material chosen primarily for its structural (resiliency, compliance) characteristics. A variety of techniques for configuring, severing, and overcoating the wire stem are disclosed. In an exemplary embodiment, a free end of a wire stem is bonded to a contact area on a substrate, the wire stem is configured to have a springable shape, the wire stem is severed to be free-standing by an electrical discharge, and the free-standing wire stem is overcoated by plating. A variety of materials for the wire stem (which serves as a falsework) and for the overcoat (which serves as a superstructure over the falsework) are disclosed.

Abstract: A method for joining a tube and tube plate for use in a tube-and-shell heat exchanger is disclosed. The method enables a joint between the tube and tube plate that is substantially hermetic and substantially corrosion-resistant. The method comprises providing an anvil inside the tube, wherein the anvil supports the tube wall during a friction-stir welding process used to join the tube and tube plate. The anvil facilitates formation of a reliable weld region and enables faster friction-stir welding.

Abstract: A method of manufacturing a blisk comprising a disc joined to an aerofoil, wherein a union piece of partially sintered powder and having an alignment feature is provided. The union piece is connected between the disc and the aerofoil, which is aligned relative to the disc by the alignment feature of the union piece. Heat and pressure is subsequently applied to consolidate the first workpiece, union piece and second workpiece.

Abstract: A packaging system having a housing for providing a hermetically sealed interior space for receiving and supporting optoelectronic components. The housing has at least one section of wall comprising a layer of liquid crystal polymer (LCP). At least one hermetically sealed electrical port is formed in the LCP wall section over a predetermined area and comprises a layer of metal adhered to and overlying the predetermined area on the of the LCP wall section. An electrode passes through the metal from the exterior of the system to the interior space to provide an electrical communication path between the optoelectronic components and the exterior of said packaging system. A solder joint is formed between the electrode and the layer of metal to provide a hermetic connection between the layer of metal and the electrode to assure that the hermeticity of the housing remains unchanged with the electrical port present.

Abstract: To provide a novel multilayer printed wiring board in which a conductor on the outermost resin layer is positioned properly. Furthermore, to provide a novel multilayer printed wiring board in which productivity is enhanced when forming solder bumps on the pads for mounting a semiconductor element. In multilayer printed wiring board, multiple pads for connection with a semiconductor chip are formed on one surface, and on its opposite surface, external connection terminals for connection with another substrate are formed. The pads for connection with a semiconductor chip are formed in the central region of one surface, stiffener is formed in the peripheral region surrounding the pads for connection with a semiconductor chip, pads for connection with a semiconductor chip and stiffener are formed with the same material and are set to be the same height, and the actual area of the stiffener is determined according to the total area of the multiple pads for connection with a semiconductor chip.

Abstract: A method for the strengthening of a welded connexion, an element for a tower of a wind turbine, a tower of a wind turbine, and a wind turbine having a welded connexion with modified geometry are provided. The weld seam and/or for the increase of tolerance of a welded connexion in relation to fatigue load which welded connexion joins at least two sections of one component or at least one section of a first component and at least one section of a second component with each other, wherein the geometry of the weld seam and of at least one of the sections, which the at least one section adjoins to the weld seam, is specifically modified by removing welding material from the weld seam and by removing material of the respective section, which material adjoins to the weld seam.

Abstract: At least one section of the screw (11) has a wear-protection layer (13) and at least one other section of the screw preferably has an anti-friction layer (18). In a solid rod (11?), abed (12) for the wear-protection layer (13) is first formed, and in this the wear-protection layer (13) is then applied, and finally the interstices (14) between the screw flights (15) are formed. According to the invention, the wear-protection layer (13), for example composed of tungsten carbide, is applied by build-up welding, and the interstices (14) are formed with lateral separation (16, 16?) with respect to the wear-protection layer (13). For production of the anti-friction layer, the dimension of that/those section(s) of the screw (11) where the anti-friction layer, e.g. composed of molybdenum, is to be applied is reduced below specification, while providing lateral separation (19) with respect to the wear-protection layer. The anti-friction layer is then applied in the under-dimensioned region (17).

Abstract: A multilayer wiring board is so constituted that: a group of electronic part mounting capture pads are provided on one surface thereof; a first wiring layer formed on an uppermost layer thereof includes a first connection part arranged on the same surface as the surface where the pads are provided, and a second connection part spaced from the first connection part; the pad and the first connection part are electrically connected through a conductor wire, and the conductor wire is provided in a first insulating layer laminated on the first wiring layer; and the first connection part is connected linearly or curvedly to the second connection part through a first wiring pattern.

Abstract: Alloys of silver and an alloying element that diffuses to the surface of the high conductivity metal and is oxidizable to form an alloying element oxide such as beryllium are provided along with electronic structures employing the alloys and methods of fabrication.

Abstract: A method for manufacturing a printed wiring board having a bump. The method includes forming a solder-resist layer having a small-diameter aperture and a large-diameter aperture, each aperture exposing a respective conductive pad of the printed wiring board, and printing a solder paste in the large-diameter aperture in the solder-resist layer, but not printing the solder paste in the small-diameter aperture in the solder resist layer. The method also includes loading a solder ball in each of the large-diameter aperture and the small-diameter aperture using a mask having aperture areas that correspond to the small-diameter aperture and large-diameter aperture of the solder-resist layer, and forming a small-diameter bump from the solder ball in the small-diameter aperture and a large-diameter bump from both the solder paste and the solder ball in the large-diameter aperture.

Abstract: Provided is a first method for producing a source blank for a clad steel sheet composed of a stainless steel containing 0 to 0.3% B as a core component and a stainless steel containing 0.3 to 2.