100results about How to "Easy solder connection" patented technology

Provided is a method for manufacturing a semiconductor device that solders to connect a semiconductor chip having bumps via a heat-hardened bonding agent layer to a substrate having an electrode corresponding to the bumps that includes, in succession, (A) a process for forming the heat-hardened bonding layer in advance on a surface having the bumps of a semiconductor chip; (B) a process that matches the surface on the heat-hardened bonding agent layer side of the semiconductor chip formed with a heat-hardened bonding agent layer to a substrate, and pre-bonds by using a heat seal to obtain a pre-bonded layer; and (C) places a protective film having thermal conductivity of at least 100 W / mK between the heat seal and the surface on the semiconductor chip side of the pre-bonded layer and uses a heat seal to harden the heat-hardened bonding agent layer simultaneously to melting the solder between the semiconductor chip and the substrate. A method for manufacturing a semiconductor device is that obtains good connections without sandwiching resin between the solder bumps and an electrode pad is provided.

The invention discloses an enclosed bus installing device and method. The enclosed bus installing device comprises a laser lamp and a reflector, wherein the laser lamp is detachably connected to one enclosed bus shell, the reflector is arranged on the other enclosed bus shell. The two shells are each provided with an adjusting mechanism. Each adjusting mechanism comprises a horizontal adjusting mechanism and a vertical adjusting mechanism. Each horizontal adjusting mechanism comprises a base connected to the ground, wherein a sliding block is connected to the base in a sliding manner, the baseis provided with a sliding mechanism driving the sliding block to move, and the sliding mechanism is provided with a locking mechanism capable of limiting movement of the sliding block. Each verticaladjusting mechanism is connected to the corresponding sliding block, an arc plate is fixed to the vertical adjusting mechanism, the vertical adjusting mechanism can drive the arc plate to move in thevertical direction, and the axis of the arc plate and the movement direction of the sliding block are perpendicular. A supporting mechanism is arranged below the ends, close to each other, of the twoshells. The enclosed bus installing device has the effect of conveniently and rapidly adjusting the coaxiality between two enclosed buses.

There is provided a flux for soldering and a soldering process which form better solder connection without the occurrence of the poor connection nor the insulation degradation.Such flux which is placed between a solder portion formed on a first electrode and a second electrode when the first electrode is soldered to the second electrode contains:a liquid base material made of a resin component which is dissolved in a solvent,an active component which removes an oxide film, anda metal powder made of a metal of which melting point is higher than that of a solder material which forms the solder portion, andthe flux contains the metal powder in an amount in the range between 1% and 9% by volume based on a volume of the flux.

Embodiments of the invention relate to making reconnection when a soldered connection fails in a head / slider used in a magnetic disk drive. In one embodiment, a solder mass deposited on a slider pad of a head / slider is separated from a lead pad and a solder ball connection is yet to be made between the slider pad and the lead pad. A shaping tip is heated to a temperature near a melting point of a solder. The shaping tip is moved in parallel with a surface of the slider pad toward the side of the lead pad to soften the solder mass. The solder mass is thereafter irradiated with a laser beam so as to form a solder fillet, thereby making a soldered connection between the lead pad and the slider pad.

The invention discloses a soldering device for forming an electrical soldering point in a magnetic disc driver. The soldering device comprises a nozzle device, an actuating device, a solder ball feeding device, a pressurized gas feeding device and a laser generator, wherein the nozzle device comprises at least two separated movable casings; a passage is formed by the two casings; an inlet is formed by the upper ends of the two casings; a nozzle is formed by the lower ends of the two casing; the actuating device is connected with the nozzle device, and is used for controlling the two casings of the nozzle device to move close or separate so as to control the inside diameter of the nozzle; the solder ball feeding device is used for delivering a solder ball at the inlet or the nozzle to the passage; the pressurized gas feeding device is used for feeding pressurized gas into the passage to control the falling speed of the solder ball in the passage; and the laser generator is used for emitting laser to the passage so as to melt and return the solder ball. According to the soldering device, the size of the nozzle is controllable, so as to facilitate soldering.

The invention provides a double T-shaped composite beam provided with prestressed steel tube concrete core rods, which is formed by utilizing the prestressed steel tube concrete core rods as tensioned lower flanges, adopting corrugated steel plates as web plates and pouring an upper flange top plate with high-strength concrete. The prestressed steel tube concrete core rods consist of steel tubes, intra-tube concrete and prestressed steel bars, and have high tension capacities; as the prestressed steel tube concrete core rods are combined with the corrugated steel web plates for use, the advantages are complemented, the shear capacity and flexural capacity of a crossbeam are improved, and the crossing ability of the crossbeam is improved. The composite beam has the advantages of light weight, great crossing ability, high bearing ability, high stiffness, low cost and the like, can be suitable for volume production in prefabricated part factories, can serve as a roof beam for constructing a 30-48m oversized-span single-storey industrial factory building, and as a floor beam for constructing a 21-30m large-span multi-storey industrial factory building, meets the requirements of industrial production on a large space, and saves land.

The invention relates to a connecting structure between a water chamber and a main leaf of a novel automobile radiator. The connecting structure comprises an upper water chamber (3), an upper main leaf (4), a lower water chamber (9) and a lower main leaf (11); wherein, a circle of outer folded-edges I (3.1) extending outwards are arranged on the lower edge of the upper water chamber (3), relative to the circle of the outer folded-edges I, a circle of inner folded-edges I (4.1) are vertically arranged on the outer edge of the upper main leaf (4), and the outer folded-edges I (3.1) on the lower edge of the upper water chamber (3) are closely covered outside the circle of inner folded-edges I (4.1) on the outer edge of the upper main leaf (4), and fixedly connected in a braze welding way; a circle of outer folded-edges II (9.1) extending outwards are arranged on the upper edge of the lower water chamber (9), relative to the circle of the outer folded-edges II, a circle of inner folded-edges II (11.1) are upward vertically arranged on the outer edge of the lower main leaf (11), and the outer folded-edges II (9.1) on the upper edge of the lower water chamber (9) are closely covered outside the circle of the inner folded-edges II (11.1) on the outer edge of the lower main leaf (11), and are fixedly connected in a braze welding way. By adopting the connecting method that the main leaves are loaded in the water chambers, the outline of the product is an integral structure on the construction, therefore, the water chambers are firmly welded with the main leaves.

The invention discloses a stator assembly and a motor with the stator assembly. The stator assembly comprises a stator core and a stator winding; the stator core is provided with a plurality of statorgrooves, the stator winding is formed by a plurality of U-shaped conductor sections, each U-shaped conductor section comprise a first type conductor section and a second type conductor section; the stator winding comprises an A-phase first winding and an A-phase second winding, the A-phase first winding comprises a first sub-winding section, a second sub-winding section, a third sub-winding section and a fourth sub-winding section which are connected in sequence, and the A-phase second winding comprises a fifth sub-winding section, a sixth sub-winding section, a seventh sub-winding section, and an eighth sub-winding section which are connected in sequence; welding ends corresponding to the second sub-winding section of the A-phase first winding and the seventh sub-winding section of the A-phase second winding is designed to span (y-1) stator grooves, whereby the distance at the welding end can be reduced, while for the entire winding process of the phase A, the distance between the Aphase star point line and the outgoing line can be reduced, and the welding connection is facilitated.

The invention relates to a method for producing a piston (10, 110, 210) for an internal combustion engine, characterized by the following steps: a) producing an upper piston part (11, 111, 211) having at least one joining surface (21, 22; 121, 122), b) producing a lower piston part (12, 112, 212) having at least one joining surface (23, 24; 123, 124), c) establishing a direct contact between the at least one joining surface (21, 22; 121, 122) of the upper piston part (11, 111, 211) and the at least one joining surface (23, 24; 123, 124) of the lower piston part (12, 112, 212), d) heating the upper piston part (11, 111, 211) and the lower piston part (12, 112, 212) in the region of the joining surfaces (21, 23; 22, 24; 121, 123; 122, 124) brought in direct contact by induction or by a direct current flow through the joining surfaces (21, 23; 22, 24; 121, 123; 122, 124), and (e) connecting the upper piston part (11, 111, 211) and the lower piston part (12, 112, 212) to form a piston (10, 110, 210) by means of a pressing process and optionally finishing the piston (10, 110, 210).

The invention discloses a stator assembly and a motor with the stator assembly. The stator assembly comprises a stator core and a stator winding; the stator core is provided with a plurality of statorgrooves; the stator winding comprises an A-phase winding; the A-phase winding comprises a plurality of first sub-winding sections, a second sub-winding section, a plurality of third sub-winding sections, a fourth sub-winding section, a bridging line, a fifth sub-winding section, a plurality of sixth sub-winding sections, a seventh sub-winding section and a plurality of eighth sub-winding sectionswhich are sequentially connected; the initial end of the A-phase winding is connected with an A-phase outgoing line; the termination end of the eighth sub-winding section is connected with an A-phasestar point line; the corresponding welding end of the second sub-winding section and the seventh sub-winding section of the A-phase winding is designed to span (y-1) stator grooves, so that the distance at the welding end can be reduced, and for the whole winding process of the A phase, the distance between the A-phase star point line and the A-phase outgoing line can be reduced, and welding connection is easy to realize.

The invention discloses a stator assembly and a motor with the same. The stator assembly comprises a stator core and a stator winding. The stator core is provided with a plurality of stator slots, thestator winding is formed by a plurality of U-shaped conductor sections, and the U-shaped conductor sections comprise a first type conductor section and a second type conductor section. The stator winding comprises an A-phase first winding and an A-phase second winding, the A-phase first winding comprises an A-phase first sub-circuit and an A-phase second sub-circuit, the A-phase first sub-circuitand the A-phase second sub-circuit are wound in parallel, the A-phase second winding comprises an A-phase third sub-circuit and an A-phase fourth sub-circuit, and the A-phase third sub-circuit and the fourth sub-circuit are wound in parallel. At the corresponding welding ends of the second sub-winding section of the A-phase first winding and the seventh sub-winding section of the A-phase second winding, the welding ends span the (y-1) stator slots, so that the distance at the welding ends can be reduced, the welding connection is easy to realize, the conductor area is reduced, and the skin effect can be effectively reduced.

The invention relates to an automobile heater, which comprises a water feeding chamber(3), a drain chamber(8), a water inlet pipe(1), a main leaf(4), a side board(5), a heat dissipation belt(7) and a flat tube(6); wherein a plurality of tooth bits (4.1) meshed at the bottom edge (3.1) of the water feeding chamber(3) and the drain chamber(8) are arranged at the periphery of the main leaf(4) at the joint between the water feeding chamber(3) and the drain chamber(8); two bulges (5.1) or elbows (5.2) are respectively arranged at the sidewall of the position of the side board(5) corresponding to both ends of the heat dissipation belt(7); a lug (4.2) occluded at the terminal of the side board(5) is positioned at the joint between the terminal of the side board(5)and the main leaf(4); a buffer plate(9) is arranged between the water outlet of the water inlet pipe(1) and the water inlet of flat tube(6) facing to the water outlet of the water inlet pipe(1). The automobile heater has the advantages that: the connection between the water chambers and the main leaf is firm, which can prevent the part melting and dropping of the heat dissipation belt in the process of welding production; the connection between the side board and the main leaf can be firm and reliable; and can make balanced water feeding flow of all flat tube.