Abstract:
PROBLEM TO BE SOLVED: To provide an electronic circuit component mounting structure that excellently absorbs thermal stress based upon the difference in coefficient of linear expansion between a printed circuit board and a bus bar. SOLUTION: The bus bar 3A is fixed onto the board with an insulating sheet interposed, and a resin mold IC is joined to the bus bar 3A. The bus bar 3A has a parallel main portion 31 extending in an X direction and a bent end portion 32 bent from the tip of the parallel main portion 31 to reach the printed circuit board 6 and having its tip soldered to the printed circuit board 6. The bent end portion 32 has a first bend portion whose thickness direction matches the X direction, i.e. the length direction of the parallel main portion 31 of the bus bar 3A and a second bend portion whose thickness direction matches a Y direction, i.e. the width direction of the parallel main portion 31 of the bus bar 3A. Consequently, the thermal stress based upon the difference in coefficient of linear expansion between the printed circuit board and bus bar can excellently be absorbed, thereby improving the temperature cycle life of a soldering portion between the printed circuit board 6 and bus bar 3. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To joint wiring members with solder through a cover. SOLUTION: A bus bar 1 and a bus bar 2 overlapping each other are solder-jointed with irradiation of a laser beam spot 6 through a laser beam transmissive cover 3. Solder 5 is filled into a hole part 4 of the bus bar 1 located on the laser beam irradiation side in the thickness direction of the bus bars 1, 2, and a solder fillet is formed on an inner circumferential surface of the hole part 4 after the solder-jointing. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide electronic equipment using a bus bar whose current capacity is large and its manufacturing method for securing high heat radiating performance, for increasing the design flexibility of a circuit pattern, for configuring a large-scale circuit, and for achieving low-cost manufacturing. SOLUTION: A plurality of wiring metallic boards k worked into a predetermined pattern are arranged within the same plane, and a circuit 100k is configured. A plurality of electronic components D are soldered to the wiring metal boards k, and mounded on a wiring circuit 100k so that electronic equipment 100 can be configured. A resin case 100j, to which a plurality of wiring metallic boards k are fixed, is configured of a plate-shaped part jp, and a pillar-shaped part jc projecting from the plate-shaped part jp. The plurality of wiring metallic boards k are fixed to the pillar-shaped part jp of the resin case 100j, and the same plane, configured with the plurality of wiring metal boards k, is isolated from the plate-shaped part jp of the resin case 100j so that the electronic equipment 100 can be configured. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an electronic component bus bar joining structure which has excellent reliability to a temperature cycle and is easy to manufacture. SOLUTION: Terminals 4 on both sides of an electronic circuit component are joined to bus bars 3A and 3B with solder 6. The bus bar 3A is supported on a substrate 2 with a screw 7A; and the bus bar 3B is supported with a screw 7B. The screw 7B penetrates a long hole 9 which is long in the longitudinal direction of the bus bar 3B to be fastened to the female screw hole 21 of the substrate. Consequently, the solder 6 is prevented from being broken with stress in the longitudinal direction of the bus bar 3 produced because of differences in coefficient of linear expansion between the bus bars 3A and 3B and the substrate 2. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an easy-to-manufacture electronic component bus bar bonding structure excellent in reliability to a cold cycle. SOLUTION: A bus bar 3 bonded to the distal end 41 of the lead terminal 4 of an electronic circuit component by solder 6 is provided with wall parts 31 and 32 solder-bonded to the side face of the distal end 41 of the lead terminal 4. The solder 6 is thereby prevented from being damaged caused by stress in the longitudinal direction of the bus bar 3 generated by difference in a linear expansion coefficient between a substrate 2 and the bus bar 3. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a wiring board of which the electronic component can be surely soldered to a wiring metal plate, without forming a solder sticking preventive layer, for a suppressed cost. SOLUTION: A wiring board 1 comprises electronic components 2-4, wiring metal plates 5-12, and a solder 13. On the surfaces of the wiring metal plates 5-12, a plating layer of Ni is formed. The solder 13 is a Pb free solder. Here, a solder contact angle which is an index representing solder wetting is within 40°-45° range. Thus, a good fillet can be formed for sufficient jointing strength. So, the electronic components 2-4 are surely soldered to the wiring metal plates 5-12, with no solder sticking preventive layer of solder resist and resin required to be formed. Thus, the cost of the wiring board 1 is suppressed. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor mounting structure and its mounting method, capable of mounting a semiconductor component on a bus bar and a cooling metal substrate while suppressing complication of mounting work. SOLUTION: A semiconductor component 1 is placed on bus bars 2, 3 and is connected thereto. The bus bars 2, 3 are mounted on a cooling metal substrate 4 via an electric insulating sheet 5. A resin made nail shaped body 8 penetrates through holes of the bus bars 2, 3 and the electric insulating sheet 5 and is collectively pressed into a bottomed hole 41 of the cooling metal substrate 4. Hereby, the bus bars 2, 3 are fixed while being electrically insulated to the cooling metal substrate 4 by a bar-shaped resin member 9. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a commutator which can positively electrically connect a contact member an a terminal member and can position both of the members easily and also provide a fuel pump using such a commutator, and a method for manufacturing the commutator. SOLUTION: A commutator 50 is constituted of eight segments which are electrically insulated from each other by means of radial grooves 61, and each segment is constituted of a contact member 51 which brushes by a brush and a terminal member 53. A base metal of a contact members 51 before being divided by the grooves 61 has on the inner side an annular projection projecting toward a rotary shaft of the commutator. In an assembled state of the base metal of the contact members 53 and a base metal of the terminal members before filling in spaces between the contact members 51 and the terminal members 53 with connection material 57, the outer surface of the projection formed in the base metal of the contact members and the inner surface of the base metal of the terminal members surrounding the outer surface of the base metal of the contact members are in contact at several places, thereby allowing the contact members and the terminal members only to rotate. Since the base metal of the contact members and that of the terminal members can be assembled, without adjusting a space between the outer surface of the projection of the base metal of the cost members and the inner surface of the base metal of the terminal members, the number of manufacturing processes can be reduced.
Abstract:
PROBLEM TO BE SOLVED: To make possible soldering of all the leads of an electronic component by surely absorbing the variations of its leads, even when there exist the variations in the heights of its leads for its soldering to a board. SOLUTION: Interposing an adsorbent between an electronic part 100, its main body 101 and a board 200, the viscosity of the adsorbent is made reductive when heating the solder. That is, in the case of soldering, expanding the adsorbent along the whole surface of the board 200 and electronic component 100, as a result, the electronic component 100 is attracted to the side of the board 200 by the capillary force of the adsorbent to deform leads 102 by this attractive force and absorb the variations in the heights of the leads 102.
Abstract:
PROBLEM TO BE SOLVED: To provide a friction stir welding method that can prevent welding deformation due to a compression residual stress caused on both sides of a weld zone of the two members to be welded, by offsetting this stress timewise or spacewise. SOLUTION: This is a welding method in which a pin of the revolving tool is abutted on the weld zone 10 of the members 1, 2 to be joined, the contact part is softened by a frictional heat, and welding is performed by moving the tool while the contact part is stirred. The part once joined by the rotating first tool 5 is allowed to be joined again by using a second tool smaller than the first and rotating it opposite to the rotating direction of the first tool. As a result, the residual stress 20a caused by the first tool can be offset by the residual stress 20b caused by the second tool. COPYRIGHT: (C)2003,JPO