Abstract:
Disclosed is a laminated (or non-laminated) conductive interconnection for joining an integrated circuit device to a device carrier, where the conductive interconnection comprises alternating metal layers and polymer layers. In addition, the polymer can include dendrites, metal projections from the carrier or device, and/or micelle brushes on the outer portion of the polymer. The polymer layers include metal particles and the alternating metal layers and polymer layers form either a cube-shaped structure or a cylinder-shaped structure.
Abstract:
A process for manufacturing a wiring board comprising a substrate made of an insulation material and having first and second surfaces, first and second conductor patterns formed on the first and second surfaces, respectively, and a via conductor penetrating the substrate to electrically connect the first conductor pattern with the second conductor pattern; the process comprising the following steps of: forming the substrate with a through-hole penetrating thereto and defining openings at the first and second surfaces, respectively; plating the substrate with a metal so that a metal layer having a predetermined thickness is formed on the respective first and second surfaces of the substrate and the through-hole is substantially filled with the metal to be the via conductor; irradiating a laser beam, as a plurality of spots, around a metal-less portion of the plated metal, such as a dimple or seam, at positions corresponding to the openings of the through-hole, so that the a part of the plated metal melts to fill the metal-less portion with the molten metal.
Abstract:
First, there are prepared a semiconductor chip with a group of solder bumps disposed on and joined to a surface thereof in a predetermined pattern, and a multilayer plate including a second layer as an electrically conductive layer and first and third layers disposed on respective opposite surfaces of the second layer and comprising metal layers of one metal. Then, the first layer and the third layer of the multilayer plate are etched in a predetermined pattern to form a first group of posts and a second group of posts which have a pattern identical to the pattern of the group of solder bumps. Then, semiconductor chip is positioned to hold the solder bumps in contact with the posts of the first group, and the solder bumps are melted to join the solder bumps to the posts of the first group. Thereafter, the second layer is cut between the posts of the first and second groups, producing separate multilayer posts.
Abstract:
A circuit board includes a first layer of an electrically non-conducting material for carrying circuit components, and a second layer of an electrically conductive material for providing a common ground. At least one spot of a relatively more solderable material than the material of the second layer is in electrical contact with the second layer and is aligned with an opening through the first layer so that electrical connection can be made between the components on the first layer and the second layer by soldering to the spot. These anchor points provide a reliable way to connect circuit components to a common ground, from the top of the circuit board, without having to use backside screws and without having to penetrate the second layer.
Abstract:
An electrically conducting bonding connection (B) is produced between an electronic circuit (S) arranged on an electrically conducting support plate (1) and the support plate (1) by providing a hole (4, 5), into which an electrically conducting bonding element (2) with a bondable surface (3) is pressed in such a way that the support plate (1) and the bonding element (2) enter into an electrically conducting and frictional connection; the bonding connection is subsequently produced with the bonding element (2).
Abstract:
A light emitting device according to the present embodiment includes a substrate on which a wiring portion is provided; a light emitting element which is provided on the substrate and is electrically connected to the wiring portion; a feeding portion to which an electric power is supplied from the outside; a first connection portion which is provided on the substrate and is electrically connected to the wiring portion; a second connection portion which is joined to the first connection portion through soldering and includes a first opening portion into which the feeding portion is inserted; and a soldering portion which is provided between the first opening portion and the feeding portion.
Abstract:
A flexible printed circuit (FPC) and electronic component assembly. The FPC comprises a first protective layer having a first opening, a main layer on the first protective layer, and a second protective layer having a second opening exposing the main layer. The heat produced from the electronic component can be transmitted to the main layer by a heat-conductive medium between the electronic component and the main layer, and can be diffused via the first opening.
Abstract:
A semiconductor device is provided that includes a semiconductor chip, a plurality of solder bumps that electrically couple the semiconductor chip to the outside, and a metal bump being provided on the surface of each first solder bump which is at least a part of the plurality of solder bumps and being made of a metal having a melting point higher than that of the first solder bump. The wettability of the first solder bump is improved as each metal bump serves as a core when the corresponding first solder bump melts. Thus, the connection reliability of the first solder bump can be improved.
Abstract:
Disclosed is a laminated (or non-laminated) conductive interconnection for joining an integrated circuit device to a device carrier, where the conductive interconnection comprises alternating metal layers and polymer layers. In addition, the polymer can include dendrites, metal projections from the carrier or device, and/or micelle brushes on the outer portion of the polymer. The polymer layers include metal particles and the alternating metal layers and polymer layers form either a cube-shaped structure or a cylinder-shaped structure.
Abstract:
A method to replace an electrical interface on a printed circuit board having a plurality of contact pads on a top surface, the contact pads being connected to conducting material extending through said circuit board. For the contact pad being replaced, drilling a hole through said printed circuit board at that location, and removing any remaining conductor material attached to the contact pad on the top board surface. Providing a replacement conductor/contact pad structure having a generally T-configuration with a stem and a head that completely surrounds the stem, wherein said head has a diameter greater than the diameter of the drilled hole. Inserting the replacement conductor/contact pad into the hole with said stem extending beyond the second surface of the board with the bottom surface of the head being in contact with the first surface of said board. A replacement conductor/contact pad on repaired board is also described.