Abstract:
A method for mounting terminal on circuit board includes an applying process for applying solder paste (3) to a desired circuit board (1), a laying process for laying the connecting ends (4a) of terminals (4) having the connecting ends (4a) and non-connecting ends (4b) on the parts coated with the paste (3), and a heating process for melting the paste (3) for soldering the connecting ends (4a) to the board (1). In the applying process, a plurality of sets of solder paste applying parts (3a-3d) which are separated from each other are provided on the board (1). In the laying process, each connecting end (4a) is laid across each set of parts (3a-3d).
Abstract:
A transferring plate (10) is manufactured by forming an insulating masking layer (12') of a desired pattern on a conductive substrate (11) at least the surface of which is conductive, and forming a multilayer of a conductive layer (14) and an insulating resin layer (15) on the exposed portion of the conductive surface of the substrate (11). The wiring pattern composed of the conductive layer (14) and the insulating resin layer (15) formed on the plate (10) is transferred to a substrate (2) for a multilayer printed wiring board. Similar plates (10) having different wiring patterns are made and the patterns are transferred to the substrate (2). Therefore, a multilayer of wiring patterns (3, 4, 5, ...) are formed on the substrate (2). The patterns (3, 4, 5, ...) are respectively composed of conductive layers (3a, 4a, 5a, ...) and insulating resin layers (3b, 4b, 5b, ...).
Abstract:
The present invention relates generally to a new method of repairing electrical lines (12), and more particularly to repairing electrical lines (12) having a defect. First an area (21, 22) around the defect is ablated by laser at the module level with devices in place. Various methods and processes are then used to repair this open (24) or defective portion (18, 68) in an electrical conductor line (12). It could be repaired by securing a jumper wire (40) or nugget across the open or the repair could be made by a deposition process, which includes but is not limited to filling the open (24) with a solder type material (26) or inserting a solder coated electrical wire (30) and heating the solder and allowing the solder to melt and repair the open.
Abstract:
A laminated structure (1) of flexible card-like form, for repairing and/or manufacturing an electrical circuit comprises a layer (2) of solder, superimposed on a layer (3) of electrically conductive material, (copper), which is in turn superimposed on a layer (4) of adhesive material. An intermediate layer (5) of brass effectively increases the surface area of the conductive layer (3). The adhesive layer (4) is covered by a removable backing layer (6) of paper. The laminated structure (1) is delineated by cuts (10) so as to form a plurality of individual conductive components in various forms, to be stripped from the structure (1). A component is applied to the damaged area of the circuit, hold by the self-adhesive layer (4), and soldered.
Abstract:
A contact means is a part in a telephone apparatus or a corresponding apparatus. The contact means is intended to enable electric contact between two circuit boards (1, 2) arranged under relative angle and having electrically conducting circuits. On an electrically insulated support (3) there are arranged contact elements (4) made of electrically conducting material. Said boards (1, 2) are formed with electrically conducting parts (1a, 2a). Said parts of the boards, arranged under relative angle, are pressed against the contact elements for obtaining electric contact between the boards.