Abstract:
A tin-plated surface 7 is formed by hot-dip coating a solder containing a lead-free tin as the main component on an electrode 6 of a board 4 with which a connector terminal 1 comes in contact.
Abstract:
A tin-plated surface 7 is formed by hot-dip coating a solder containing a lead-free tin as the main component on an electrode 6 of a board 4 with which a connector terminal 1 comes in contact.
Abstract:
A method and apparatus for interconnecting electronic circuit boards (212, 214, 219, 221) through the use of twisted wire jumpers (231) which are formed from multifilament wire and which have enlarged bird cages (300) formed along the jumpers. The jumpers are drawn through a stack of circuit boards to position the cages in contact with plated interconnection apertures (303) located in the printed circuit boards. The frictional engagement of the cages (300) in the apertures (303) provides both electrical interconnection of, and mechanical coupling between the printed circuit boards (212, 214, 219, 221).
Abstract:
A method and apparatus for interconnecting electronic circuits (104) using nearly pure soft annealed gold mechanically compressed within through-plated holes (111). The invention has its application in attaching integrated circuit dice (104) directly to circuit boards (110) by ball bonding gold wires (101) to the bonding pads (105) of the integrated circuit dice (104) in a substantially perpendicular relationship to the surfaces of the dice (104) and inserting the gold leads (101) into through-plated holes (111) of circuit boards (110) which provide an electrical and a mechanical connection once the leads (101) are compressed within the through-plated holes (111). The present invention also finds its application in the interconnection of sandwiched circuit board assemblies (200) where soft gold lead wires are inserted into axially aligned through-plated holes of the circuit boards (212, 214, 216, 217, 219, 221) and compressed so that the gold lead wires compress and buckle within the through-plated holes, forming an electrical connection between the circuit boards (212, 214, 216, 217, 219, 221).