Abstract:
A method of packaging an electronic component, which is capable of enhancing electrical and mechanical bonding reliability of the electronic component. Terminal (4) is provided on the side face of electronic component (1). Electrode (6) is formed on one or the other major surface of substrate (5) and terminal (4) provided in electronic component (1) is located on electrode (6). Solder paste produced by mixing solder particles with thermosetting flux is applied to electrode (6), terminal (4) of electronic component (1) is mounted on and brought into contact with the applied solder paste, and electronic component (1) is mounted on substrate (5) with clearance (S) provided between a part of electronic component (1) and opposing substrate (5). Solder bonding structure (8) for coupling terminal (4) and electrode (6) is formed by reflow. Solder bonding structure (8) includes solder bonding portion (8a), resin reinforcing portion (8b) and resin adhering portion (8c). Resin reinforcing portion (8b) reinforces solder bonding portion (8a), and resin adhering portion (8c) fixes electronic component (1) to substrate (5) when the resin entering clearance (S) between electronic component (1) and substrate (5) is solidified.
Abstract:
An electronic unit includes a module (1) in which a semiconductor device (3) is attached on the bottom of a circuit board (2) and which has lands (4) provided on the bottom of the circuit board, and a printed circuit board (5) on which the module is mounted, the printed circuit board having a hole (5a) in a position facing the semiconductor device and having electrical conductors (6) to which the lands are soldered. The module is mounted on the printed circuit board by soldering the lands to the electrical conductors while the semiconductor device is disposed in the hole. Accordingly, the electronic unit is smaller in height than conventional electronic units. Such a structure allows the module to be surface-mounted on the printed circuit board with solder paste, and thus high productivity of the electronic unit can be achieved.
Abstract:
A printed circuit board joining assembly adapted to join two printed circuit boards (1) together with an edge to edge alignment, said joining assembly having a clamping means (11, 13) holding at least one electrical conductor (3) so as to electrically connect an electrical conductor of a first of the boards with an electrical conductor of a second of the boards. A plurality of printed circuit boards with different functions may be joined in such a manner as to provide a complex electrical or electronic function.
Abstract:
A multi-layer circuit board including top (40), middle (24), and bottom (18) dielectric layers, a conductive pattern (44) disposed on the top surface (42) and a ground layer (46) disposed on the bottom surface of the top dielectric layer (40), a conductive pattern (28) disposed on the bottom surface (22) of the middle dielectric layer (24), and a ground layer (30) disposed on the bottom surface (16) of the bottom dielectric layer (18).