Abstract:
A substrate (16) with hermetically sealed vias (18) extending from one side of the substrate to another and a method for fabricating same. The vias may be filled with a conductive material such as, for example, a fritless ink. The conductive path formed by the conductive material aids in sealing one side of the substrate from another. One sideof the substrate may include a sensing element (12) and another side of the substrate may include sensing electronics (14).
Abstract:
An RF interconnect is incorporated in RF module packages (50) for direct attachment onto a multi-layer PWB (100) using compressible center conductor (fuzz button) interconnects. The module has circuitry operating at microwave frequencies. The module package includes a metal housing (52) including a metal bottom wall structure (54). The module includes a plurality of RF interconnects, which provide RF interconnection between the package (50) and the PWB (100). Each interconnect includes a feedthrough center pin (72) protruding through an opening formed in the metal bottom wall, with isolation provided by a dielectric feedthrough insulator (74). The center pin is surrounded with a ring of shield pins (76) attached to the external surface of the bottom wall of the module housing. The pins are insertable in holes (116a, 116b) formed in the PWB (100), and make contact with fuzz button interconnects (130, 132) disposed in the holes (116a, 116b). Circuitry (148, 150) connects the fuzz button interconnects (130, 132) to appropriate levels (120, 122, 124) of the PWB signal conduction.
Abstract:
A technique for use in manufacturing electronic assemblies involves forming a hole (170) in one side (128) of a circuit board (130) and only partially through the board. A pin (164, 166), such as an electrically conductive lead, is then inserted into the hole, and an adhesive material (176, 178) is used to bond the pin to the circuit board.
Abstract:
Temporary connections to spring contact elements extending from an electronic component such as a semiconductor device are made by urging the electronic component, consequently the ends of the spring contact elements, vertically against terminals of an interconnection substrate, or by horizontally urging terminals of an interconnection substrate against end portions of the spring contact elements. A variety of terminal configurations are disclosed.
Abstract:
When a printed wiring board which has inner layer conductor circuits (161 and 131) between insulating layers (101 - 103) and blind via-holes (141 and 142) made from the top surface of the insulating layer to the inner layer conductor circuits is manufactured, a hole (160) is provided beforehand in the center part of the inner layer conductor circuits (161) at the bottom of the blind via-hole (141), and a laser beam is applied from the top surface side of the insulating layer to form the blind via-holes (141 and 142). After that, metal plating films are formed on the surfaces of the inner layer conductor circuits (131 and 161) and the blind via-holes (141 and 142).
Abstract:
A carrier and a semiconductor device having improved reliability, such as a heat cycle resistance, in mounting onto a circuit board. The semiconductor carrier (3) constituting the semiconductor device (1) includes recesses, on the bottoms of which external electrodes (8) are formed. With cream solder (13) filled into the recesses, the carrier is flipped and mounted on the circuit board (12). Heating is made at a temperature higher than the melting point of the cream solder (13).
Abstract:
According to a process for soldering the leads of SMD components (3) on a printed circuit board (1), a surface structure is formed on the printed circuit board (1) in such a way that depressions are located where the leads are to be soldered. The SMD components (3) are placed with their leads (31) in the depressions filled with solder.
Abstract:
An electronic circuit mount (1), for semi-conductor chips, has a series of closed-bottomed recesses (2) within the thickness (t) of the mount, with each recess opening to a surface (3) of the mount and being shaped to house a semi-conductor chip (9) of given configuration; the amount having an applied pattern (6) of chip-interconnecting electrical conductors (7) extending over the mount and to each recess; the mount being moulded from thermoplastic material and each recess having means (4, 10) for conducting away and dissipating heat therefrom. In use, the heat conducting and dissipating means convey heat generated by a chip away from the recess it is mounted in and prevents the thermoplastic of the mount in the area of the recess from degrading.