Abstract:
An electrical device which comprises first and second laminar electrodes and a laminar PTC resistive element sandwiched between them, the device comprising: (a) a main portion which comprises a main part of the first electrode, a main part of the second electrode, and a main part of the resistive element; and (b) a first connection leg which extends away from the main portion and which comprises a first leg part of the first electrode which is integral with the main part of the first electrode, and a first leg part of the resistive element which is integral with the main part of the resistive element. Such devices can be secured to circuit boards in a variety of ways, and to elastically deformed terminals.
Abstract:
Shaped contacts (40, 42) for interconnecting circuits or for use in an integrated circuit test probe are electroplated as integral parts of circuit traces (34) upon a stainless steel mandrel (10). A shaped, hardened steel indentation tool makes indentations (24a, 24b) of predetermined shape in the surface of the mandrel (10), which is provided with a pattern of dielectric, such as Teflon (12), or photoresist. Areas of the steel mandrel, including the indentations (24a, 24b), are electroplated with a pattern of conductive material (34, 36, 38), and a dielectric substrate is laminated to the conductive material. The circuit features formed by the indentations define raised contacts of a conical or pyramidal shape, having free ends with a small area that allows higher pressures to be applied to a surface against which the contacts are pressed. This enables the contacts to penetrate foreign materials, such as oxides, that may form on the surface of the pads, to which the contacts are to be connected to ensure a good contact without any need for wiping action.
Abstract:
A system of interconnecting electrical components having conflicting bonding requirements for mounting the components to a printed circuit board. The system includes a primary printed circuit board (12) having a pattern of through-holes and having arrangements of connection sites to receive electrical components. For example, the connection sites of the primary printed circuit board may be of the type to receive components associated with the bonding requirements of surface mounting. A secondary printed circuit board (10) has a pattern of through-holes (14,16,18) corresponding to the pattern of through-holes of the primary printed circuit board. The circuit boards are wave soldered or surface mounted together by means of the corresponding patterns of through-holes. Attached to the secondary printed circuit board is one or more electrical component having bonding requirements which conflict with those of the primary printed circuit board. Preferably, a tape automated bonding frame (24) is in pressure contact with the through-holes of the secondary printed circuit board for electrical communication between the board via the through-holes.
Abstract:
@ L'invention concerne un dispositif de connexion électrique entre deux cartes de circuits imprimés et un procédé de connexion de deux cartes de circuits imprimés à l'aide d'un tel dispositif. Dispositif de connexion électrique entre deux cartes de circuits imprimés, chacune de ces deux cartes comportant au moins un trou métallisé et le dispositif de connexion étant réalisé à partir d'un matériau isolant souple comportant en plus des dépôts conducteurs formant des pistes sur toute sa longueur et connectées entre au moins deux trous métallisés (23) destinés à coopérer électriquement avec les trous métallisés (16) des cartes de circuits imprimés (4 et 5) et une couche de colle recouvrant partiellement la face située en regard des cartes de circuits imprimés, destinée à assurer la liaison mécanique avec celles-ci. Procédé de connexion électrique entre deux cartes de circuits imprimés.