Abstract:
A method of manufacturing a printed circuit comprising the following steps: In a connection portion (1) of a printed circuit (10) formed on an insulating substrate (20), another circuit portion (4) such as a jumper circuit is applied with resin ink; and a connection circuit for the circuit terminal portion (4a) of said printed circuit is formed by applying electroconductive ink after a portion (2a) of the terminal surface of said circuit terminal poriton (4a) has been covered with resin ink.
Abstract:
A power component such as a power transistor is mounted on an insulating substrate of e.g. Beryllia. By using a thick film deposition technique. A first layer (2) is deposited and a second layer (3) is deposited over the first layer to produce a regular series of troughs and lans, in the preferred embodiment troughs and ridges, whereby voiding in the solder bond is minimised if not eliminated to thus maintain a good thermal conductivity between the component and the substrate.
Abstract:
Procédé de fixation d'un connecteur sur le substrat d'un circuit imprimé et pion de fixation de ce connecteur sur le substrat. Pour la fixation d'un connecteur (6) sur le substrat (4) d'un circuit imprimé (2), le maintien temporaire du connecteur sur le substrat est assuré par le coincement d'au moins un pion de fixation (30) muni de stries (38) dans le substrat. La fixation definitive est réalisée par un dépôt de soudure (40, 18) sur les extrémités des pions (30) et des queues de connexion à souder (16) du connecteur respectivement, par exemple lors d'une opération de soudure "à la vague".
Abstract:
The present invention is a method and structure which produces extremely thin, electrically conductive epoxy bonds (24) between two substrates (12, 14). Copper microspheres (26), having an average diameter of about 2 microns are bound in an epoxy layer (28) which bonds two substrates (12, 14) together. The microspheres (26) make electrical contact between the substrates (12, 14) while providing inter- sphere gaps which are filled with the epoxy which actually bonds the substrates (12, 14) together.
Abstract:
In a method for producing a module strip (200) with elevations (240) in an electrically conductive layer (230) arranged on one side of the module strip (200), first a carrier layer (220) and the electrically conductive layer (230) are provided. A stencil foil (300), which has clearances (310), is also provided. The stencil foil (300) is then fed together with the carrier layer (220) and the electrically conductive layer (230) to a continuous laminating press (100). The electrically conductive layer (230) is in this case arranged between the stencil foil (300) and the carrier layer (220). The carrier layer (220) is bonded to the electrically conductive layer (230) in the continuous laminating press (100) in a continuous process to form the module strip (200). In this process, the electrically conductive layer (230) is pressed into the clearances (310) in the stencil foil (300), whereby the desired elevations (240) are obtained in the electrically conductive layer (230).
Abstract:
A heat radiator (1) includes an insulating substrate (3) whose first side serves as a heat-generating-element-mounting side, and a heat sink (5) fixed to a second side of the insulating substrate (3). A metal layer (7) is formed on a side of the insulating substrate (3) opposite the heat-generating-element-mounting side. A stress relaxation member (4) intervenes between the metal layer (7) of the insulating substrate (3) and the heat sink (5). The stress relaxation member (4) is formed of an aluminum plate (10) having a plurality of through holes (9) formed therein, and the through holes (9) serve as stress-absorbing spaces. The stress relaxation member (4) is brazed to the metal layer (7) of the insulating substrate (3) and to the heat sink (5). This heat radiator (1) is low in material cost and exhibits excellent heat radiation performance.