Abstract:
An adhesive joint system comprises a circuit board with a distal end and a proximal end mounted on a first side via a tongue and groove connection to a housing. An adhesive is positioned at least in the gap surrounding the tongue, and an electrical component mounted to the distal end on a second side of the circuit board that is opposite the first side. The respective coefficients of thermal expansion (CTE) of the tongue, adhesive, and the material defining the groove are related, such that as heat is applied to the tongue and groove connection, the adhesive is compressed within the gap.
Abstract:
In einem Verfahren zum Herstellen eines Modulstreifens (200) mit Erhebungen (240) in einer auf einer Seite des Modulstreifens (200) angeordneten elektrisch leitfähigen Schicht (230) werden zunächst eine Trägerschicht (220) und die elektrisch leitfähige Schicht (230) bereitgestellt. Weiterhin wird eine Matrizenfolie (300) bereitgestellt, welche Aussparungen (310) aufweist. Die Matrizenfolie (300) wird dann zusammen mit der Trägerschicht (220) und der elektrisch leitfähigen Schicht (230) einer Endloslaminierpresse (100) zugeführt. Dabei wird die elektrisch leitfähige Schicht (230) zwischen der Matrizenfolie (300) und der Trägerschicht (220) angeordnet. Die Trägerschicht (220) wird mit der elektrisch leitfähigen Schicht (230) in der Endloslaminierpresse (100) in einem kontinuierlichen Prozess zu dem Modulstreifen (200) verbunden. Dabei wird die elektrisch leitfähige Schicht (230) in die Aussparungen (310) der Matrizenfolie (300) gepresst, wodurch sich die gewünschten Erhebungen (240) in der elektrisch leitfähigen Schicht (230) ergeben.
Abstract:
A method of manufacturing a multilayer flexible circuit comprises providing first and1 second flexible substrates, each comprising a conductor layer and an insulator Iayer. The conductor layer of the first substrate is a patterned conductor Iayer. The first and second substrates are laminated together using a double belt press through which the substrates move in a continuous process. The method may include patterning the conductor layer of the first substrate and/or the conductor layer of the second substrate using an etching method that includes exposing a dry film resist on the conductor layer to a pattern by carrying out a plurality of exposures of adjacent and/or overlapping areas.
Abstract:
A method for building an interlayer connection structure where wiring layers (22) or metallic layers (27) formed on both sides of an insulating layer (26) are interlayer-connected through an interlayer connection projection (B), comprising the steps of stacking at least a sheet member (2) deformable concavely, a metallic layer forming member, and a thermally-adhesive insulating layer forming member in this order of mention between a press surface (1) and a body to be laminated and having the interlayer connection projection, conducting hot press of the stack using the press surface to produce a laminate having a projection in a position corresponding to the interlayer connection projection and having a metallic layer on its surface, removing the projection of the laminate to expose the interlayer connection projection, and electrically connecting the exposed interlayer connection projection and the metallic layer disposed near the interlayer connection projection with the insulating layer interposed therebetween, whereby the thickness of the insulating layer between layers can be uniformed, and the planarization of the surface and thickness control of the insulating layer can be effected even if the insulating layer contains reinforcing fibers. An interlayer connection structure built by the method and a multilayer wiring board are also disclosed.
Abstract:
The invention relates to a method for contacting electrical contact surfaces (21, 112) on a surface (20) of a substrate (1). According to said method, a film (3) based on polyimide or epoxy is laminated onto the surface, under a vacuum, in such a way that the film closely covers the surface comprising the contact surfaces and adheres to the same. Each contact surface to be contacted on the surface is uncovered by opening respective windows (31) in the film, and a contact is established in a plane manner between each uncovered contact surface and a layer (4) of metal. The inventive method is used to establish a large-surface contact for power semiconductor chips, enabling a high current density.