Abstract:
A dual solder layer for fluidic self assembly, an electrical component substrate, and method employing same is described. The dual solder layer comprises a layer of a self-assembly solder disposed on a layer of a base solder which is disposed on the solder pad of an electrical component substrate. The self-assembly solder has a liquidus temperature less than a first temperature and the base solder has a solidus temperature greater than the first temperature. The self-assembly solder liquefies at the first temperature during a fluidic self assembly method to cause electrical components to adhere to the substrate. After attachment, the substrate is removed from the bath and heated so that the base solder and self-assembly solder combine to form a composite alloy which forms the final electrical solder connection between the component and the solder pad on the substrate.
Abstract:
Gegenstand der Erfindung ist eine thermische Überlastschutzvorrichtung (20) zum Schutz eines elektrischen Bauelements (12), insbesondere elektronischen Bauelements, die ein Schaltelement (22) zum Kurzschließen von Anschlüssen (14, 16) des Bauelements (12) oder zum Auftrennen einer elektrisch leitenden Verbindung (24) zwischen mindestens einem der Anschlüsse (14) und einem Stromführungselement (26) der Überlastschutzvorrichtung (20), eine Aktorvorrichtung (28) zum Verlagern des Schaltelements (22) in eine entsprechende Kurzschlussposition oder Trennposition und ein die Aktorvorrichtung (28) thermosensitiv auslösendes und als Separierelement (30) ausgebildetes Auslöseelement aufweist. Es ist vorgesehen, dass die Überlastschutzvorrichtung (20) ein Basiselement (36) aufweist, mit dem das Separierelement (30) verbunden ist, wobei das Basiselement (36) an einer dem Separierelement (30) abgewandten Seite mittels einer Standard-Lotverbindung (38) verlötbar ist. Die Erfindung betrifft weiterhin eine entsprechende Anordnung mit einem Leiterbahnenträger (10), mindestens einem darauf angeordneten Bauelement (12) und mindestens einer zugeordneten Überlastschutzvorrichtung (20) und ein Verfahren zur Herstellung eines Verbunds aus einem Schaltelement (22), einem Basiselement (36) und einem Separierelement (30).
Abstract:
The present invention provides a method for connecting metallic surfaces with a metal- based adhesive film, the method utilizing successive application and heating of two distinct compositions comprising metal or metal alloy powders having different melting points. Further provided is a kit for attaching metallic surfaces, the kit containing two distinct metal-based compositions. Further disclosed is an assembly of two electronic or semiconductor components comprising a continuous metal-based adhesive film there between.
Abstract:
A method for manufacturing an electronic device comprising, a step for providing a wiring board having first and second different regions on one major surface, a first electronic component having a plurality of first bump electrodes on one major surface, and a second electronic component having a plurality of second bump electrodes having a melting point higher than that of the first bump electrode on one major surface, a step for mounting the first electronic component in the first region on one major surface of the wiring board by fusing the plurality of first bump electrodes, and, a step for mounting the second electronic component in the second region on one major surface of the wiring board by thermocompressing the second electronic component under a state where adhesion resin is placed between the second region on one major surface of the wiring board and one major surface of the second electronic component, wherein the step for mounting the second electronic component is performed prior to the step for mounting the first electronic component.
Abstract:
The present invention relates to a printed circuit board assembly (10), said printed circuit board assembly comprising: a substrate (100); two or more electronic components which are categorized, wherein each component is secured to the substrate by securing means having a different predetermined thermal-release temperature, depending on which category said component belongs to. The invention furthermore relates to a method of assembling the printed circuit board assembly and a method of disassembling the printed circuit board assembly according to the invention.
Abstract:
Methods for mounting electrical components (10, 20) on a substrate (40) and securely retaining the components (10, 20) are described. The methods include altering solder paste compositions (50), interposed between component retentive pins (25) and retentive through holes (46), during a reflow process. Electronic assemblies including circuit boards (40) and electrical components (10) mounted thereto are also described. In one of the electronic assembly embodiments (10, 20), materials originally associated with a mounted electrical component (10, 20) migrate in solder paste coupling the electrical components (10, 20) to the circuit board (40).