Abstract:
Die Erfindung bezieht sich auf ein Verfahren zum Herstellen einer mit elektrischen Bauelementen bestückten Leiterplatte, bei dem die Leiterbahnen mit einem Lötstoplack bedruckt werden, die Bauelemente einsetzen und verlöten und anschließend die von den Bauelementen freie Seite mit einer Isolierlackschicht überzogen wird. Um das Verfahren vergleichsweise einfach ausführen zu können und eine hohe Isolatiosnfestigkeit zwischen den Leiterbahnen zu erreichen, erfolgt anstelle des Überziehens mit der Isolierlackschicht ein weiteres Bedrucken der Leiterbahnen (2) mit dem Lötsto plack. Das Verfahren ist zum Herstellen beliebiger Leiterplat ten geeignet.
Abstract:
Die Erfindung betrifft eine im Siebdruck verarbeitete Zusammensetzung mit einem Gehalt an einem epoxidierten Novolak, einem Phenoxypolymeren, einem flüssigen Anhydrid, kolloidalem Siliciumdioxid und einem Verdünnungsmittel. Die Zusammensetzung wird zur Beschichtung von Unterlagen, beispielsweise von gedruckten Schaltkarten, verwendet und dient als Lötmaske und Schutzüberzug.
Abstract:
A circuit board layer (2) in accordance with the present invention includes a conductive sheet (4) sandwiched between an insulating top layer (10) and an insulating bottom layer (14). The top and bottom layers (10) and (14) and the conductive sheet (4) define the circuit board layer (2) having an edge that includes an edge (20) of the conductive sheet (4). An insulating edge layer (18) covers substantially all of the edge (20) of the conductive sheet (4).
Abstract:
A circuitized substrate (11) comprised of at least one dielectric material (13) having an electrically conductive pattern thereon. At least part of the pattern is used as the first layer of an organic memory device (35) which further includes at least a second dielectric layer over the pattern and a second pattern aligned with respect to the lower part for achieving several points of contact to thus form the device. The substrate (11) is preferably combined with other dielectric-circuit layered assemblies to form a multilayered substrate on which can be positioned discrete electronic components (e.g., a logic chip) coupled to the internal memory device to work in combination therewith. An electrical assembly (71) capable of using the substrate is also provided, as is an information handling system (101) adapted for using one or more such electrical assemblies as part thereof.
Abstract:
The present invention provides a glass fiber product having particles adhered to at least one fiber of the product, where the size and amount of particles is effective to reduce the tackiness of the glass fiber product and optionally effective to reduce interfilament bonding, and composition, and method for forming the same.
Abstract:
A circuit board layer (2) in accordance with the present invention includes a conductive sheet (4) sandwiched between an insulating top layer (10) and an insulating bottom layer (14). The top and bottom layers (10) and (14) and the conductive sheet (4) define the circuit board layer (2) having an edge that includes an edge (20) of the conductive sheet (4). An insulating edge layer (18) covers substantially all of the edge (20) of the conductive sheet (4).
Abstract:
An improved interposer for use in forming an electrical connection between electrical components. The interposer includes a bi-lobate contact pad made of an elastomeric material embedded with conductive metallic granules.
Abstract:
The present invention provides an electronic support (210) comprising: (A) a prepeg layer (214) comprising: (1) at least one reinforcement material (220); (2) at least one matrix material (216) in contact with at least a portion of the at least one reinforcement material (220); and (B) at least one layer (217) in contact with at least a portion (224) of at least one surface of the prepeg layer (214), the at least one layer (217) comprising at least one inorganic filler (218) and not greater than 25 weight percent of adhesive materials based on the total weight of at least one layer (217) on a total solids basis.
Abstract:
The invention is directed to a process for patterning ceramic tape wherein a photoresist is applied to a ceramic tape, which enables the photoresist, after being exposed patternwise, and developed, to act as a development mask for the tape. The tape then undergoes a development stage, which ultimately removes undesired sections of tape. The tape contains polymeric binder(s) with acidic or alkaline functional pendant groups but not photosensitive ingredients. Therefore, the tape is aqueous processable but itself cannot be photoimaged. However, when this tape is used with conventional photoresists that have the development chemistry opposite from that of the tape, it allows the photoresist to be used as a development barrier layer for the tape.