Abstract:
An electronic device comprises a flexible, printed circuit board having an electrically conductive layer (2) on one side of the flexible board, and a conductive metallic stiffener (8) which is attached to the flexible board. Said conductive layer (2) is conductively connected to the metallic stiffener (8) by means of solder. The flexible board is provided with a through-hole (10), the solder connecting the metallic stiffener (8) with the conductive layer (2) being present in said through-hole (10).
Abstract:
According to a process for producing a thermal layout, not only massive heat sinks are provided for absorbing heat, but also an optimized number of thermoconductive strips which distribute the heat over the printed circuit board. In the collecting zones are arranged higher capacity sinks into which the heat is transmitted. The thermoconductive strips may be thermoconductors (TL) provided for that purpose and more massive than the conductive strips for the electric connections, or conductive strips for electric connections, the electroconductors (EL), may also be used for heat transfer. An optimum design interconnects the TL'S and EL's into a functional whole, a thermal management network. With a certain technique, which could be called pocket groove technique, "cooling channels" of a type may be created. Such thermoconductors may be included in the electric layout, so that a thermal layout is superimposed on the connection layout (TL/EL network). Heat distribution and transfer may thus be calculated and optimized by a computer in the same way as the electric distribution by the conductive strips, i.e. the known electric layout, which is produced by a computer-assisted process.
Abstract:
Ein Verfahren zur Herstellung zumindest einer elektrisch leitenden Verbindung (6a, 6b, 6c) in einem Schaltungsträger (1), der eine Aluminiumbasisschicht (2), eine darüber angeordnete Isolierschicht (3) sowie eine auf der Isolierschicht angeordnete Leiterbahnstruktur (4) aufweist, wobei die elektrisch leitende Verbindung zwischen der Aluminiumbasisschicht und zumindest einer Leiterbahn (4a, 4b, 4c) der Leiterbahnstruktur (4) hergestellt wird, wobei zumindest eine Bohrung (5a, 5b, 5c) hergestellt wird, welche die Leiterbahn (4a, 4b, 4c) und die Isolierschicht (3) durchsetzt und zumindest bis zu der Aluminiumbasisschicht (2) reicht und zur Herstellung der zumindest einen elektrisch leitenden Verbindung (6a, 6b, 6c) diese Bohrung mit einem elektrisch leitfähigen Stoff gefüllt wird, welcher daraufhin einem Verfestigungsprozess unterworfen wird, sowie ein dementsprechend ausgebildeter Schaltungsträger.
Abstract:
A structure is disclosed for connecting an electrically-connectable metal stiffener (402) to a ground connection within a flexible substrate (102), the stiffener comprising nickel-gold plated stainless steel. In one embodiment the stiffener is secured to the flexible substrate by a non- conducting adhesive (110) which includes an opening over a ground connection, the adhesive opening being filled by a conductive epoxy (302). A sequence for applying the disclosed materials discloses a method for attaching the stiffening structure to the flexible substrate.
Abstract:
A structure is disclosed for connecting an electrically-connectable metal stiffener to a ground connection within a flexible substrate, the stiffener comprising nickel-gold plated stainless steel. In one embodiment the stiffener is secured to the flexible substrate by a non-conducting adhesive which includes an opening over a ground connection, the adhesive opening being filled by a conductive epoxy. A sequence for applying the disclosed materials discloses a method for attaching the stiffening structure to the flexible substrate.
Abstract:
Provided is a process for creating vias for a circuit assembly including the steps of (a) applying a curable coating composition to a substrate, some or all of which is electrically conductive, to form an uncured coating thereon; (b) applying a resist over the uncured coating; (c) imaging the resist in predetermined locations; (d) developing the resist to expose predetermined areas of the uncured coating; (e) removing the exposed areas of the uncured coating; and (f) heating the coated substrate of step (e) to a temperature and for a time sufficient to cure the coating. Also disclosed is a process of fabricating a circuit assembly.
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:
Adhesive material is applied to a surface of a metallic core layer. The adhesive material is removed from a conductive region of the metallic core layer. A metallic contact is provided over the conductive region of the metallic core layer. The metallic core layer is laminated to an imprinted buildup layer, the buildup layer having a dielectric region and a conductive region, wherein a nonconductive region of the metallic core layer is bonded to the dielectric region of the buildup layer and the conductive region of the metallic core layer is bonded to the conductive region of the imprinted-buildup layer.