Abstract:
A conductive line is applied to a substrate by aligning the conductive line in juxtaposition with a selected area of the substrate; bonding the conductive line to the substrate; and detaching the conductive line from a carrier in which the conductive line is suspended. The carrier has a carrier opening defined by sidewalls, and conductive material is suspended by the sidewalls of the carrier opening so as to be embedded within the carrier opening, and form the conductive line.
Abstract:
A flexibly configurable power distribution center in which an electrical signal or power is routed by implementing an electrical interconnection at any point along a path of a conductor. Insulative portions or boards within an electrical power distribution center are fabricated having a plurality of recesses for receiving electrical conductors therein. The electrical conductors are in the form of flexibly configurable strips of metal such as steel, copper, brass or the like, which are disposed within the recesses in the insulating portions. The strips of metal are dimensioned and disposed within the recesses forming an exposed conductive ridge which is mechanically and electrically engageable by interface terminals along substantially the entire length of the conductor. The interface terminals have at least one female mating portion for mechanically mating with the conductive ridge to establish electrical continuity therewith. A plurality of recesses can be configured within the insulating portions, and the metal strip can be disposed within selected recesses or portions of recesses as desired to provide various alternative conductive trace configurations with the same insulative portion. The strip metal is cut to desired lengths for automated or manual installation within the selected recesses.
Abstract:
A conductive line is applied to a substrate by aligning the conductive line in juxtaposition with a selected area of the substrate; bonding the conductive line to the substrate; and detaching the conductive line from a carrier in which the conductive line is suspended. The carrier has a carrier opening defined by sidewalls, and conductive material is suspended by the sidewalls of the carrier opening so as to be embedded within the carrier opening, and form the conductive line.
Abstract:
A thick film hybrid arrangement has a plurality of ceramic foils provided with conductor paths and superimposed over one another, a support for supporting the ceramic foils, and a plurality of thin metal lugs located between the ceramic foils for contacting the conducting paths. The metal lugs extend outwardly beyond at least the ceramics foils so as to form outer contacts.
Abstract:
Method of mounting refined contact surfaces on a substrate and substrate provided with such contact surfaces.A method for mounting contact surface elements on the ends of strip conductors along the edge of a substrate. A solder mixed with adhesive is applied to the soldering surface at ends of the strip conductors. Contact surfaces each having a refined, f.i. gold plated, top surface and an activated, f.i. tin plated, bottom surface, are placed respectively on each soldering surface. Heat is applied to melt the solder particles and provide a good electrical connection between each surface contact and strip conductor. The substrate mounted with the contact elements has a plurality of components mounted on one surface thereof and interconnected by the strip conductors. The substrate is adapted to be plugged into an edge connector along its edge with the mounted contact surface elements.
Abstract:
A printed circuit assembly includes surface mounted circuit components held in place on a printed circuit board by a rigid connection. The outwardly extending leads of the circuit component are bonded to conductive areas of the board by an electrically conducting flexible adhesive. The combination of a rigid mechanical connection between the body portion of the circuit component and the board and a flexible, electrically conductive connection between each lead end and the board provides an arrangement capable of withstanding shock loading, as well as vibrational and bending forces to which the assembly might be subjected. The assembly lends itself to relatively inexpensive circuit boards produced by printing techniques, typically including applied metal buses that serve as low resistance shunts to the power connections of the circuit components.
Abstract:
A drop-in module in an RF frequency amplifier circuit is illustrated having space feedback between the gate and drain terminals, and having a unique mounting technique for electrically connecting the source terminals to the ground plane on the opposite side of the substrate portion of the drop-in module. The electrical connection is accomplished by using a U-shaped piece of strap metal, which is inserted in two slots with the legs or tabs of the U-shaped strap metal being bent over to be soldered to the source leads, while the bit portion of the U-shaped member is soldered to the ground plane on the opposite side of the substrate. This allows easy attachment and removal of the FET to the exposed electric circuitry, while still maintaining a definable and appropriate low impedance electrical path from the source leads to the ground plane.
Abstract:
Contact pads (18) of a device (12) are adapted for bonding components such as contacts of a circuit assembly thereto. At least two of the pads (18) are interconnected with a member (34) containing bonding material. Portions of the member (34) lying adjacent the pads (18) are then removed to form isolated bodies (42) containing bonding material on the pads (18). The member (37) may be of a composite structure containing bonding material associated with a hard element (61). The bodies (42) formed therefrom contain a hard element portion (62) having dimensions which remain substantially unchanged to define a desired minimum distance between respective pads (18) and contacts when they are bonded together.
Abstract:
A row of connectors 14 is assembled on a printed circuit board 11 by inserting a leg section 41 of each terminal 14 into a mounting aperture 32 and bending a flat contact portion 42 of each terminal 14 to fit into a pocket 47 formed in the surface of the board. Printed circuit conductors 13 are next screened onto the board 11 with a portion of the conductors positioned over some of the contact portions 42 of terminals 14 to provide edge connections for the printed circuits 12. Metal strips conductors 13 are then fastened to the board 11 and end portions thereof are welded to the contact portions 42 of other terminals 14 to provide edge connections for the metal strips conductors 13.
Abstract:
In a thermocompressive soldering process, a conductive overlay of a material such as gold is applied to a contact finger of a circuit board.In carrying out this process, the overlay is initially carried on an adhesively coated strip such as a polyimide tape. To transfer the overlay to the contact finger, it is aligned with the contact finger and temporarily attached to the circuit board. A heat conductive resilient sheet is then interposed between the circuit board and a thermode. The thermode is adjusted to engage the contact finger with a predetermined force. The force is resiliently distributed by the interposed sheet. Heat is then applied from the thermode through the resilient sheet to liquefy a solder coating on the overlay and to bond the overlay to the contact finger upon resolidification of the solder. The applied force is sustained during the application of head and during a subsequent cooling period during which the solder resolidifies. The resilient sheet minimizes seepage of solder to the top surface of the overlay and thereby prevents contamination of such surface by the solder.