Abstract:
Techniques and mechanisms to provide a compact arrangement of vias extending through at least a portion of a printed circuit board (PCB) or other substrate. In an embodiment, the substrate includes a dielectric material and a sidewall structure forming a hole region that extends at least partially through the dielectric material. The hole region adjoins each of a first via and a second via, and is also located between the first via and second via. In another embodiment, the first via is coupled to exchange a first signal of a differential signal pair, and the second via is coupled to exchange a second signal of the same differential signal pair.
Abstract:
According to exemplary embodiments, a controlled-depth slot extending into a circuit board is provided. The controlled depth slot may be milled, and may comprise ½ radial plated through-holes to generate a solderable "D" interconnect feature. The slot may include interconnect features on one to five sides. According to another exemplary embodiment, a circuit board having a depth-controlled interconnect slot is provided in conjunction with one or more solderable technology modules. The one or more solderable technology modules may include memory devices, power devices such as Point of Load Supplies (POLS), security devices and anti-tamper devices, capacitance devices, and other types of chips such as Field Programmable Gate Arrays (FPGAs). The solderable technology modules may be soldered into the slot to secure the modules in the slot and connect the modules to interconnects on the circuit board.
Abstract:
A design for a Z-directed component for insertion into a printed circuit board while allowing electrical connection to internal conductive planes contained with the PCB. In one embodiment the Z-directed component is mounted within the thickness of the PCB allowing other components to be mounted over it. The body may contain one or more conductors and may include one or more surface channels or wells extending along at least a portion of the length of the body. Z-directed components include high frequency signal pass throughs, capacitors, diodes, transistors, transmission lines, delay lines. Methods for mounting Z-directed components are also provided.
Abstract:
A printed circuit board (20) includes a sub-assembly having dielectric (22) and conductive layers (24). A hole (26) extends into the sub-assembly. Metal plating (32) is applied on a barrel (27) of the hole (26). A conductive layer (32) and an etch resist (34) are applied to a first photoresist (30) on the hole barrel (27). The first photoresist (30) is removed and a second photoresist (36) is applied leaving areas to be controlled depth etched exposed. The exposed areas (38) are chemically etched. The second layer of photoresist (36) is removed and a second chemical etch operation is performed to define previously plated features (40) on the sub-assembly (20). The etch resist (34) is then removed.
Abstract:
A miniature PWB (101) with features that incorporate the required circuitry changes and component footprints (105), which has been enhanced with micro-castellations (111) such as those found on ceramic surface mount packages. The miniature PWB (101) is mounted on the circuit board (125) using techniques well known in the art. This combination of technologies provides an adaptable, durable interconnect methodology, which allows for circuit (109) and part changes (113, 115, 117) without changing the layout of the base printed wiring board (125).
Abstract:
Das Herstellungsverfahren kann unter anderem zur Herstellung von Solarmodulen verwendet werden, in denen die einzelnen Solarzellen elektrisch in Serie geschaltet werden. Dabei wird in einem Halbleiterschichtaufbau enthaltend einen p-n-Übergang mindestens eine Vertiefung (10) erzeugt, und auf einen die Vertiefung (10) enthaltenden Substratabschnitt eine elektrisch leitfähige Substanz (Al) in im wesentlichen gerichteter Weise abgeschieden, wobei die sich über einen Raumwinkel erstreckenden Abscheidungsrichtungen derart schräggestellt ist, dass innerhalb der Vertiefung (10) nur ein Wandabschnitt von der elektrisch leitfähigen Substanz bedeckt wird und somit die vorderseitige Elektrodenschicht (6) einer Solarzelle mit der rückseitigen Elektrodenschicht (11) einer dazu benachbarten Solarzelle elektrisch kontaktiert wird. Mit dem Verfahren können auch Metallisierungsebenen von Mehrlagenleiterplatten elektrisch untereinander kontaktiert werden.
Abstract:
An interconnection circuit and related techniques are described. The interconnection circuit (10) includes a plated through hole (26) having a plurality of electrically isolated segments (26a, 26b) with at least one of the plurality of electrically isolated segments (26a) coupled to a signal path (27a, 27b) and at least one of the electrically isolated segments (26b) coupled to the ground (12). With this arrangement, the circuit provides a signal path between a first and a second different layers of a multilayer. By providing one segment (26a) as a signal segment and another segment (26b) as a ground segment the size and shape of the electrically isolated segments (26a, 26b) can be selected to provide the interconnection circuit having a predetermined impedance characteristic. The interconnection circuit can thus be impedance matched to circuit board circuits, devices and transmission lines, such as striplines, microstrips and co-planar waveguides. This results in an interconnection circuit which maintains the integrity of relatively high-frequency signals propagating through the interconnection circuit from the first layer to the second layer. The interconnect circuits can be formed by creating distinct conductor paths (26a, 26b) within the cylindrical plated through-holes (26) using variety of manufacturing techniques including, but not limited to, broaching techniques, electrostatic discharge milling (EDM) techniques and laser etching techniques.
Abstract:
A printed circuit board (10) includes at least one via (40) providing a conductive path through the printed circuit board (10). The via (40) comprises at least one axially extending conductive strip (120) formed by cutting material from a metal barrel (42) lining the interior wall of the via (40).