Abstract:
The process for producing subsequently contactable contact points between two conductive track planes on a circuit substrate separated by an electrically insulating layer makes it possible to produce, for example, a basic conductor pattern which can subsequently be easily adapted to requirements. By laying windows in the conductive track planes out in such a way that, when the electrically insulating layer is subsequently through-etched due to under-etching, rod-like parts connected to the aperture periphery are revealed between or in the apertures which can be brought into contact with electrically conductive parts of the other conductive track plane, these conductive tracks can be electrically interconnected by mechanical bending.
Abstract:
A unique housing (104 and 600) of a portable radio transceiver (100) that takes advantage of the heat sinking, electrical shielding and structural characteristics of a battery. The unique electronic circuitry housing (104 and 600) includes a battery as an integral structural element thereof. In one illustrated housing (104), a stick battery (210) is attached to the side of a transmitter printed circuit panel (213). A logic printed circuit panel (212) and a receiver printed circuit panel (214) are positioned above and below the transmitter printed circuit panel (213), respectively, and are held together by interlocking side rails (206, 207). In a second illustrated housing (600), a flat battery (602) is attached to the sides of a first U-shaped printed circuit panel (604). A second U-shaped printed circuit panel (606) is positioned between the battery and the first panel (604). Heat dissipated by the electrical components on the second panel (606) is conducted away by the flat battery (602). The electronic circuitry housing of the present invention may be advantageously utilized in a variety of applications where electronic circuitry is operated from a battery.
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 wired circuit board has a metal supporting board (2), an insulating layer (3) formed on the metal supporting board, a conductive pattern (4) formed on the insulating layer and having a pair of wires (9a,9b) arranged in spaced-apart relation, and a semiconductive layer (5) formed on the insulating layer (3) and electrically connected to the metal supporting board (2) and the conductive pattern (4). The conductive pattern has a first region (14) in which a distance (D1) between the pair of wires is small and a second region (15) in which the distance (D2) between the pair of wires is larger than that in the first region. The semiconductive layer (5) is provided in the second region (15).
Abstract:
A wired circuit board has a metal supporting board, an insulating base layer formed on the metal supporting board, a conductive pattern formed on the insulating base layer and including at least one pair of wires arranged in mutually spaced-apart and opposed relation having different potentials, a semiconductive layer formed on the insulating base layer to cover the conductive pattern and electrically connected to the metal supporting board on one side outside a region where the pair of wires are opposed, and an insulating cover layer formed on the semiconductive layer.
Abstract:
A multilayered circuit board for a semiconductor chip module includes an underlying board, insulating layers, fixed-potential wiring layers, via holes, and metal layers. The underlying board has a major surface made of a metal material to which a fixed potential is applied. The insulating layers are stacked on the major surface of the underlying board and have wiring layers formed on their surfaces. The fixed-potential wiring layers constitute part of the wiring layers formed on the insulating layers. The via holes are formed below the fixed-potential wiring layers to extend through the insulating layers. The metal layers are filled in the via holes so as to make upper ends be connected to the lower surfaces of the fixed-potential wiring layers. One of the insulating layers in contact with the major surface of the underlying board is formed on the underlying board while the lower end of the metal layer is in contact with the major surface of the underlying board. The other insulating layer formed on the insulating layer in contact with the major surface of the underlying board is stacked while the lower end of the metal layer is in contact with the upper surface of the fixed-potential wiring layer of one insulating layer.
Abstract:
Provided is a process for forming metallized vias in a substrate including the steps of (I) applying to an electroconductive substrate an electrodepositable coating composition onto all exposed surfaces of the substrate to form a conformal dielectric coating; (II) ablating a surface of the dielectric coating to expose a section of the substrate; (III) applying a layer of metal to all surfaces to form metallized vias in the substrate. Also disclosed are processes for fabricating a circuit assembly which include the application of an electrodoepositable coating composition onto exposed surfaces of the substrate/core to form a conformal dielectric coating thereon. The electrodepositable coating composition includes a resinous phase dispersed in an aqueous phase, where the resinous phase has a covalently bonded halogen content of at least 1 percent by weight. The dielectric coating derived therefrom has a low dielectric constant and low dielectric loss factor.
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 ground connector assembly (20) having a substrate (22) and a ground member (24). The substrate (22) is used to retain an electrical circuit and has a ground region (34), a ground hole (30), and at least one strain relief slot (32). The ground member (24) is attached within the ground hole (30). The ground region (34) surrounds the ground hole (30) and is at least partially interposed between the ground hole (30) and the strain relief slot (32). The ground connector assembly (20) may further include a conductive ring (42), such as a copper ring, surrounding the ground hole (30) and attached to the ground region (34). There is also a method of making the ground connector assembly (20).