Abstract:
An electronic module and a method for the production thereof is disclosed. In one embodiment, the electronic module has a plurality of components arranged on a wiring block. The wiring block has a plurality of outer sides and has in its volume lines interconnecting contact pads on the outer sides. The contact pads are electrically connected to component connections of the components.
Abstract:
A printed wiring board is made of first and second substrates superimposed on each other. The first and second substrates respectively include a core layer made of resin containing carbon fibers. The second substrate has the outline different from that of the first substrate. A stepped surface is defined on the front surface at least of the first substrate. Electrodes can be formed on the stepped surface as well as on the back surface of the first substrate and the front surface of the second substrate. This structure enables detection of an electric signal from the stepped surface. A further flexibility can thus be achieved in locating electrodes as compared with a conventional printed wiring board having uniform substrates simply superimposed on each other. This results in an expanded use or purpose for a printed wiring board.
Abstract:
A method of forming a printed circuit card with a metal power plane layer between two photoimageable dielectric layers is provided. Photoformed metal filled vias plated through holes are in the photopatternable material, and signal circuitry is on the surfaces of each of the dielectric materials connected to the vias and plated through holes. A border may be around the card including a metal layer termination in from the edge of one of the dielectric layers. Copper foil with clearance holes is provided. First and second layers of photoimageable curable dielectric material are on opposite sides of the copper. Patterns are developed on the first and second layers of the photoimageable material to reveal the metal layer through vias. Through holes are developed where holes were patterned in both dielectric layers. The surfaces of the photoimageable material, vias and through holes are metallized by copper plating, preferably using photoresist.
Abstract:
A high-density connection of multiple circuit boards having overlapping ends arranged in a stack. The metal traces on the stacked circuit boards are electrically connected by contact of the ends of the traces, which ends may be pads. The stacked circuit boards can be clamped, soldered or bonded together. Multiple circuit boards may be connected to a single circuit board. In one embodiment, double-sided circuit boards are stacked so that a first circuit board connects to a second circuit board through a third circuit board disposed intermediate the first and second circuit boards. The circuit boards may be flexible or rigid.
Abstract:
A ceramic multilayer substrate is formed by vertically stacking and firing a plurality of ceramic sheets, in which a connection bar is vertically formed between internal patterns and an external terminal of each ceramic sheet, preventing metallic conductive layers of the internal patterns from being deformed during processing the external terminal. The ceramic multilayer substrate has pattern layers formed on surfaces of at least some of the ceramic sheets. At least one through hole is formed on the edges of the stacked ceramic sheets so as to be opened to the outside. An external terminal is formed on an inner wall of the through hole connected with the pattern layers, and directly contacting the connection bar, whereby the connection bar supports the electrical connection between the external terminal and the pattern layers.
Abstract:
A signal processing module can be manufactured from a plurality of composite substrate layers, each substrate layer includes elements of multiple individual processing modules. Surfaces of the layers are selectively metalicized to form signal processing elements when the substrate layers are fusion bonded in a stacked arrangement. Prior to bonding, the substrate layers are milled to form gaps located at regions between the processing modules. Prior to bonding, the leads are positioned such that they extend from signal coupling points on said metalicized surfaces into the gap regions. The substrate layers are then fusion bonded to each other such that the plurality of substrate layers form signal processing modules with leads that extend from an interior of the modules into the gap areas. The individual modules may then be separated by milling the substrate layers to de-panel the modules.
Abstract:
Multilayer expansion card for connecting an apparatus or device to an electronic apparatus, particularly for association to a mother card (15) of a Personal Computer. The card comprises a first part (12), intended principally for connection, having a thickness coherent with the requirements of size for connection to the standard slots (14) of the mother card (15), and a second part (13), intended principally for the management of the card functions and for processing, and hence the electronics, having a greater thickness with respect to the first part (12) in order to contain a correspondingly greater number of layers (11, 16) intended for the management of a high density of electronic-type signals.
Abstract:
Disclosed are stair stepped PCB structures which provide high performance, direct path, via-less interconnections between various elements of an electronic interconnection structure including, among others, IC packages and connectors.
Abstract:
Disclosed are a ceramic multilayer substrate formed by vertically stacking and firing a plurality of ceramic substrates, in which a connection bar is longitudinally formed on connection areas between internal patterns and an external terminal of each ceramic substrate, thereby preventing metallic conductive layers of the internal patterns from being deformed during processing the external terminal and stably connecting the internal patterns to the external terminal, and a method for manufacturing the substrate. The ceramic multilayer substrate comprises pattern layers formed on surfaces of parts or all of the ceramic substrates so as to form designated circuit elements; connection bars longitudinally formed in the ceramic substrates within a part of the pattern layers extended to the edges of the ceramic substrates so as to exchange signals with the outside; at least one through hole being formed on the edges of the stacked ceramic substrates so as to be opened to the outside and exposing the connection bar; and an external terminal formed on an inner wall of the through hole.
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.