Abstract:
A sub-component circuit board may be electrically and mechanically connected to a higher order circuit board using one or more leads extending from a lead frame embedded in the sub-component circuit board. The sub-component board is produced as a layered assembly with the embedded lead frame at the core. One or more dielectric layers and one or more circuitry layers are provided over the lead frame and then bonded using heat and pressure. Apertures in the dielectric and circuitry layers define a perimeter of the circuit board where the leads of the lead frame are exposed. The lead frame connects to the circuitry layer(s) using plated vias.
Abstract:
A casing of an electronic key transmitting and receiving apparatus is formed to seal entire bodies of circuit parts, a mounting face of a printed board, on which the circuit parts are mounted, and parts of terminals while the other parts of the terminals are exposed. A rear face of the printed board opposite from the mounting face provides a part of an outer surface of the casing. When the printed board is provided in the casing through an insert molding process, the printed board is held in a cavity of a molding die such that the rear face of the printed board closely contacts an inner face of the cavity. Accordingly, deformation of the printed board due to pressure caused when the resin is poured or when the resin hardens is inhibited.
Abstract:
A multilayer printed circuit board (PCB) interface includes a top PCB layer, a middle PCB layer, and a bottom PCB layer. A top surface of the top PCB layer receives at least one top module. The middle PCB layer includes an electrically conductive layer disposed between two dielectric layers. The electrically conductive layer forms a plurality of connectors protruding horizontally from the sides of the multilayer PCB to couple the PCB interface to a main board. A bottom surface of the bottom PCB layer receives at least one bottom module.
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:
An overmolded electronic assembly (10) and method for forming the assembly (1) that entails enclosing a circuit board (12) having one or more circuit devices (16) mounted to its surface. The assembly (10) includes a heat-conductive member (18) in thermal contact with one or more of the circuit devices (16) mounted to the circuit board (12). An overmolded body (22) encloses the circuit board (12) and the circuit devices (16) with the heat-conductive member (18), such that the overmolded body (22) and heat-conductive member (18) form a moisture-impermeable seal around the circuit board (12) and circuit devices (16). The overmolded body (22) also includes a connector housing (28) integrally-formed in its outer surface. The method for manufacturing the overmolded electronic assembly (10) generally entails supporting the circuit board (12) with the heat-conductive member (18) such that the heat-conductive member (18) thermally contacts the circuit devices (16). An overmolded enclosure is then formed by molding a material over the surface of the circuit board (12) to form the overmolded body (22) that, with the heat-conductive member (18), encases the circuit board (12) and its circuit devices (16).
Abstract:
An overmolded electronic assembly (10) and method for forming the assembly (1) that entails enclosing a circuit board (12) having one or more circuit devices (16) mounted to its surface. The assembly (10) includes a heat-conductive member (18) in thermal contact with one or more of the circuit devices (16) mounted to the circuit board (12). An overmolded body (22) encloses the circuit board (12) and the circuit devices (16) with the heat-conductive member (18), such that the overmolded body (22) and heat-conductive member (18) form a moisture-impermeable seal around the circuit board (12) and circuit devices (16). The overmolded body (22) also includes a connector housing (28) integrally-formed in its outer surface. The method for manufacturing the overmolded electronic assembly (10) generally entails supporting the circuit board (12) with the heat-conductive member (18) such that the heat-conductive member (18) thermally contacts the circuit devices (16). An overmolded enclosure is then formed by molding a material over the surface of the circuit board (12) to form the overmolded body (22) that, with the heat-conductive member (18), encases the circuit board (12) and its circuit devices (16).
Abstract:
An integrated circuit package, and a method for forming the integrated circuit package, including a single layer or multilayer substrate in which interconnection vias are formed is described. Laser energy is swept across a surface of a mask in which holes have been formed. Laser energy passing through the holes of the mask forms vias in a substrate held in place below the mask. The laser energy is swept at such a speed and is maintained at such an energy level that the laser energy forms vias in the substrate, but does not penetrate a set of leads attached to the substrate. Vias may be formed in this way by either a mask imaging, contact mask or conformal mask technique. The laser energy is emitted from a non-thermal (e.g., excimer) laser. The substrate is formed of an organic (e.g., epoxy) resin. The resin may include reinforcing fibers (e.g., aramid fibers). Substrates may be formed on one or both sides of the set of leads. After formation in the substrate, the vias are coated with an electrically conductive material. The method of via formation is fast, inexpensive, achieves higher via density, and avoids overheating of the substrate.
Abstract:
A flexible multi-layer circuit wiring board which is capable of constituting finger lead-like terminals that are little liable to be deformed even when the circuit conductors protruding like finger leads are finely formed and is capable of maintaining good flexibility at a bent portion. Circuit conductors 2 composed of an electrically conducting metal having a large Young's modulus are disposed at the ends of one surface of a flexible insulating base member 1 to form finger lead-like terminals 3, required circuit wiring conductors 4 composed of an electrically conducting metal rich in flexibility are disposed on the other surface of the flexible insulating base member 1 inclusive of a bent portion A of the circuit wiring board, and through-hole connection portions 5 are formed to electrically connect required portions of the circuit conductors 2 and the circuit wiring conductors 4.
Abstract:
A method for manufacturing a circuit board with a plurality of conductive terminal pins includes the steps of: providing a bed with an array of receiving holes formed therein; providing the bed on a vibrating apparatus; placing a plurality of conductive terminal pins on the bed, each of the terminal pins having a shank and an enlarged head; operating the vibrating apparatus to permit insertion of the shank of each of the terminal pins into a respective one of the receiving holes, the enlarged heads of the terminal pins being sized to prevent extension thereof in the respective one of the receiving holes; providing a fiber glass reinforcing plate formed with an array of through-holes; providing a fiber glass circuit board body having a bottom side formed with an array of connectors; superimposing the reinforcing plate and the circuit board body on the bed such that each of the connectors of the circuit board body and the heads of the terminal pins extend in a corresponding one of the through-holes and abut against each other; and heating the bed, the reinforcing plate and the circuit board body under pressure so as to provide a firm bond between the reinforcing plate and the circuit board body and between each of the connectors and the head of a corresponding one of the terminal pins.
Abstract:
An integrated circuit package, and a method for forming the integrated circuit package, including a single layer or multilayer substrate in which interconnection vias are formed is described. Laser energy is swept across a surface of a mask in which holes have been formed. Laser energy passing through the holes of the mask forms vias in a substrate held in place below the mask. The laser energy is swept at such a speed and is maintained at such an energy level that the laser energy forms vias in the substrate, but does not penetrate a set of leads attached to the substrate. Vias may be formed in this way by either a mask imaging, contact mask or conformal mask technique. The laser energy is emitted from a non-thermal (e.g., excimer) laser. The substrate is formed of an organic (e.g., epoxy) resin. The resin may include reinforcing fibers (e.g., aramid fibers). Substrates may be formed on one or both sides of the set of leads. After formation in the substrate, the vias are coated with an electrically conductive material. The method of via formation is fast, inexpensive, achieves higher via density, and avoids overheating of the substrate.