Abstract:
An optical transceiver module having aplurality of optical subassemblies (1001 and a printed circuit board (150) is disclosed The transceiver module includes lead frame connectors (12,22) for connecting the optical subassemblies to the printed circuit board The lead frame connectors include a stamped and bent conductive lead structure (30) that is encased in an insert injection molded plastic casing (32) The plastic casing provides electrical insulation for the conductors in the lead frame as well as mechanical support for the finished component The lead frame connectors connect to the leads associated with the optical subassemblies and are surface mounte onto the printed circuit board to establish connectivity betwedn the optical subassembly and the printed circuit board The lead frame assemblies are generally more reliable and less expensive than using flexible printed circuit board structures to establish electrical connectivity between optical subassemblies and transceiver printed circuit boards
Abstract:
A method for manufacturing a wiring board comprising an insulating member, comprising: a penetrating hole formation process of forming a penetrating hole in the insulating member; a placement process of inserting a conductive connecting particle into the penetrating hole; a connecting particle pressing process of disposing the conductive layers on both surfaces of the insulating member, pressing the conductive layers toward the connecting particle in the penetrating hole, and deforming the connecting particle in the pressing direction to obtain the connecting member; and a patterning process of patterning the conductive layers, wherein, in the connecting particle pressing process, the pressing is performed such that the cross-sectional area in the direction along the insulating member surface of at least a portion of the connecting member is greater than the contact area of the connecting member with the conductive layers.
Abstract:
The present invention provides a conductive paste comprising flake conductive fillers having a 99% cumulative particle size of 25 µm or less and a binder resin as essential components. The flake conductive fillers are metal particles having a silver-copper alloy surface layer. The conductive paste according to the present invention is fused with a part of a copper foil circuit to which the conductive paste is to be connected during connection by heating and pressurization, and has high electrical conductivity and high fill ration in a via hole. Thus, the conductive paste according to the present invention provides a multilayer printed wiring board that has high reliability of connection and excellent interlayer connection.
Abstract:
The present invention relates to a multi-layer printed circuit board comprising a core substrate (30) having through holes (36); and an interlayer resin insulating layer (40) built up on said core substrate, wherein said through holes are constituted by filling a first metal layer (24) formed by electroplating, a metal film formed by electroless plating, sputtering or evaporation and a second metal layer (32) formed by electroplating.
Abstract:
A multi-layer printed circuit board comprising, placed one upon another, a plurality of laminating double-side circuit board and a plurality of interlayer connecting prepregs, wherein a via hole extending from a conductor circuit side on one surface of the laminating double-side circuit board up to the conductor circuit on the other surface is provided and is filled with a conductive substance to mutually connect conductor circuits on the opposite surfaces of the laminating double-side circuit board, a pad portion of a laminating double-side circuit board and a pad portion of another laminating double-side circuit board are stacked via an interlayer connecting prepreg so as to allow a conductive substance-filled through hole in the interlayer connecting prepreg to face the pad portions, thereby electrically connecting the pad portions on the surfaces of the laminating double-side circuit boards. Accordingly, multi-layer printed circuit board excellent in connecproduction time.
Abstract:
A method and apparatus for testing unpackaged semiconductor dice includes a mother board (10) and a plurality of interconnects (12) mounted on the mother board (10) and adapted to establish a temporary electrical connection with the dice (14). The interconnects (12) can be formed with a silicon substrate (20) and raised contact members (16) for contacting the bond pads (22) of a die (14). Alternately the interconnects (16) can be formed with micro bump contact members (16) mounted on an insulating film (74). The mother board (10) allows each die (14) to be tested separately for speed and functionality and to also be burn-in tested in parallel using standard burn-in ovens. In an alternate embodiment testing is performed using a mother board/daughter board arrangement. Each daughter board (82) includes interconnects (12) that allow the dice (14) to be tested individually for speed and functionality. Multiple daughter boards (82) can then be mounted to the mother board (10) for burn-in testing using standard burn-in ovens.
Abstract:
A method for manufacturing a wiring board comprising an insulating member, comprising: a penetrating hole formation process of forming a penetrating hole in the insulating member; a placement process of inserting a conductive connecting particle into the penetrating hole; a connecting particle pressing process of disposing the conductive layers on both surfaces of the insulating member, pressing the conductive layers toward the connecting particle in the penetrating hole, and deforming the connecting particle in the pressing direction to obtain the connecting member; and a patterning process of patterning the conductive layers, wherein, in the connecting particle pressing process, the pressing is performed such that the cross-sectional area in the direction along the insulating member surface of at least a portion of the connecting member is greater than the contact area of the connecting member with the conductive layers.
Abstract:
A method and apparatus for testing unpackaged semiconductor dice includes a mother board (10) and a plurality of interconnects (12) mounted on the mother board (10) and adapted to establish a temporary electrical connection with the dice (14). The interconnects (12) can be formed with a silicon substrate (20) and raised contact members (16) for contacting the bond pads (22) of a die (14). Alternately the interconnects (16) can be formed with micro bump contact members (16) mounted on an insulating film (74). The mother board (10) allows each die (14) to be tested separately for speed and functionality and to also be burn-in tested in parallel using standard burn-in ovens. In an alternate embodiment testing is performed using a mother board/daughter board arrangement. Each daughter board (82) includes interconnects (12) that allow the dice (14) to be tested individually for speed and functionality. Multiple daughter boards (82) can then be mounted to the mother board (10) for burn-in testing using standard burn-in ovens.
Abstract:
A printed circuit board and a method for manufacturing the same that facilitates the formation of an upper surface pattern and prevents a lower surface metal foil from being damaged when forming a blind via hole with a laser is provided. A lower surface and an upper surface of an insulative substrate (5) are respectively coated with a lower surface metal foil (220) and an upper surface metal foil (210), the thickness of which is less than that of the lower surface metal foil (220). Next, an opening (213) is formed in the upper surface metal foil at a location corresponding to a blind via hole formation portion (35) of the insulative substrate. A blind via hole (3), the bottom of which is the lower surface metal foil, is formed by emitting a laser (8) against the blind via hole formation portion (35) through the opening (213). Then, a metal plating film (23) is applied to the wall of the blind via hole (3), and an upper surface pattern (21) and a lower surface pattern (22) are formed through etching.