Abstract:
A printed wiring board includes a plurality of conductor plates that includes at least one conductor plate that is used as a lead for electrical connection with an external circuit, the conductor plates being separated spatially from one another; an insulating layer formed on or across the conductor plates or both on and across the conductor plates; and a plurality of wiring patterns formed on the insulating layer. At least one of the conductor plates is electrically connected with at least one of the wiring patterns through a via-hole.
Abstract:
A method for forming an electrical interconnect to the spring metal layer in an integrated lead suspension or suspension component of the type having a multi-layer structure including a spring metal layer and a conductor layer separated by a dielectric insulator layer. The method includes forming an aperture through at least one of either the spring metal and conductor layers, and optionally through the dielectric layer, at an interconnect site. A first mass of malleable conductive metal is inserted into the aperture. The mass of metal is then coined to form a stud that engages at least the spring metal layer at the interconnect site. One embodiment of the invention is used to form a bond pad stud that is free from contact with the conductor layer. Another embodiment is used to form an electrical interconnect stud that electrically connects the spring metal and conductor layers. The invention can also be used to mount integrated lead flexures to load beams.
Abstract:
An integrated circuit substrate having laser-embedded conductive patterns provides a high-density mounting and interconnect structure for integrated circuits. Conductive patterns within channels on the substrate provide interconnects that are isolated by the channel sides. A dielectric material is injection-molded or laminated over a metal layer that is punched or etched. The metal layer can provide one or more power planes within the substrate. A laser is used to ablate channels on the surfaces of the outer dielectric layer for the conductive patterns. The conductive patterns are electroplated or paste screen-printed and an etchant-resistive material is applied. Finally, a plating material can be added to exposed surfaces of the conductive patterns. An integrated circuit die and external terminals can then be attached to the substrate, providing an integrated circuit having a high-density interconnect.
Abstract:
Disclosed are a hybrid integrated circuit device and a method of manufacturing thereof which can enhance reliability of connections between conductive patterns and a circuit board. A method of manufacturing the hybrid integrated circuit device comprises the steps of providing an insulating layer on a surface of the circuit board made of metal, forming conductive patterns on the surface of the insulating layer so as to constitute a plurality of units, forming exposure holes so as to penetrate the insulating layer in the respective units and thereby to expose the circuit board from bottom portions of the exposure holes, forming flat portions at the bottom portions of the exposure holes in the respective units, electrically connecting circuit elements to the conductive patterns in the respective units, electrically connecting the flat portions to the conductive patterns in the respective units by use of thin metallic wires, and separating the respective units.
Abstract:
A suspension includes a flexure constituted by a metal plate member, for supporting a head slider provided with at least one head element, a load beam provided with a top end section and constituted by a metal plate member, for supporting the flexure at the top end section, and an individual FPC member attached to the flexure and the load beam and provided with trace conductors to be electrically connected to the at least one head element of the head slider. The FPC member includes a plurality of via holes provided with metal fillers filled therein, the metal fillers in the respective via holes are welded to the flexure and/or the load beam, and the FPC member is fixed to the flexure and/or the load beam at least by means of the welding.
Abstract:
An electrical circuit apparatus (300) that includes: a substrate (330) having a ground layer (336), at least one device aperture (332), and at least one solder aperture (334); a heat sink (310); and an adhesive layer (320) for mechanically coupling the heat sink to the ground layer of the substrate such that at least a portion of the substrate device aperture overlaps the heat sink, the adhesive layer having at least one device aperture and at least one solder aperture, wherein aligning the at least one substrate solder aperture with the at least one adhesive layer solder aperture and aligning the at least one substrate device aperture with the at least one adhesive layer device aperture enables solder wetting in a predetermined area between the heat sink and the ground layer of the substrate.
Abstract:
Provided is a hybrid integrated circuit device which can more effectively stabilize a circuit configured to operate at a high speed. A hybrid integrated circuit device of the embodiment includes a metal substrate provided with an insulating layer on a surface thereof, a conductive pattern formed on a surface of the insulating layer, a semiconductor element fixed onto the conductive pattern, a lead as external connecting means fixed to the conductive pattern in the periphery of the metal substrate, and a contact portion for electrically connecting the conductive pattern electrically connected to the semiconductor element to the metal substrate in the vicinity of the semiconductor element.
Abstract:
A thin type printed circuit board with an enclosed capacitor of a large capacitance. The printed circuit board includes metal sheet 11 having roughed surface presenting micro-irregularities, a dielectric film for capacitor 12 covering the surface of the metal sheet, and a first electrically conductive layer of electrically conductive resin 13 covering the surface of the dielectric film. A second electrically conductive layer 14 is provided on the surface of the first electrically conductive layer in a region of via for cathode side connection 18. The metal sheet and the first and second electrically conductive layers are encapsulated by resin 15. The via for cathode side connection 18, obtained on boring through the resin 15 until reaching the second electrically conductive layer 14, is coated with an electrode 20. A via for anode side connection 19 obtained on boring through the resin 15 is coated with an electrode 21 that is insulated from the second electrically conductive layer 13 by the resin 15.
Abstract:
A circuit board and a fabricating process thereof is provided. The present invention employs a core layer as a base layer, wherein the core layer is a core conducting layer, or is a core dielectric layer having two conducting layers. By using this core layer and two patterned conductive layers, a three-conducting-layer circuit board or a four-conducting-layer circuit board is fabricated. Furthermore, both circuit boards can be used as circuit board units to fabricate circuit boards having more than four conducting layers. The present invention adopts lamination processes and equipment instead of using complicated build-up process. Therefore, the present invention effectively reduces the production costs and simplifies the process cycle for fabricating circuit boards, and is suitable for mass production.
Abstract:
A method of manufacturing a printed circuit board through-hole connection includes forming a through-hole by removing material from the first side of the printed circuit board until the backing and then slightly into the first side of the backing providing a hole. Next, plating through the hole connecting the backing layer, ground layer, and signal layer. Now the plating of the signal layer is removed without removing the connection from the ground layer to the backing. Finally, the hole is filled from the first side of the printed circuit board. A method of manufacturing a MMIC printed circuit board through-hole connection includes forming a through-hole by removing material from the first side of the MMIC printed circuit board through the first signal layer, through the MMIC until the second signal layer, and then slightly into the top side of the second signal layer. Once the material is removed, an electrical connection is provided to the first signal layer, the MMIC and the second signal layer. A printed circuit board through-hole connection that includes an assembled layout of a printed circuit board and formed through holes by material removed from the first side of the printed circuit board up to the backing and then slightly into the top portion of the backing. It further includes plated through-holes that connect the backing, a ground layer and a signal layer, removed plating from the signal layer without the connection removed from the ground layer to the backing and filled through-holes from the first side with a non conductive filler.