Abstract:
Method of producing a multi-layered wiring board comprising the steps of subjecting the photosensitive resin to exposure- and development-treatment to form the holes having a predetermined size and shape; depositing and forming the curable resin to the insulating layer having the holes formed therein in such a manner as to bury the holes, and conducting heat-treatment to form the cured thin film of the curable resin on the surface of the insulating layer; and so removing the curable resin as to leave the cured thin film to obtain the via-holes having the reduced opening size by the cured thin film.
Abstract:
A wiring glass substrate includes a glass substrate formed of glass and having a plurality of holes formed at predetermined positions, bumps so formed as to be connected to a conductive material filling the holes and wirings formed on a surface opposite to a surface having the bumps formed thereon and electrically connecting a plurality of connection terminals arranged in intervals different from intervals of the holes to the conductive material. The shape of the conductive material is porous and porous electrodes are bonded to the inner wall surfaces of the holes by an anchor effect to increase the strength of the glass substrate.
Abstract:
A capacitor sheet includes a laminate sheet, interface-connection feedthrough conductors for electrically connecting faces of the laminate sheet, and capacitor-connection feedthrough conductors. The laminate sheet has at least one laminate which is composed of a power source layer electrode, a grounding layer electrode, and a dielectric layer interposed between the power source layer electrode and the grounding layer electrode. The interface-connection feedthrough conductors are formed in through holes that pass through the dielectric layer, the power source layer electrode, and the grounding layer electrode, and are insulated by insulation walls from the power source layer electrode and the grounding layer electrode provided inside. The capacitor-connection feedthrough conductors are formed in regions where only either the power source layer electrode or the grounding layer electrode is provided, and are connected electrically with either the power source layer electrode or the grounding layer electrode. This configuration makes the electric connection for employing the capacitors and the electric connection between faces of the sheet independent from each other. Thus, it is possible to provide a capacitor sheet in which the adverse effects of inductances of vias are minimized.
Abstract:
A stacked capacitor which comprises: a dielectric layer; a two-dimensional array of terminal electrodes on at least one of first and second surfaces of the dielectric layer; first internal electrodes stacked in multi-levels in the dielectric layer, and the first internal electrodes being electrically connected to a power line second internal electrodes stacked in multi-levels in the dielectric layer, and the second internal electrodes being electrically connected to a ground line; vias in the dielectric layer, so that the terminal electrodes being electrically connected through the vias to the first and second internal electrodes.
Abstract:
A capacitor sheet includes a laminate sheet, interface-connection feedthrough conductors for electrically connecting faces of the laminate sheet, and capacitor-connection feedthrough conductors. The laminate sheet has at least one laminate which is composed of a power source layer electrode, a grounding layer electrode, and a dielectric layer interposed between the power source layer electrode and the grounding layer electrode. The interface-connection feedthrough conductors are formed in through holes that pass through the dielectric layer, the power source layer electrode, and the grounding layer electrode, and are insulated by insulation walls from the power source layer electrode and the grounding layer electrode provided inside. The capacitor-connection feedthrough conductors are formed in regions where only either the power source layer electrode or the grounding layer electrode is provided, and are connected electrically with either the power source layer electrode or the grounding layer electrode. This configuration makes the electric connection for employing the capacitors and the electric connection between faces of the sheet independent from each other. Thus, it is possible to provide a capacitor sheet in which the adverse effects of inductances of vias are minimized.
Abstract:
An electronic device and method of making same wherein the device includes a substrate (e.g., a printed wiring board or semiconductor chip) having a circuit thereon, a first non-photosensitive layer (e.g., polyimide resin) positioned on the substrate and over the substrate's circuit, a second, photosensitive layer (e.g., epoxy resin) positioned on the first layer, and an electrically conductive layer positioned on the first, non-photosensitive layer and electrically coupled to the circuit through a hole in the first layer.
Abstract:
Interferometric apparatus and methods by which aspheric surfaces and wavefronts may be precisely measured. The apparatus is provided with two modes of operation. In one mode, the apparatus is configured generally as a Fizeau interferometer in which an aspheric reference surface is used to permit the rapid, robust measurement of the difference between the aspheric reference surface and an aspheric test optic or wavefront. In another mode of operation, the aspheric test surface itself is completely characterized through in-situ use of an interferometric scanning technique using a spherical reference surface.
Abstract:
A method for forming an electrically isolated via in a multilayer ceramic package and an electrical connection formed within the via are disclosed. The method includes punching a first via in a first layer, filling the first via with a cross-linkable paste, curing the paste to form an electrical insulator precursor and forming the via in the insulator precursor. The electrical connection formed includes an insulator made from a cross-linked paste supported by a substrate of a multilayer ceramic package and a conductive connection supported by the insulator.
Abstract:
In manufacturing a double-layered or a multi-layered printed wiring board, a layer of metamorphic substance, which is created by transmuting a substrate material, is formed on an inner wall of a hole during a perforation process of the substrate utilizing radiation energy. The layer of metamorphic substance prevents conductive materials constituting electrical connection formed on the inner wall of the hole from dispersing over a surface of the substrate or permeating into the substrate.
Abstract:
A multi-layer electronic circuit board design 10 having a core member 12, a pair of dielectric layers 14, 16 disposed thereon, and a first circuit portion 20 which is coupled to the dielectric layer 14 and core member 12 using a layer of adhesive material 18. Circuit board design 10 further having selectively formed “blind” apertures, vias or cavities 22 formed through the first circuit portion 20, dielectric layer 14, and adhesive layer 18, thereby exposing core member 12.