Abstract:
A resin circuit substrate includes: a plurality of electronic parts having electrodes to be electrically connected to each other, with surfaces of the electrodes being disposed flush with each other; a resin for integrally molding surfaces of the electronic parts other than the surfaces of the electrodes so that the electronic parts are retained with the resin; and a circuit pattern for electrically connecting the electrodes to each other, the circuit pattern being laminated on exposed surfaces of the electrodes. A method for manufacturing the resin circuit substrate includes the steps of: positioning the electronic parts on a base having a flat surface so that surfaces of the electrodes contact the flat surface of the base; molding the electronic parts so as to be integrated with the resin on the flat surface thereof to form a molded part; hardening, drying or aging the molded part integrated with the electronic parts; removing the base from the molded part; printing a conductive resin onto the molded part to form a circuit pattern in such a manner that the conductive resin is laminated on a surface, of the molded part, including the surfaces of the electrodes; and hardening or drying the conductive resin.
Abstract:
A method of manufacturing a circuit structure where the electric and/or optical transmission medium or media include at least one of an optical signal transmission medium, an electric signal transmission medium, and an electric power transmission medium. The transmission media are insert-molded in plastics which is a housing for electronic and electric devices and parts. The circuit structure serves both for conductive circuits and housing so that the electronic and electric devices and parts can be wired and mounted at high density.
Abstract:
A circuit board (2) for receiving a component (38) requiring heat sinkage. The circuit board has a base portion (4) and a heat sink form portion (6) integral with the base portion. The heat sink form portion has a heat sink form and a coating (58) of thermally conductive material thereon to produce a heat sink. The heat sink has an aperture (32, 34) between a front surface (10) for contacting the component and a back surface (12) remote from the component to allow heat to be conducted directly from the front surface to the back surface. An integral resilient clamp (46-52) holds the component in contact with the heat sink. The integral nature of the base portion, the heat sink and the clamp provides a simple one piece board and the aperture enhances the heat sink efficiency by providing a direct heat conduction path to the back surface.
Abstract:
An adapter is interposed between a device having a pattern of pins projecting therefrom and a PCB having contacts connected to various components. The body of the adapter is made of platable dielectric material and is formed with holes corresponding to the pattern of pins of the device and also along one or more edges with pads corresponding in number to the holes. The holes are plated with conductive material which may be used to establish electrical contact with the pins; however, preferably clips are installed in each hole and in electrical contact therewith, the clips having converging fingers which frictionally engage the pins and also electrically contact the same. Electrically conductive traces are located on the body, each having a first end connected to the plating of a hole and a second end leading to one of the pads. The traces may be formed by a plate and etch process similar to that used in PCB fabrication. The pads of the body are plated with a material such as solder and are electrically connected to the second ends of the traces opposite the holes. The pins of the device fit into the holes of the body and the plated pads on the body are soldered to contacts on the PCB.
Abstract:
A solder resist and a positively-acting photoresist are successively applied on a surface-wide basis onto a printed circuit board, whereupon the photoresist is selectively exposed and developed in the region of plated-through holes and/or solder pads of a printed conductor pattern carried on the printed circuit board, preferably with the assistance of laser beams. Subsequently, the solder resist is stripped in the regions not protected by the photoresist, i.e. in the regions of plated-through holes and/or solder pads and, as a last step, the remaining photoresist is likewise stripped. The method is particularly suited for the application of a solder resist layer onto three-dimensional printed circuit boards since traditional mask techniques for structuring the solder resist cannot be employed with respect to three-dimensional printed circuit boards.
Abstract:
A process for producing a printed circuit board includes steps, sequentially conducted of dispersing in water or organic solvent:(A) 95 to 20% by weight of a styrene polymer having a syndiotactic structure, (B) 5 to 80% by weight of a fibrous filler having a fiber length of 1 to 50 mm, and (C) 0.1 to 30 parts by weight of at least one of a binder and a binding fiber in proportion to 100 parts by weight of the total amount of the components (A) and (B), to make a slurry having a concentration of 0.5 to 100 g/l; separating the solids from the slurry and drying and molding them. Thereafter the solids are either subjected to melting with heating and pressure forming into the molded article, or they are impregnated with a thermoplastic resin which is then cured. Finally, a metal layer is provided on the molded article.
Abstract:
This invention provides a method for manufacturing a three-dimensional circuit substrate. In the method, a conducting portion comprising a circuit pattern is formed on the surface of a film. The film is placed over a resin board in a mold in which the conducting portion of the film is opposed to the resin board. Subsequently, blow molding or vacuum forming is applied to the mold. The film and the resin board are thus closely overlapped, heat-bonded, and formed into the three-dimensional circuit substrate having a desired configuration. Through such minimum process steps, the three-dimensional circuit substrate with the complicated configuration can be manufactured easily with reduced cost.
Abstract:
An elongated flexible metal clad laminate formed of at least one metal layer and at least one plastic layer and having a smaller interlayer dimensional difference and excellent process-ability. A defect that a dimension of the metal layer is longer than a corresponding dimension of the plastic layer when they are compared to each other as discrete layers has been corrected by causing the metal layer to continually undergo compression plastic deformation in the form of the laminate and hence compressing the metal layer. A production method for the laminate and an apparatus for the method.
Abstract:
A conductive metal layer is formed on a substrate by depositing copper or nickel particles on the substrate, contacting the metal particles with a specified developing agent, and heating the metal particles and the developing agent. The coated substrates have conductive surfaces and are useful for a variety of uses such as EMI shielding and printed circuit boards.
Abstract:
A process for producing an electric circuit board comprises utilizing a transfer sheet, bearing an electric circuit pattern composed of a metal foil adhered onto a sheet substrate by means of an adhesive material, and transferring said electric circuit pattern onto a surface of an insulating resin substrate simultaneously with the molding thereof.