Abstract:
A device housing package includes a substrate in a form of a rectangle, having a mounting region of a device at an upper surface thereof; a frame body disposed on the substrate so as to extend along an outer periphery of the mounting region, the frame body having a cutout formed at a part thereof; and an input-output terminal disposed in the cutout. The input-output terminal includes a first insulating layer, a second insulating layer overlaid on the first insulating layer, and a third insulating layer overlaid on the second insulating layer. First terminals set at a predetermined potential are disposed on an upper surface of the first insulating layer. Second terminals set at a predetermined potential are disposed on a lower surface of the first insulating layer. Third terminals through which AC signals flow are disposed on an upper surface of the second insulating layer.
Abstract:
A method for manufacturing a printed wiring board includes forming a removable layer on a support substrate, forming an interlayer resin insulation layer on the removable layer, forming a penetrating hole in the interlayer resin insulation layer, forming a first conductive layer on the interlayer resin insulation layer and on a side wall of the penetrating hole, forming a conductive circuit on the interlayer resin insulation layer, forming a via conductor in the penetrating hole, removing the support substrate from the interlayer resin insulation layer by using the removable layer, forming a protruding portion of the via conductor protruding from a surface of the interlayer resin insulation layer, and forming a surface-treatment coating on a surface of the protruding portion of the via conductor.
Abstract:
A printed wiring board includes an interlayer resin insulation layer having a penetrating hole for a via conductor, a conductive circuit formed on one surface of the interlayer resin insulation layer, a via conductor formed in the penetrating hole and having a protruding portion protruding from the other surface of the interlayer resin insulation layer, and a surface-treatment coating formed on the surface of the protruding portion of the via conductor. The via conductor is connected to the conductive circuit and has a first conductive layer formed on the side wall of the penetrating hole and a plated layer filling the penetrating hole.
Abstract:
Disclosed is a radiant heat printed circuit board, which has improved heat-radiating properties and reliability, and a method of fabricating the same.
Abstract:
A process is revealed whereby resistors can be manufactured integral with a printed circuit board by plating the resistors onto the insulative substrate. Uniformization of the insulative substrate through etching and oxidation of the plated resistor are discussed as techniques for improving the uniformity and consistency of the plated resistors. Trimming and baking are also disclosed as methods for adjusting and stabilizing the resistance of the plated resistors.
Abstract:
The present invention has for its object to provide a process for manufacturing multilayer printed circuit boards which is capable of simultaneous via hole filling and formation of conductor circuit and via holes of good crystallinity and uniform deposition can be constructed on a substrate and high-density wiring and highly reliable conductor connections can be realized without annealing.The present invention is related to a process for manufacturing multilayer printed circuit boards which comprises disposing an interlayer resin insulating layer on a substrate formed with a conductor circuit, creating openings for formation of via holes in said interlayer resin insulating layer, forming an electroless plated metal layer on said interlayer resin insulating layer, disposing a resist thereon, performing electroplating, stripping the resist off and etching the electroless plated metal layer to provide a conductor circuit and via holes, wherein the electroplating is performed intermittently using said electroless plated metal layer as cathode and a plating metal as anode at a constant voltage between said anode and said cathode.
Abstract:
Provided is a wiring board and production method thereof, wherein production of wiring by a full additive method is achieved. This is extremely useful in forming fine copper wiring featuring a high adhesion on an insulating resin substrate. A resin having an excellent alkali resistance is used as the insulating resin substrate, and the copper wiring is formed on the insulating resin substrate through a degenerated layer containing amide group and a metallic oxide layer of a metal having a reduction potential more base than that of copper. The degenerated layer can be provided by, e.g., introduction of amide group into the surface of the insulating resin substrate. The copper can be formed by processes including electroless plating. The insulating resin substrate has superb heat resistance and dimensional stability, and the formed structure can provide a highly packed wiring board.
Abstract:
A process is revealed whereby resistors can be manufactured integral with the printed circuit board by plating the resistors onto the insulative substrate. Uniformization of the insulative substrate through etching and oxidation of the plated resistor are revealed as techniques for improving the uniformity and consistency of the plated resistors.
Abstract:
There is disclosed a process for electroless plating of a conductive metal layer onto the surface of a non-conductive substrate, in which the substrate surface is prepared for receiving a coating of activator using conventional methods, and the coating of activator is applied by contacting the substrate surface with a stabilized sensitizing solution comprising ions of at least one Group VIII and IB transition metal, preferably palladium chloride, stannous ions in a molar concentration in excess of that of the transition metal ions, an acid, and a buffering salt; followed by contacting the sensitized substrate surface with a noble metal activating solution to catalyze the substrate surface for subsequent electroless plating. The sensitized and activated substrate is then contacted with an aqueous dry film photoresist, which is then imaged and developed to form a predetermined electrical circuit pattern, using conventional methods. The cleaned and imaged substrate is then immersed in an acidic electroless nickel metal depositing solution, for a time, at a concentration, and at a temperature sufficient to prepare the substrate for subsequent pattern electroplating, said acidic electroless metal depositing solution comprising ions of nickel, a complexing agent, a reducing agent capable of reducing said metal ions to a metallic state in an acidic medium, provided that said reducing agent does not include formaldehyde or a formaldehyde generating composition, one or more stabilizers, and water.
Abstract:
The present invention relates to a process for the manufacture of printed circuit boards. The method contemplates the use of electroless nickel as the primary medium for interconnection, for building circuitry to the desired thickness and as an etch resist. The method is particularly versatile in reducing the number of steps and variety of chemicals currently necessary to produce these circuit boards.