Abstract:
A printed circuit board for electrical devices having RF components, particularly for mobile radio telecommunication devices, wherein to increase the packing density of electronic circuits and conductor-track structures on such circuit board, a “micro via” coating is initially applied to one or both sides of a printed circuit board assembly. This “micro via” coating then has, in particular, RF circuits and RF conductor-track structures applied to at least part of its surface. Finally, the RF circuits and RF conductor-track structures are protected in relation to an RF ground coating of the printed circuit board assembly by barrier areas arranged in an assembly coating, situated directly below the “micro via” coating, of the printed circuit board assembly against interfering influences which impair the RF parameters, to be set in each case, of the RF circuits and RF conductor-track structures.
Abstract:
A circuit assembly that includes a circuitized substrate having a dielectric interior layer with a first surface and at least one hole therein. A filler material substantially fills the hole within the dielectric interior layer. A first wiring layer is positioned on the first surface of the dielectric interior layer, wherein the first wiring layer substantially covers the hole and assists in retaining the filler material within the hole in the dielectric interior layer. A first dielectric photoresist layer is positioned on the first wiring layer and on the first surface of the dielectric interior layer. The first dielectric photoresist layer also includes at least one hole therein. The filler material also substantially fills the hole within the first dielectric photoresist layer. A second wiring layer is positioned on the first dielectric photoresist layer and includes a plurality of conductive pads as part thereof. At least one external component can be electrically coupled to the conductive pads of the second wiring layer.
Abstract:
Disclosed is a printed circuit board and a method of preparing the printed circuit board, The printed circuit board has two types of plated through holes. The first type of plated through holes extend to and through an exterior surface of the printed circuit board for receipt of a pin-in-through-hole module or component pin. The second type of plated through holes are for surface mount technology and terminate below the exterior surface of the printed circuit board. These plated through holes contain a fill composition.
Abstract:
Disclosed is a printed circuit board and a method of preparing the printed circuit board. The printed circuit board has two types of plated through holes. The first type of plated through holes extend to and through an exterior surface of the printed circuit board for receipt of a pin-in-through-hole module or component pin. The second type of plated through holes are for surface mount technology and terminate below the exterior surface of the printed circuit board. These plated through holes contain a fill composition.
Abstract:
The present invention is directed toward a printed-circuit substrate comprisng a first layer having through holes formed through a sheet impregnated with resin which shows a half-hardened property at the time of impregnation, a first electrically conductive circuit provided on the sheet, and a second layer having an electrically conductive circuit provided on either a metal or resin substrate. The first and second layers are pressure-stuck to each other and the through holes are filled with an electrically conductive material. The present invention is also directed to a method of making a printed-circuit substrate comprising the steps of: forming through holes and a first electrically conductive circuit respectively throgh and on at least one layer of a sheet impregnated with resin which shows a half-hardened property at the time of impregnation, thereby forming a first layer; forming a second electrically conductive circuit on an insulating plate having through holes formed therein and plating said through holes and opposite surfaces of the insulating plate, thereby forming a second layer; heat sticking said first layer onto said second layer; and filling said through holes with an electrically conductive material, thereby electrically connecting the first and second electrically conductive circuits.
Abstract:
A multilayer printed circuit board which reliably and economically marries conventional copper clad printed circuit board technology with polymeric conductors and insulators. Reliability is enhanced by forming all solder pads of copper, providing conductive tails on solder pads which are to be connected by polymeric inks, and ultimately forming a solder resist over all but the solder pads. As a result, polymer inks can be applied to both sides of the board, and the completed board can be subject to conventional solder dipping or wave soldering operations. According to one feature of the invention, a thin dielectric layer can be applied as intermediate to planar conductive layers which form a power plane having built-in distributed capacitance for decoupling.
Abstract:
Multilayer circuit boards having large area through-hole electrical connections are provided by a process that begins with the fabrication by known means of a drilled and through-hole plated single layer board. Next, a layer of insulating material is applied to either side of the board, leaving at least the through-hole plating exposed. A continuous layer of metal is then deposited on the body, completely covering the insulating layer and through-hole plating. Finally, the deposited metal layer is selectively masked and etched to form conductive circuit patterns on the insulating layer, overlying the original circuit patterns and electrically connected to them by the multiple layer through-hole plating.
Abstract:
THE DISCLOSED TECHNIQUE COMPRISES THE LAMINATION OF TWO OR MORE CIRCUIT BOARDS USING A CONTROLLED FLOW ADHESIVE LAYER; THE CONTROLLED FLOW ADHESIVE PERMITTING THROUGH HOLES TO REMAIN UNOBSTRUCTED AFTER LAMINATION. FINAL INTERCONNECTION IS MADE BY PLATING THROUGH THE HOLES, THEREBY PROVIDING THE REQUISITE INTERCONNECTIONS BETWEEN SURFACES.
Abstract:
PROBLEM TO BE SOLVED: To provide a printed board and a printed board unit by which a rise amount of a conductor can securely be detected. SOLUTION: A through hole 23 of a board 14 partitions a space by an insulator. The through hole 23 receives a lead terminal 28 of an electronic component 15. The lead terminal 28 is brought into contact with the conductor 29. The conductor 29 is exposed at least on the first face or the second face of the board 14. Conductor patterns 24, 25, 26 and 27 face the space in the through hole 23 from between arbitrary insulating layers 17. The conductor patterns 24, 25, 26 and 27 are connected to conductive materials 33, 34, 37 and 38 exposed at least in the first face or the second face of the board 14. The presence or absence of the establishment of conduction is detected between the lead terminal 28 and one of the conductive materials 33, 34, 37 and 38. When conduction is detected, it is confirmed that the conductor 29 is raised to positions of the conductive materials 33, 34, 37 and 38. The rise amount of the conductor 29 is securely detected. COPYRIGHT: (C)2008,JPO&INPIT