Printed circuit boards having an increased density of vertical interconnect paths, as well as methods for their manufacture. One example may provide a printed circuit board having an increased density of vertical interconnect paths by forming a plurality of segmented vias. The segmented vias may extend through interior layers of the printed circuit board. The segmented vias may be formed of portions of vias in the interior layers of the printed circuit board. An area between three or more segmented vias may be filled with resin or other material or materials.

A method and apparatus are provided for implementing customized printed circuit board (PCB) via creation through use of magnetic capture pads. At least one magnetic capture pad is rendered before aqueous seed and plate processing in the PCB manufacture. The magnetic capture pad selectively provides seed material rendering copper in at least one selected region of the via.

A printed circuit board in accordance with a disclosed embodiment may include first insulating layer having first via formed therein and second insulating layer laminated on both surfaces of the first insulating layer and having second via formed therein. The second via may connect first circuit formed on the first insulating layer with second circuit formed on the second insulating layer. A diameter of the second via may become greater toward an inside of the printed circuit board.

A circuit board has a dielectric core, a foil top surface, and a thin foil bottom surface with a foil backing of sufficient thickness to absorb heat from a laser drilling operation to prevent the penetration of the thin foil bottom surface during laser drilling. A sequence of steps including a laser drilling step, removing the foil backing step, electroless plating step, patterned resist step, electroplating step, resist strip step, tin plate step, and copper etch step are performed, which provide dot vias of fine linewidth and resolution.

A multi-layer circuit board is formed by positioning a top sub having traces on at least one side to one or more pairs of composite layers, each composite layer comprising an interposer layer and a sub layer. Each sub layer which is adjacent to an interposer layer having an interconnection aperture, the interconnection aperture positioned adjacent to interconnections having a plated through via or pad on each corresponding sub layer. Each interposer aperture is filled with a conductive paste, and the stack of top sub and one or more pairs of composite layers are placed into a lamination press, the enclosure evacuated, and an elevated temperature and laminated pressure is applied until the conductive paste has melted, connecting the adjacent interconnections, and the boards are laminated together into completed laminated multi-layer circuit board.

The present disclosure relates a printed circuit board having an EMI shielding function. In an example embodiment, the printed circuit board includes a substrate, a signal unit disposed on the substrate, a ground unit disposed in parallel with the signal unit, an insulation layer disposed above the substrate and covering the signal unit and the ground unit, an EMI shielding layer disposed on the insulation layer and under the substrate, respectively, and a shielding bridge passing through the substrate and the insulation layer at opposite sides of the signal unit and electrically connecting the EMI shielding layer disposed on the insulation layer to the EMI shielding layer disposed under the substrate.

Provided is a circuit board capable of dissipating heat at a higher efficiency compared with conventional cases from an electronic component mounted at a high density. A circuit board has a first wiring layer and a second wiring layer, which are laminated on the front surface side of an aluminum base material. The second wiring layer is positioned between the first wiring layer and the base material. The first wiring layer is provided with a land having a BGA placed thereon and connected thereto, said BGA being a terminal of a wafer-level chip-size package. The land is electrically connected to the second wiring layer by means of a via-filling plating formed at a position overlapping the land when viewed from the lamination direction Z. Heat of the wafer-level chip-size package is transmitted to the base material via the land, the via-filling plating, and the second wiring layer, and is dissipated from the base material.

A method for manufacturing traces of a printed circuit board (PCB) comprises an application of the periodic pulse reverse (PPR) pattern plating process. In the first stage, walls and bottoms in drilled holes of the PCB are modified with reduced graphene oxide (rGO) so that the vias can be formed by filling with copper and a very thin copper layer can be formed on the substrate through the electroplating process. In the second stage, a pattern of very fine traces with width/space less than 30/30 m is formed on the thin copper layer and then the traces are formed through the PPR pattern plating process. After removing unwanted copper layer, the traces with even thicknesses and square profiles are achieved and thus conform to requirements of the high density interconnection (HDI) technology.

A circuit board assembly and an electronic is provided. The circuit board assembly includes at least a frame plate and circuit boards. The frame plate includes a frame body, first soldering portions, and second soldering portions. The frame body has a middle accommodating hole, an inner wall facing the middle accommodating hole, and an outer wall facing away from the middle accommodating hole. The first soldering portions are provided in an intermediate region located on the frame body between the inner wall and the outer wall. At least one of the inner wall and the outer wall is provided with accommodating grooves. The accommodating grooves extend along a thickness direction of the frame plate. The second soldering portions are provided in the accommodating grooves and connected to the frame body. Two circuit boards are respectively provided on two opposite sides of the frame plate along the thickness direction. The circuit board includes pads.

A printed circuit board includes a printed wiring board including an insulative substrate having a first surface and a second surface opposite to the first surface, and wiring provided on the second surface of the insulative substrate to face the through-holes. The insulative substrate has flexibility and through-holes passing through the insulative substrate from the first surface to the second surface. A semiconductor element is mounted on the first surface of the insulative substrate of the printed wiring board and has element terminals interposed between the printed wiring board and the semiconductor element. Conductive members filled in the through-holes connect the element terminals and the wiring. The insulative substrate has elasticity in which an elongation percentage of the insulative substrate is 20% or more. The wiring is formed from a conductive polymer or an elastic conductive paste in which conductive particles are mixed into a resin material.