A method for manufacturing a wiring substrate includes preparing a substrate including an insulating layer and metal foils, forming a through hole in the substrate to penetrate through the insulating layer and foils, forming a first plating film on the substrate such that the first film is formed on the entire surface of each metal foil and the inner wall of the hole, laminating one or more resin sheets on the first film such that the resin sheet or sheets cover the first film on the entire surface of a respective one of the foils, pressing the resin sheet or sheets such that resin is extruded from the resin sheet or sheets into the hole and fills space surrounded by the first film inside the hole, removing the resin sheet or sheets, and forming a second plating film on the substrate to cover surface of the resin in the hole.

A resistor-embedded circuit board and a method for processing the resistor-embedded circuit board are provided by the present disclosure. By opening an embedded-resistor cavity on a substrate, embedding a resistor into the embedded-resistor cavity to acquire a circuit board containing a built-in resistor. By opening the embedded-resistor cavity, it is very easy to realize high-precision control of a shape and a thickness of an embedded resistor, and realize very high-precision resistor-embedding; and it is easy to realize high-precision and massive processing. In a resistor-embedded layer, a resistor is built in a substrate. Then, in a process of pressing, a crack and a relatively large deformation will not be caused after pressing due to an irregular surface of the resistor-embedded layer, thereby improving a reliability and a quality rate of the circuit board.

A wiring board includes a core layer having a first through hole formed therein, a magnetic resin filled inside the first through hole, a second through hole formed in the magnetic resin, and a plating film covering an inner wall surface of the second through hole. The plating film includes an electroless plating film, and an electrolytic plating film. The electroless plating film makes direct contact with an inner wall surface of the second through hole.

The method for producing a laminate having a patterned metal foil includes masking the whole surface of a first metal foil in a laminate having the first metal foil, a first insulating resin layer having a thickness of 1 to 200 μm and a second metal foil laminated in this order, and patterning the second metal foil.

Panels of LED arrays and LED lighting systems are described. A panel includes a substrate having a top and a bottom surface. Multiple backplanes are embedded in the substrate, each having a top and a bottom surface. Multiple first electrically conductive structures extend at least from the top surface of each of the backplanes to the top surface of the substrate. Each of multiple LED arrays is electrically coupled to at least some of the first conductive structures. Multiple second conductive structures extend from each of the backplanes to at least the bottom surface of the substrate. At least some of the second electrically conductive structures are coupled to at least some of the first electrically conductive structures via the backplane. A thermal conductive structure is in contact with the bottom surface of each of the backplanes and extends to at least the bottom surface of the substrate.

A printed circuit board and method of manufacturing a printed circuit board are disclosed. In one example, the method comprises embedding an electronic component in a laminate, and protecting the electronic component against electrostatic discharge during at least part of the manufacturing process by an electrically conductive electrostatic discharge protection structure integrated in the laminate and connected to the electronic component.

Methods of manufacture are described. A method includes forming a first cavity in a substrate and placing a backplane in the first cavity. At least one layer of dielectric material is formed over the substrate and the backplane. A second cavity is formed in the at least one layer of the dielectric material to expose at least a portion of a surface of the backplane. A heat conductive material is placed in the second cavity and in contact with the at least the portion of the surface of the backplane.

A method for manufacturing a printed wiring board includes preparing an intermediate substrate including an insulating layer, a conductor layer including circuits, and a first resin insulating layer, inputting, to a laser processing machine that forms openings, positions of the openings, generating, based on analysis of the conductor layer, classification of the circuits, inputting, to the machine, shot numbers for forming the openings determined based on the classification, and executing the machine based on the positions and shot numbers such that the openings are formed. The circuits include power supply, ground, and signal circuits, the classification includes stratifying such that the power supply and ground circuits belong to the first category and the signal circuits belong to the second category, and the inputting includes setting the shot number for the openings belonging to the first category is smaller than the shot number for the openings belonging to the second category.

A printed circuit board includes: a first insulating material; and a second insulating material disposed on one surface of the first insulating material, and including first and second cavities having depths different from each other. At least one groove portion is disposed in a side surface of each of the first and second cavities.

A component built-in substrate includes a multilayer body and a substrate including a multilayer ceramic electronic component embedded therein. The multilayer ceramic electronic component includes a first connection portion that protrudes from the first external electrode, and a second connection portion that protrudes from the second external electrode. The substrate includes a core material. The multilayer ceramic electronic component including the first connection portion and the second connection portion includes a surface covered by the core material and embedded in the substrate. The first connection portion protrudes toward a surface of the substrate, and is not exposed at the surface of the substrate. The second connection portion protrudes toward the surface of the substrate, and is not exposed at the surface of the substrate.