A first substrate includes a first surface and a second surface opposite to the first surface. A second substrate includes a third surface and a fourth surface opposite to the third surface. A third substrate includes a fifth surface and a sixth surface opposite to the fifth surface. The first substrate is made of an insulator, and includes a mounting portion for mounting an electronic element at the first surface, and the mounting portion for mounting the electronic element is a rectangular shape. The third substrate is made of a carbon material, and the fifth surface is connected to at least the second surface at location overlapped with the mounting portion for mounting the electronic element in plan view. The third substrate has a larger heat conduction in a direction perpendicular to the longitudinal direction of the mounting portion than heat conduction in the longitudinal direction of the mounting portion in plan view.

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 polyimide composite film for use in a flexible metal clad substrate, comprising: a polyimide base material film; a fluorine polymer layer, formed on at least one surface of the polyimide base material film, comprising polyimide resins and fluorine polymers, wherein the polyimide resin accounts for 2 to 20 wt % of the total solid content of the fluorine polymer layer, the aromatic functional group ratio of the polyimide resin in the fluorine polymer layer is greater than 35%, and the absorption onset wavelength (λonset) of the ultraviolet-visible spectrum is greater than 360 nm; a thickness ratio of the polyimide base material film to one layer of the fluorine polymer layers is 8:1 to 1:4; and a total thickness of the polyimide composite film is between 18 and 175 microns. Thus, the polyimide composite film has a low dielectric constant, low loss factor, and has good drilling processability.

An electronic component comprising a glass body containing a photosensitizer; a conductor as at least a part of an electric element, arranged on the glass body; a terminal electrode as a terminal of the electric element, arranged above an outer surface of the glass body, with the terminal electrode being electrically connected to the conductor; and an insulating film arranged above the outer surface of the glass body. The insulating film reflects or absorbs light in a photosensitive wavelength range of the photosensitizer contained in the glass body.

A component carrier for carrying at least one electronic component includes (a) a plurality of electrically conductive layers; (b) a plurality of electrically insulating layers; and (c) a thermoplastic structure. The electrically conductive layers, the electrically insulating layers, and the thermoplastic structure form a laminate. Further, a method for manufacturing such a component carrier and an electronic apparatus including such a component carrier are provided.

A printed wiring board includes a resin insulating layer including resin and particles, and a conductor layer formed on a surface of the resin insulating layer. The particles in the resin insulating layer include first particles and second particles such that the first particles are partially embedded in the resin and the second particles are completely embedded in the resin, and the resin insulating layer is formed such that the first particles has exposed surfaces exposed from the resin and covered surfaces covered by the resin, respectively, the surface of the resin insulating layer includes the first exposed surfaces, and a ratio of a second area to a first area is in a range of 0.1 to 0.25 where the first area is an area of the surface of the resin insulating layer, and the second area is obtained by summing areas of the exposed surfaces of the first particles.

A light-transmitting electroconductive film (20) according to the present invention includes a region containing krypton at a content ratio of less than 0.1 atomic % at least partially in a thickness direction (D) of the light-transmitting electroconductive film (20). A transparent electroconductive film (X) according to the present invention includes a transparent substrate (10); and the light-transmitting electroconductive film (20) disposed on one surface side in the thickness direction (D) of the transparent substrate.

A circuit board with improved heat dissipation function and a method for manufacturing the circuit board are provided. The circuit board includes a heat dissipation substrate, an insulating layer on the heat dissipation substrate, an electronic component, a base layer on the insulating layer, and a circuit layer on the base layer. The heat dissipation substrate includes a phase change structure and a heat conductive layer wrapping the phase change structure. The heat dissipation substrate defines a first through hole. The insulating layer defines a groove for receiving the electronic component. A second through hole is defined in the circuit layer, the base layer, and the insulating layer. A bottom of the second through hole corresponds to the heat conductive layer. A heat conductive portion is disposed in the second through hole.

A flexible wiring board that includes a flexible substrate; a flexible wiring over the flexible substrate; and a protective layer over the flexible substrate, where the protective layer includes: a first region that overlaps with the flexible wiring and a second region that does not overlap with the flexible wiring as viewed from a thickness direction of the flexible substrate, and a low flexibility part that is higher in flexibility ratio than the first region and is disposed along an extending direction of the flexible wiring in the second region.

A metal-clad laminate includes: an insulating layer; and a metal layer stacked on the insulating layer. The insulating layer includes: a first layer; and a second layer interposed between the first layer and the metal layer. The first layer contains a cured product of a first resin composition containing composite particles. The second layer contains a cured product of a second resin composition. The first resin composition contains composite particles, each having a core containing a fluororesin and a shell containing a silicon oxide that coats the core at least partially. The second resin composition may or may not contain composite particles. When the second resin composition contains the composite particles, a ratio of the composite particles in the second resin composition to solid content of the second resin composition is lower than a ratio of the composite particles in the first resin composition to solid content of the first resin composition.