The wired circuit board includes a metal supporting board, an insulating layer and a conductor layer disposed at one side in the thickness direction of the metal supporting board, a gold plate layer disposed at the other side in the thickness direction of the metal supporting board, and an adherence layer disposed between the metal supporting board and the gold plate layer. The material of the metal supporting board is a corrosion resistant alloy. In the adherence layer, gold and the metal contained in the corrosion resistant alloy are mixedly present.

A ceramic circuit board and a method of making are provided. The ceramic circuit board includes a substrate and a composite material layer. The composite material layer is formed on the substrate and comprises metal oxide powders and ceramic powders. The composite material layer has an interface layer which is transformed from the metal oxide powders by reduction and includes comprises zero-valent metal, lower-valent metal oxide and eutectic mixture reduced from the metal oxide powders of the composite material layer.

A monolithic substrate including a silica material fused to bulk copper is provided for coupling with electronic components, along with methods for making the same. The method includes arranging a base mixture in a die mold. The base mixture includes a bottom portion with copper micron powder and an upper portion with copper nanoparticles. The method includes arranging a secondary mixture on the upper portion of the base mixture. The secondary mixture includes a bottom portion with silica-coated copper nanoparticles and an upper portion with silica nanoparticles. The method includes heating and compressing the base mixture and the secondary mixture in the die mold at a temperature, pressure, and time sufficient to sinter and fuse the base mixture with the secondary mixture to form a monolithic substrate. The resulting monolithic substrate defines a first major surface providing thermal conductivity, and a second major surface providing an electrically resistive surface.

A power semiconductor module includes a first substrate, wherein the first substrate includes aluminum, a first aluminum oxide layer arranged on the first substrate, a conductive layer arranged on the first aluminum oxide layer, a first semiconductor chip, wherein the first semiconductor chip is arranged on the conductive layer and is electrically connected thereto, and an electrical insulation material enclosing the first semiconductor chip, wherein the first aluminum oxide layer is configured to electrically insulate the first semiconductor chip from the first substrate.

A printed circuit board (PCB) includes a first aluminum layer, having a first thickness, electrically insulated with a coating of alumina applied to a surface of the first aluminum layer; a second aluminum layer, having a second thickness that is different than the first thickness, insulated with a coating of alumina applied to a surface of the second aluminum layer; and a conductive layer bonded to the coating of alumina on the first aluminum layer, the coating of alumina on the second aluminum layer, or both.

A ceramic circuit board and a method of making are provided. The ceramic circuit board includes a substrate and a composite material layer. The composite material layer is formed on the substrate and comprises metal oxide powders and ceramic powders. The composite material layer has an interface layer which is transformed from the metal oxide powders by reduction and includes comprises zero-valent metal, lower-valent metal oxide and eutectic mixture reduced from the metal oxide powders of the composite material layer.

A printed circuit board (PCB) includes a solder resist layer including at least one of an opening and a depression and a solder resist patch disposed in at least one of the opening and the depression to have an interface with the solder resist layer in at least one of the opening and the depression.

A method for making conformal non-planar multi-layer circuitry is described. The method can include providing a substrate having a non-planar surface and depositing a first conformal dielectric layer on the substrate, the first conformal dielectric layer conforming to the non-planar surface of the substrate and having a non-planar surface. The method can also include applying a first conformal circuitry layer on the first conformal dielectric layer. The method can include depositing a second conformal dielectric layer on the first conformal circuitry layer, the second conformal dielectric layer conforming to a non-planar surface of the first conformal circuitry layer, and applying a second conformal circuitry layer on the second conformal dielectric layer. Successive layers can be sequentially deposited. Microvias may provide electrical connections between circuit layers.

A metal-core printed circuit board (MCPCB) and method of generating an ultra-narrow, high-current pulse driver with a MCPCB is provided. The MCPCB includes a rigid, metal heat sink layer and at least one electrically conductive top layer. At least one electrically insulating dielectric layer is positioned between the conductive top layer and rigid, metal heat sink layer, wherein the dielectric layer has a thickness of less than 0.007 inches.

According to various embodiments of the present disclosure, a metal unit may include: a core metal layer that is mainly composed of iron (Fe); and an outer layer formed on at least one face of the core metal layer, and bonded to solder so as to be attached to a printed circuit board. The metal unit and an electronic device including the same may be variously implemented according to embodiments.