The present invention includes a method of creating high temperature mechanically and thermally stabilized PCB fabrication on a photo-definable glass substrate or photosensitive glass substrate.

This copper/ceramic bonded body includes: a copper member made of copper or a copper alloy; and a ceramic member made of aluminum-containing ceramics, the copper member and the ceramic member are bonded to each other, in which, at a bonded interface between the copper member and the ceramic member, an active metal compound layer containing an active metal compound that is a compound of one or more active metals selected from Ti, Zr, Nb, and Hf is formed on a ceramic member side, and in the active metal compound layer Al and Cu are present at a grain boundary of the active metal compound.

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 blank package for mimicking an electronic component package comprises a body and a plurality of conductive pads. The body is formed from generally transparent electrically insulating material and has a top surface, a bottom surface, and a plurality of side surfaces. The bottom surface has a shape and dimensions that are similar to a bottom surface of the electronic component package. The conductive pads are formed from electrically conductive material and attached to the body, with each conductive pad corresponding to a successive one of the conductive pads of the electronic component package. Each conductive pad has features that are similar to features of the corresponding conductive pad of the electronic component package.

A blank package for mimicking an electronic component package comprises a body and a plurality of conductive pads. The body is formed from generally transparent electrically insulating material and has a top surface, a bottom surface, and a plurality of side surfaces. The bottom surface has a shape and dimensions that are similar to a bottom surface of the electronic component package. The conductive pads are formed from electrically conductive material and attached to the body, with each conductive pad corresponding to a successive one of the conductive pads of the electronic component package. Each conductive pad has features that are similar to features of the corresponding conductive pad of the electronic component package.

An anisotropic conductive film, capable of connecting a terminal formed on a substrate having a wavy surface such as a ceramic module substrate with conduction characteristics stably maintained, includes an insulating adhesive layer, and conductive particles regularly arranged in the insulating adhesive layer as viewed in a plan view. The conductive particle diameter is 10 μm or more, and the thickness of the film is 1 or more times and 3.5 or less times the conductive particle diameter. The variation range of the conductive particles in the film thickness direction is less than 10% of the conductive particle diameter.

A glazing includes at least one glass sheet provided on one of the faces with an electrical network having resistance strips and collector strips, in which at least one portion of one face includes at least one strip obtained from an electrically conductive composition including a silver paste, the strip being in contact with another strip obtained from an electrically conductive composition including a copper paste, the other strip obtained from an electrically conductive composition including a copper paste being completely covered with a protective enamel layer.

A method of fabricating an electronic power module by additive manufacturing, the electronic module including a substrate having an electrically insulating plate presenting opposite first and second faces, with a first metal layer arranged directly on the first face of the insulating plate, and a second metal layer arranged directly on the second face of the insulating plate. At least one of the metal layers is made by a step of depositing a thin layer of copper and a step of annealing the metal layer, and the method further includes a step of forming at least one thermomechanical transition layer on at least one of the first and second metal layers, the at least one thermomechanical transition layer including a material presenting a coefficient of thermal expansion that is less than that of the metal of the metal layer.

According to one embodiment, a ceramic metal circuit board is a ceramic metal circuit board formed by bonding metal circuit plates to at least one surface of a ceramic substrate. At least one of the metal circuit plates has an area of not less than 100 mm.sup.2 and includes a concave portion having a depth of not less than 0.02 mm within a range of 1% to 70% of a surface of the at least one of the metal circuit plates. The concave portion is provided not less than 3 mm inside from an end of the metal circuit plate.

A composite substrate that includes: an upper ceramic layer; a lower ceramic layer; a middle resin layer between the upper ceramic layer and the lower ceramic layer; and a side surface resin layer on all side surfaces of the composite substrate, wherein the middle resin layer and the side surface resin layer are integral resin layers.