A resin multilayer substrate includes a stacked body including a first main surface, a cavity provided in the first main surface, and conductor patterns provided in the stacked body. The stacked body includes insulating substrate layers including resin as a main material that are stacked. The cavity includes a side surface and a bottom surface. At least a portion of a boundary between the side surface and the bottom surface includes conductor patterns continuous with the side surface and the bottom surface.

A multilayer wiring substrate includes a first wiring substrate including a plurality of stacked layers made of a thermosetting resin and having a wiring layer formed between each adjacent layers of the layers in a state in contact with the adjacent layers; a second wiring substrate made of a ceramic; and a joining layer disposed between a back surface of the first wiring substrate and a front surface of the second wiring substrate and configured to join the first wiring substrate and the second wiring substrate to each other. At least a surface of the joining layer adjacent to the second wiring substrate is made of a thermoplastic resin.

A multilayer substrate includes a laminate, first and second signal lines, first and second ground conductors, and interlayer connection conductors. The first and second signal lines extend along a transmission direction and include parallel extending portions that extend in parallel or substantially in parallel with each other. The first and second ground conductors sandwich the first and second signal lines in a laminating direction. The first and second ground conductors respectively include a first opening and a third opening between the signal lines when viewed from the laminating direction, and respectively include second openings and fourth openings disposed outside in a width direction orthogonal or substantially orthogonal to the transmission direction in the parallel extending portions when viewed from the laminating direction. The interlayer connection conductors are disposed in the transmission direction and at least between the signal lines.

A method may include forming a plurality of multilayer cores wherein each multilayer core comprises a sheet of cured dielectric material having a layer of metal on each side of the sheet of cured dielectric material, patterning each layer of metal in the plurality of multilayer cores to form wiring traces in each layer of metal, embedding a solder element in at least one sheet of a plurality of sheets of uncured dielectric material, wherein the solder element having a melting point temperature within a temperature range of a curing temperature of the uncured dielectric material, forming a printed circuit board by alternately stacking the plurality of multilayer cores with the plurality of sheets of uncured dielectric material between each multilayer core, laminating the stack of multilayer cores and sheets of uncured dielectric material to cause curing of the sheets of uncured dielectric material and melting of the solder element.

Methods for forming electrical circuitries on three-dimensional (3D) structures and devices made using the methods. A method includes forming selectively shaped 3D structures using additive manufacturing. The method includes forming undercuts on upper-level pedestals of the 3D structures that effectively act as overhanging deposition masks for selectively preventing deposition of a selected material on a corresponding portions of lower levels. The method includes simultaneously forming and electrically isolating materials directionally deposited on the 3D structure.

A circuit board structure includes a first sub-circuit board, a second sub-circuit board, and a third sub-circuit board. The first sub-circuit board has an upper surface and a lower surface opposite to each other, and includes at least one first conductive through hole. The second sub-circuit board is disposed on the upper surface of the first sub-circuit board and includes at least one second conductive through hole. The third sub-circuit board is disposed on the lower surface of the first sub-circuit board and includes at least one third conductive through hole. At least two of the first conductive through hole, the second conductive through hole, and the third conductive through hole are alternately arranged in an axial direction perpendicular to an extending direction of the first sub-circuit board. The first sub-circuit board, the second sub-circuit board, and the third sub-circuit board are electrically connected to one another.

An antenna module includes: a dielectric substrate including a multilayer structure, the dielectric substrate having a first surface and a second surface, the second surface being opposite the first surface; an antenna pattern formed on the first surface side of the dielectric substrate; a RFIC provided on the second surface of the dielectric substrate, the RFIC supplying a radio frequency signal to the antenna pattern; and a power supply line that supplies power to the RFIC, wherein the thickness of the power supply line in the stacking direction (Z axis direction) of the dielectric substrate is thicker than the thickness of the antenna pattern in the stacking direction.

The present invention relates to a support-attached resin film for an interlayer insulating layer, including a support, and a resin composition layer formed on one side surface of the support in which the support has particles exposed on the one side surface, and an average maximum height of exposed portions of the particles is 1.0 μm or less, or the support has no particles exposed on the one side surface, a multilayer printed wiring board using the support-attached resin film for an interlayer insulating layer, and the multilayer printed-wiring board.

A printed wiring board includes a resin insulating layer, a conductor layer formed on a surface of the resin insulating layer, an outermost insulating layer formed on the resin insulating layer such that the outermost insulating layer is covering the conductor layer and has an opening extending to the conductor layer, and a metal post formed in the opening of the outermost insulating layer such that the metal post is protruding from the outermost insulating layer.

A resin multilayer substrate includes a laminate including resin layers including a first resin layer and a second resin layer that are laminated, a via conductor in the first resin layer, and a joint portion that includes at least a portion in the second resin layer and is joined to the via conductor. The joint portion is more brittle than the via conductor. A linear expansion coefficient of the second resin layer is larger than a linear expansion coefficient of the via conductor and a linear expansion coefficient of the joint portion, and is smaller than a linear expansion coefficient of the first resin layer.