Abstract: A printed wiring board includes a conductor layer, an outermost resin insulating layer having a first surface and a second surface on the opposite side with respect to the first surface and laminated on the conductor layer such that the second surface faces the conductor layer, and metal posts formed in the outermost resin insulating layer such that the metal posts are penetrating through the outermost resin insulating layer and reaching the conductor layer. The metal posts include first metal posts and second metal posts such that each of the first metal posts has a first upper surface positioned above the first surface of the outermost resin insulating layer and having an entirely flat surface and that each of the second metal posts has a second upper surface positioned above the first surface of the outermost resin insulating layer and having a partly flat surface.

Abstract: A printed wiring board includes a conductor layer, an outermost resin insulating layer having a first surface and a second surface on the opposite side with respect to the first surface and laminated on the conductor layer such that the second surface faces the conductor layer, and metal posts formed in the outermost resin insulating layer such that the metal posts are penetrating through the outermost resin insulating layer and reaching the conductor layer. The metal posts include first metal posts and second metal posts such that each of the first metal posts has a first upper surface positioned above the first surface of the outermost resin insulating layer and having an entirely flat surface and that each of the second metal posts has a second upper surface positioned above the first surface of the outermost resin insulating layer and having a partly flat surface.

Abstract: A printed wiring board includes a core substrate, a first resin insulating layer formed on a first surface of the core substrate, a second resin insulating layer formed on a second surface of the core substrate on the opposite side of the first surface, an electronic component accommodated in opening portion formed in the core substrate, and a filling resin filling space formed between the electronic component and an inner wall of the opening portion and including resin material that is different from resin material forming the first and second resin insulating layers. The core substrate has a first conductor pattern forming a first outermost layer of the core substrate and a second conductor pattern forming a second outermost layer of the core substrate on the opposite side of the first conductor pattern, and the filling resin is filling spaces formed in the second conductor pattern of the core substrate.

Abstract: A circuit substrate includes a core substrate having a cavity penetrating through the substrate, a metal block accommodated in the cavity of the substrate, a first build-up layer laminated on first side of the substrate and including insulating resin layers such that the first build-up layer is covering first surface of the block from the first side, and a second build-up layer laminated on second side of the substrate and including insulating resin layers such that the second build-up layer is covering second surface of the block from the second side. The first build-up layer includes an electronic component mounting structure formed on outermost portion of the first build-up layer, and the block is formed such that the first and second surfaces have roughened surfaces, respectively, and that the roughened surface of the first surface has surface roughness different from surface roughness of the roughened surface of the second surface.

Abstract: A wiring board includes a substrate which has multiple opening portions and one or more boundary portions separating the opening portions, multiple electronic devices positioned in the opening portions of the substrate, respectively, a conductive pattern formed on a surface of the boundary portion, and an insulation layer formed on the substrate and the conductive pattern on the boundary portion of the substrate such that the insulation layer covers the electronic devices in the opening portions of the substrate. The boundary portion has a width which is in a range of approximately 0.05 to approximately 2.0 mm.

Abstract: A circuit substrate includes a core substrate having a cavity, a metal block accommodated in the cavity of the core substrate, a first build-up layer including an insulating resin layer and laminated on a first surface of the core substrate such that the insulating resin layer is covering a first surface of the metal block in the cavity, and a second build-up layer including an insulating resin layer and laminated on a second surface of the core substrate such that the insulating resin layer is covering a second surface of the metal block in the cavity. The second build-up layer includes via conductors connected to the second surface of the metal block and common lands connecting the via conductors in parallel.

Abstract: A circuit substrate includes a core substrate having a cavity, a metal block accommodated in the cavity of the core substrate, a first build-up layer including an insulating resin layer and laminated on a first surface of the core substrate such that the insulating resin layer is covering a first surface of the metal block in the cavity, and a second build-up layer including an insulating resin layer and laminated on a second surface of the core substrate such that the insulating resin layer is covering a second surface of the metal block in the cavity. The second build-up layer includes via conductors connected to the second surface of the metal block and common lands connecting the via conductors in parallel.

Abstract: A wiring board includes a substrate which has multiple opening portions and one or more boundary portions separating the opening portions, multiple electronic devices positioned in the opening portions of the substrate, respectively, a conductive pattern formed on a surface of the boundary portion, and an insulation layer formed on the substrate and the conductive pattern on the boundary portion of the substrate such that the insulation layer covers the electronic devices in the opening portions of the substrate.

Abstract: A circuit substrate includes a core substrate having a cavity penetrating through the substrate, a metal block accommodated in the cavity of the substrate, a first build-up layer laminated on first side of the substrate and including insulating resin layers such that the first build-up layer is covering first surface of the block from the first side, and a second build-up layer laminated on second side of the substrate and including insulating resin layers such that the second build-up layer is covering second surface of the block from the second side. The first build-up layer includes an electronic component mounting structure formed on outermost portion of the first build-up layer, and the block is formed such that the first and second surfaces have roughened surfaces, respectively, and that the roughened surface of the first surface has surface roughness different from surface roughness of the roughened surface of the second surface.

Abstract: A method for manufacturing a multilayer printed wiring board includes preparing a metal layer having metal member portions and connector portions connecting the metal member portions, forming laminated multilayer structures having electronic components and the metal member portions, respectively, forming cut penetrating holes in the connector portions of the metal layer, respectively, such that the connector portions of the metal layer are cut, and forming interlayer insulation layers on the laminated multilayer structures such that the laminated multilayer structures are interposed between the interlayer insulation layers. The forming of the interlayer insulation layers includes filling the cut penetrating holes with a resin derived from one or more interlayer insulation layers on the laminated multilayer structures.

Abstract: A printed wiring board includes a core substrate having a penetrating hole extending through the core substrate, an electronic component accommodated in the penetrating hole of the core substrate, a filler resin filling clearance between the component and the core substrate, a first resin insulation layer formed on the component and a first surface of the core substrate, and a second resin insulation layer formed on the component and a second surface of the core substrate on the opposite side of the first surface of the core substrate. The filler resin has elastic modulus which is set to be lower than 0.2 Gpa and thermal expansion coefficient which is set to be higher than 100 ppm and lower than 200 ppm, and the core substrate has elastic modulus which is set to be higher than 30 Gpa, and thermal expansion coefficient which is set to be lower than 10 ppm.

Abstract: A wiring board includes a substrate having an opening portion, multiple electronic devices positioned in the opening portion such that the electronic devices are arrayed in the lateral direction of each of the electronic devices, and an insulation layer formed on the substrate such that the insulation layer covers the electronic devices in the opening portion of the substrate. The substrate has a wall surface defining the opening portion and formed such that the opening portion is partially partitioned and the electronic devices are kept from making contact with each other.

Abstract: A wiring board includes a substrate which has multiple opening portions and one or more boundary portions separating the opening portions, multiple electronic devices positioned in the opening portions of the substrate, respectively, a conductive pattern formed on a surface of the boundary portion, and an insulation layer formed on the substrate and the conductive pattern on the boundary portion of the substrate such that the insulation layer covers the electronic devices in the opening portions of the substrate. The boundary portion has a width which is in a range of approximately 0.05 to approximately 2.0 mm.

Abstract: A wiring board including a substrate having opening penetrating from first to second surfaces, an electronic component in the opening having first and second electrodes, a first insulation layer over the first surface, a second insulation layer over the second surface, a first via conductor in the first layer having bottom connected to the first electrode, a second via conductor in the first layer having bottom connected to the second electrode, a third via conductor in the second layer having bottom connected to the first electrode, and a fourth via conductor in the second layer having bottom connected to the second electrode. The first conductor is longer than the third conductor and has the bottom having greater width than the bottom of the third conductor, and the second conductor is longer than the fourth conductor and has the bottom having greater width than the bottom of the fourth conductor.

Abstract: A printed wiring board includes a core substrate, an electronic component accommodated in the substrate, a first buildup structure formed on surface of the substrate and including an interlayer insulation layer, and a second buildup structure formed on the opposing surface of the substrate and including an interlayer insulation layer. The substrate includes a core material portion including multiple resin layers, a first conductive layer formed on first surface of the core portion and a second conductive layer formed on second surface of the core portion, the core portion has opening through the resin layers and accommodating the component, the insulation layer of the first structure is positioned such that the opening of the core portion is covered on the first surface, and the insulation layer of the second structure is positioned such that the opening of the core portion is covered on the second surface.

Abstract: A wiring board includes a substrate having an opening portion, electronic components positioned in the opening portion of the substrate and including first and second electronic components, and an insulation layer formed over the substrate and the first and second components. The first component has first and second electrodes having side portions on side surfaces of the first component, the second component has first and second electrodes having side portions on side surfaces of the second component, the first electrode of the first component and the first electrode of the second component are set to have substantially the same electric potential, and the first component and the second component are positioned in the opening portion of the substrate such that the side portion of the first electrode of the first component is beside the side portion of the first electrode of the second component.

Abstract: A method for forming cavity in substrate includes setting start position on closed loop line having circumference L for substrate, consecutively irradiating laser from laser device upon board for the substrate such that holes are formed, and moving the device in loop from the start position along the line such that penetrating hole is formed through the board. The start position of first loop is set as base position, the moving includes shifting the start position by distance d after each loop and controlling such that the moving satisfies p=?di, m?L/p and M=m×n, where i=1 to n, n represents number of loops, p represents pitch of the holes, m represents number of the holes in loop, ?di is distance from the base position for the start position after i-th loop, and M is number of the holes by the loops.

Abstract: A multilayered printed circuit board or a substrate for mounting a semiconductor device includes a semiconductor device, a first resin insulating layer accommodating the semiconductor device, a second resin insulating layer provided on the first resin insulating layer, a conductor circuit provided on the second resin insulating layer, and via holes for electrically connecting the semiconductor device to the conductor circuit, wherein the semiconductor device is accommodated in a recess provided in the first resin insulating layer, and a metal layer for placing the semiconductor device is provided on the bottom face of the recess. A multilayered printed circuit board in which the installed semiconductor device establishes electrical connection through the via holes is provided.

Abstract: A method for manufacturing a multilayered printed circuit board including forming a first insulating resin substrate having a metal layer substantially corresponding to dimensions of a semiconductor device, forming a second insulating resin substrate, forming a recess extending to the metal layer of the first insulating resin substrate such that a surface of the metal layer is exposed, accommodating the semiconductor device in the recess such that the semiconductor device is mounted on the surface of the metal layer, and forming a resin insulating layer on the first insulating resin substrate such that the semiconductor device accommodated in the recess is covered.

Abstract: A printed wiring board includes a substrate having an accommodation section having multiple opening portions, multiple electronic components accommodated in the opening portions, respectively, a filler resin provided in the opening portions in the substrate such that the electronic components are secured in the opening portions in the substrate, a resin insulation layer formed over the substrate and the electronic components, a conductive layer formed on the resin insulation layer, and via conductors formed in the resin insulation layer and connecting the conductive layer and the electronic components. The opening portions are connected to each other.