Abstract:
A method for manufacturing a wiring substrate includes forming a conductor layer including first and second pads, forming a resin insulating layer on the conductor layer, forming, in the insulating layer, a first opening exposing the first pad and a second opening exposing the second pad, forming a covering layer on the insulating layer such that the covering layer covers the first and second openings, forming a third opening in the covering layer such that the third opening communicates with the first opening and the first pad is exposed in the third opening, forming, on a surface of the first pad, a protective film formed of material different from material forming the conductor layer, removing the covering layer from the insulating layer, and forming a conductor post on the second pad such that the conductor post is formed of material that is same as the material forming the conductor layer.
Abstract:
A wiring substrate includes insulating layers including a first insulating layer such that the first insulating layer is positioned at one end of the insulating layers in lamination direction and has an accommodating portion through the first insulating layer, conductive layers laminated on the insulating layers and including a first conductive layer formed on one end side of the first insulating layer in the lamination direction and a second conductive layer formed on the opposite side, and a semiconductor element accommodated in the accommodating portion of the first insulating layer. The insulating layers include the first insulating layer including reinforcing material and a second insulating layer laminated on the first insulating layer such that the second insulating layer is covering the second conductive layer and the semiconductor element and filling gap formed between the first insulating layer and semiconductor element in the accommodating portion and does not contain reinforcing material.
Abstract:
A printed wiring board includes a first insulation layer, an electronic component built into the first insulation layer, a second insulation layer having a via conductor and formed on a first surface of the first insulation layer, and a conductive film formed on the first insulation layer on the opposite side with respect to the first surface of the first insulation layer such that the conductive film is positioned to face a back surface of the electronic component. The first insulation layer has a coefficient of thermal expansion which is set higher than a coefficient of thermal expansion of the second insulation layer.
Abstract:
A wiring board with a built-in electronic component includes a substrate having a cavity, an electronic component accommodated in the cavity and having electrode terminals, an insulating layer formed on the substrate such that the insulating layer is covering the electronic component in the cavity, and via conductors formed through the insulating layer and including first via conductors and second via conductors such that the second via conductors are connected to the electrode terminals of the electronic component, respectively. The via conductors are formed in via formation holes penetrating through the insulating layer, respectively, and the via formation holes include first via formation holes and second via formation holes such that the second via formation holes are exposing the electrode terminals of the electronic component, respectively, and that a second via formation hole has a diameter which is smaller than a diameter of a first via formation hole.
Abstract:
A wiring board for a built-in electronic component includes a substrate having a cavity portion, an electronic component accommodated in the cavity portion of the substrate, a filling resin material filling a space formed between the electronic component and an inner wall of the substrate forming the cavity portion, an insulation layer formed on the substrate and the electronic component accommodated in the cavity portion of the substrate, and a via conductor formed in the insulation layer such that the via conductor is connected to a connection terminal of the electronic component. The substrate has projection portions formed on the inner wall of the substrate such that the projection portions project toward the electronic component accommodated in the cavity portion of the substrate.
Abstract:
A method for manufacturing a wiring substrate includes forming conductor pads on a surface of an insulating layer, positioning, on or in the insulating layer, an electronic component having electrode pads, forming a second insulating layer covering the surface of the insulating layer, conductor pads and electronic component, forming first via holes exposing the conductor pads, applying a first desmear treatment to the second insulating layer such that residues are removed from the first via holes, forming second via holes in the second insulating layer after the first desmear treatment such that the second via holes expose the electrode pads of the electronic component positioned on or in the insulating layer, applying a second desmear treatment to the second insulating layer such that residues are removed from the second via holes, forming first via conductors in the first via holes, and forming second via conductors in the second via holes.
Abstract:
A semiconductor package includes a printed wiring board, a logic IC mounted on a first surface of the board, a connector mounted on a second surface of the board on the opposite side with respect to the first surface, an optical element that converts an optical signal and an electrical signal and positioned on the opposite side with respect to the first surface such that the optical element is at least partially embedded in the board, a path that is formed in the board and electrically connects the logic IC on the first surface and the optical element on the opposite side with respect to the first surface, and an optical waveguide that is embedded on the opposite side with respect to the first surface and optically connects the connector on the second surface and the optical element on the opposite side with respect to the first surface.
Abstract:
A wiring board with a cavity for a built-in electronic component includes a conductor layer including a conductor circuit layer and a plane layer, and an insulating layer laminated on the conductor layer and having a cavity such that the cavity is forming an exposed portion of the plane layer and formed to mount a built-in electronic component on the exposed portion of the plane layer. The plane layer has a recess structure formed in an outer peripheral portion in the exposed portion of the plane layer.
Abstract:
A wiring substrate includes a first wiring part including a first insulating layer and a first conductor layer laminated on the first insulating layer, and a second wiring part including a second insulating layer and a second conductor layer laminated on the second insulating layer. The thickness of the second insulating layer is smaller than that of the first insulating layer. The thickness of the second conductor layer is smaller than that of the first conductor layer. The first conductor layer includes first wirings including differential wirings having the minimum wiring width of larger than 5 μm and minimum inter-wiring distance of larger than 7 μm. The second conductor layer includes second wirings having the maximum wiring width of 5 μm or less and the maximum inter-wiring distance of 7 μm or less. The second part is positioned closer to the outermost surface of the substrate than the first part.
Abstract:
A wiring substrate includes first conductor pads formed on a surface of an insulating layer, second conductor pads formed on the surface of the insulating layer, a second insulating layer covering the surface of the insulating layer and first and second conductor pads, first via conductors formed in first via holes penetrating through the second insulating layer such that the first via conductors are formed on the first conductor pads, and second via conductors formed in second via holes penetrating through the second insulating layer such that the second via conductors are formed on the second conductor pads. The first and second conductor pads are formed such that an annular width amount of each second conductor pad is smaller than an annular width amount of each first conductor pad and that a haloing amount in each second conductor pad is smaller than a haloing amount in each first conductor pad.