Abstract:
A wiring board includes a first insulating layer made of a single layer of non-photosensitive resin including a reinforcing member, a center position of the reinforcing member being positioned on a side toward a first surface with respect to a center of the first insulating layer in a thickness direction; a layered structure of a wiring layer and an insulating layer, stacked on the first surface of the first insulating layer; a through wiring provided to penetrate the first insulating layer, the through wiring and the first insulating layer forming a first concave portion at a second surface of the first insulating layer, in which the second end surface of the through wiring is exposed; and a pad for external connection formed at the second surface of the first insulating layer at a position corresponding to the through wiring and having a second concave portion.
Abstract:
A wiring substrate includes a first wiring structure, a second wiring structure stacked on an upper surface of the first wiring structure, and an outermost insulating layer stacked on a lower surface of the first wiring structure. The outermost insulating layer covers a part of a bottom wiring layer of the wiring layers forming the first wiring structure. The second wiring structure has a wiring density higher than that of the first wiring structure. A volume ratio V1/V2 is from 0.8 to 1.5, where V1 represents the volume of the wiring layers forming the entire second wiring structure, and V2 represents the volume of the bottom wiring layer in the first wiring structure.
Abstract:
A wiring substrate includes first and second wiring structures. The first wiring structure includes a core substrate, first and second insulation layers formed from a thermosetting insulative resin respectively including first and second reinforcement materials, and a via wire formed in the first insulation layer. The second wiring structure includes a third insulation layer formed on an upper surface of the first insulation layer and an upper end surface of the via wire, and a wiring layer extended through the third insulation layer and electrically connected to the via wire. The outermost insulation layer, the main component of which is a photosensitive resin, is stacked on a lower surface of the second insulation layer. The second wiring structure has a higher wiring density than the first wiring structure. The first reinforcement material is partially exposed on the upper surface of the first insulation layer.
Abstract:
A wiring board includes a first insulating layer coating a first wiring layer. A first through hole is opened in a surface of the first insulating layer and exposes a surface of the first wiring layer. A first via arranged in the first through hole includes an end surface exposed to the surface of the first insulating layer. A gap is formed between the first insulating layer and the first via in the first through hole. A second wiring layer is stacked on the surface of the first insulating layer and the end surface of the first via. The second wiring layer includes a pad filling the gap. The pad is greater in planar shape than the first through hole.
Abstract:
A wiring board includes an interconnect structure including a plurality of interconnect layers, and a plurality of insulating layers having a photosensitive resin as a main component thereof, and an encapsulating resin layer having a non-photosensitive thermosetting resin as a main component thereof, laminated on an uppermost insulating layer of the plurality of insulating layers. An uppermost interconnect layer of the plurality of interconnect layers includes a pad protruding from the uppermost insulating layer. The encapsulating resin layer exposes an upper surface of the pad, and covers at least a portion of a side surface of the pad, and at least a portion of side surfaces of the plurality of insulating layers. The pad is configured to receive a semiconductor chip to be mounted thereon.
Abstract:
An interconnect substrate includes a core layer including a resin layer mainly composed of a non-photosensitive thermosetting resin and a through interconnect extending through the resin layer, the core layer having no reinforcement member contained therein, a first interconnect structure laminated on a first side of the core layer and including first interconnect layers and first insulating layers mainly composed of a photosensitive resin, and a second interconnect structure laminated on a second side of the core layer and including second interconnect layers and a single second insulating layer mainly composed of a photosensitive resin, wherein the first interconnect layers are electrically connected to the second interconnect layers via the through interconnect, wherein the core layer has greater rigidity than the first interconnect structure and the second interconnect structure, and wherein a thickness of the second interconnect structure is greater than a thickness of each of the first insulating layer.
Abstract:
A wiring board includes a first interconnect structure including a first interconnect layer, and a first insulating layer including a non-photosensitive thermosetting resin as a main component thereof, a second interconnect structure including second interconnect layers, and second insulating layers including a photosensitive resin as a main component thereof, and laminated on the first interconnect structure, and an encapsulating resin layer including a non-photosensitive thermosetting resin as a main component thereof, and laminated on an uppermost second insulating layer. An uppermost second interconnect layer includes a pad protruding from the uppermost second insulating layer. The encapsulating resin layer exposes a top surface of the pad, and covers at least a portion of a side surface of the pad. Thermal expansion coefficients of the first insulating layer and the encapsulating resin layer are lower than that of the second insulating layers.
Abstract:
A wiring substrate includes an insulating layer including a projection and a wiring layer on the projection. The wiring layer includes a first metal layer on an end face of the projection and a second metal layer on the first metal layer. The width of the end face of the projection is different from at least one of the width of the first metal layer and the width of the second metal layer. An inner wall surface and a bottom surface of a depression around the projection are roughened surfaces.
Abstract:
A wiring substrate includes a core layer, a first wiring layer, a first insulating layer, a first via wiring, a second wiring layer, a second insulating layer, a second via wiring, a third wiring layer, a third insulating layer, a third via wiring, and a through-wiring. The through-wiring includes upper and lower end surfaces. The upper end surface has an area that is smaller than an area of the lower end surface. The upper surface of the first insulating layer is more flat than the lower surface of the third insulating layer. The second wiring layer has a wiring density that is higher than a wiring density of the first wiring layer.
Abstract:
A wiring substrate includes, a base wiring substrate including a first wiring layer, a first insulating layer in which the first wiring layer is buried and a first via hole is formed under the first wiring layer, and a second wiring layer formed under the first insulating layer and connected to the first wiring layer through the first via hole, and a re-wiring portion including a second insulating layer formed on the base wiring substrate and having a second via hole formed on the first wiring layer, and a re-wiring layer formed on the second insulating layer and connected to the first wiring layer through the second via hole. The re-wiring layer is formed of a seed layer and a metal plating layer provided on the seed layer, and the seed layer is equal to or wider in width than the metal plating layer.