Abstract:
A multilayer printed wiring board comprises a plurality of insulating layers which is about 100 μm or less in thickness and a plurality of conductor circuits formed on the insulating layers. Each of a plurality of viaholes electrically connecting conductor circuits on the insulating layers to each other is formed tapered inwardly from the surface of the insulating layer and the viaholes are disposed opposite to each other to form a multistage stacked vias.
Abstract:
A multilayer printed circuit board, wherein, on a resin-insulating layer that houses a semiconductor element, another resin-insulating layer and a conductor circuit are formed with conductor circuits electrically connected through a via hole, wherein a electromagnetic shielding layer is formed on a resin-insulating layer surrounding a concave portion for housing a semiconductor element or on the inner wall surface of the concave portion, and the semiconductor element is embedded in the concave portion.
Abstract:
A multilayer printed wiring board comprises insulating layers and conductor layers being stacked alternately on each other. The conductor layers are electrically connected to each other through viaholes formed in the insulating layers. Each of the viaholes is formed to bulge in a direction generally orthogonal to the direction of thickness of the insulating layer. The multilayer printed wiring board is to have electronic components such as a capacitor, IC and the like mounted on the surface layer thereof.
Abstract:
A wiring board includes an insulating board, wiring sub boards, and insulating layers having via holes in which conductors are formed by plating. The insulating board and the wiring sub boards are horizontally laid out. The insulating layers are laid out to respectively cover a first boundary portion between the insulating board and each of the wiring sub boards, and a second boundary portion between the wiring sub boards, and continuously extend from the insulating board to wiring sub boards. Resins which constitute the insulating layers are filled in the first boundary portion and the second boundary portion. The conductors are electrically connected to the wiring layers.
Abstract:
A flex-rigid wiring board includes a first rigid substrate, a second rigid substrate arranged at a distance from the first rigid substrate to provide a space between the first and second rigid substrates and a flexible substrate. The flexible substrate includes a first tip portion connected to the first rigid substrate, and a second tip portion connected to the second rigid substrate such that the first and second rigid substrates are connected to each other by way of the flexible substrate. At least one bending portion is formed between the first and second tip portions of the flexible substrate, each of the at least one bending portions is provided in the space between the first and second rigid substrates.
Abstract:
A wiring board and method of forming a wiring board including a first substrate, a second substrate having a smaller mounting area than a mounting area of the first substrate, and a base substrate laminated between the first substrate and the second substrate, such that the first substrate extends beyond an edge of the second substrate. An IVH (Interstitial Via Hole) or through hole penetrates the base substrate and vias are formed in at least one of the first substrate or the second substrate.
Abstract:
A wiring board and a method of forming a wiring board including a first substrate, a second substrate having a smaller mounting area than a mounting area of the first substrate, and a base substrate laminated between the first substrate and the second substrate such that the first substrate extends beyond an edge of the second substrate. An IVH (Interstitial Via Hole) penetrates the base substrate.
Abstract:
A multilayer printed wiring board comprises insulating layers and conductor layers being stacked alternately on each other. The conductor layers are electrically connected to each other through viaholes formed in the insulating layers. Each of the viaholes is formed to bulge in a direction generally orthogonal to the direction of thickness of the insulating layer. The multilayer printed wiring board is to have electronic components such as a capacitor, IC and the like mounted on the surface layer thereof.
Abstract:
This invention provides a multilayer printed wiring board in which electric connectivity and functionality are obtained by improving reliability and particularly, reliability to the drop test can be improved. No corrosion resistant layer is formed on a solder pad 60B on which a component is to be mounted so as to obtain flexibility. Thus, if an impact is received from outside when a related product is dropped, the impact can be buffered so as to protect any mounted component from being removed. On the other hand, land 60A in which the corrosion resistant layer is formed is unlikely to occur contact failure even if a carbon pillar constituting an operation key makes repeated contacts.