Abstract:
A printed wiring board semiconductor package (5000) or PWB power core comprising singulated capacitors embedded on multiple layers of the printed wiring board semiconductor package wherein at least a part of each embedded capacitor lies within the die shadow (650) and wherein the embedded, singulated capacitors comprise at least a first electrode (230) and a second electrode (270). The first electrodes and second electrodes of the embedded singulated capacitors are interconnected to the Vcc (power) terminals and the Vss (ground) terminals respectively of a semiconductor device. The size of the embedded capacitors are varied to produce different self-resonant frequencies and their vertical placements within the PWB semiconductor package are used to control the inherent inductance of the capacitor-semiconductor electrical interconnections so that customized resonant frequencies of the embedded capacitors can be achieved with low impedance.
Abstract:
A process for manufacturing a multilayer printed circuit board comprises a step for providing openings in an interlayer insulating layer (4002), and a step for filling up the openings with a plating metal to construct via holes (4007) and, at the same time, build up an upper-layer conductor layer (4005). The electroplating is performed using an aqueous solution containing a metal ion and 0.1 to 1.5 mmol/L of at least one additive selected from the group consisting of thioureas, cyanides and polyalkylene oxides as a plating solution.
Abstract:
A build-up multilayer printed circuit board in which an interlaminar insulating layer (2) and a conductor layer (5, 5') are alternately laminated on at least one surface of a wiring substrate (1) having a conductor circuit and a through-hole (9), and the conductor layers (5, 5') are electrically connected to each other through a viahole (7) formed in the interlaminar insulating layer (2), characterized in that a roughened layer (11) is formed on the surface of the conductor in an inner wall of the through-hole (9), and a resin filler comprising a resin and inorganic particles is filled in the through-hole (9) formed in the substrate (1).
Abstract:
The optical/electrical composite wiring board 10 comprises a lower insulating layer 32 that also serves as a lower clad 22; a upper insulating layer 34 that also serves as an upper clad 24; a core 26 that is placed between the lower insulating layer 32 and the upper insulating layer 34 and has a predetermined optical wiring pattern; and a conductor layer 40 that is placed along with the core 26 between the lower insulating layer 32 and the upper insulating layer 34 and has a predetermined electrical wiring pattern. Herein, the core 26 and the conductor layer 40 are formed via a short manufacturing method, whereby the concave portion for optical wiring 32a and the concave portion for electrical wiring 32b are formed on the lower insulating layer 32 by press process, and a core material and conductor material are filled into each of the concave portions 32a and 32b, and afterward, the core material and conductor material are ground until they are flush with the upper surface of the lower insulating layer 32.
Abstract:
A circuit information acquisition and conversion device, a method, and a program therefor for acquiring a layer (2) (3) configuration, wire traces (2) and shapes of via holes (4) from circuit board design information; optimizing, before conversion into an analysis model, the output target range of the via holes (4) on the basis of a package area, heat density distribution, and power consumption; and creating an analysis model that is suitable for a purpose of the analysis are provided.
Abstract:
A multi-chip electronic package (111) which utilizes an organic, laminate chip carrier (300) and a pair of semiconductor chips (77', 77") positioned on an upper surface of the carrier in a stacked orientation. The organic, laminate chip carrier (300) is comprised of a plurality of conductive planes and dielectric layers and couples one or both of the chips to underlying conductors on the bottom surface thereof. The carrier may include a high-speed portion to assure high-frequency connection between the semiconductor chips and may also include an internal capacitor and/or thermally conductive member for enhanced operational capabilities. The first chip (77'), e.g., an ASIC chip, is solder bonded (79) to the carrier (300) while the second chip (77"), e.g., a memory chip, is secured to the first chip's upper surface and coupled to the carrier using a plurality of wirebond connections (113).
Abstract:
Disclosed is a small-sized multilayer printed wiring board wherein the degree of freedom in design is improved. Such a multilayer printed wiring board is easily applicable to high density wiring. Specifically disclosed is a multilayer printed wiring board wherein a plurality of insulating layers, a conductor circuit and an optical wiring are formed in layers and on which an optical device is mounted. Such a multilayer printed wiring board is characterized in that the optical wiring is formed between the insulating layers.
Abstract:
A circuit device for interconnecting first and second multilayer circuit boards is described herein. The first multilayer circuit board may include a first plurality of electrically conductive vias of varying depths and the second multilayer circuit board may include a second plurality of electrically conductive vias. The circuit device comprises a first plurality of pins located on a first side of the circuit device corresponding to the first plurality of electrically conductive vias of the first multilayer circuit board, each pin having a length compatible with a depth of a respective one of the first plurality of electrically conductive vias of the first multilayer circuit board. The circuit device further comprises a second plurality of pins located on a second side of the circuit device corresponding to the second plurality of electrically conductive vias of the second multilayer circuit board.
Abstract:
A multilayered printed circuit board (200) comprising a substrate and, as serially built up thereon, a conductor circuit and an interlaminar resin insulating layer in an alternate fashion and in repetition, and a solder resist layer (114) formed further thereon as an outermost layer, with a connection of said conductor circuits through said interlaminar resin insulating layer being performed by a via-hole, wherein via-holes in different level layers among said via-holes (1072) are piled on one another, and among said piled via-holes, the via-hole (1071) in the uppermost level has a concave portion formed thereon.