Abstract:
A multi-layer printed circuit board has a number of landing pads that are configured to engage a connector secured thereto. Between the landing pads associated with different signals is at least one micro via that is electrically connected to a ground plane on an outer surface of the multi-layer printed circuit board, and a ground plane on an inner layer of the multi-layer printed circuit board.
Abstract:
A hybrid electromagnetic bandgap (EBG) structure for broadband suppression of noise on printed wiring boards includes an array of coplanar patches interconnected into a grid by series inductances, and a corresponding array of shunt LC networks connecting the coplanar patches to a second conductive plane. This combination of series inductances and shunt resonant vias lowers the cutoff frequency for the fundamental stopband. The series inductances and shunt capacitances may be implemented using surface mount component technology, or printed traces. Patches may also be interconnected by coplanar coupled transmission lines. The even and odd mode impedances of the coupled lines may be increased by forming slots in the second conductive plane disposed opposite to the transmission line, lowering the cutoff frequency and increasing the bandwidth of the fundamental stopband. Coplanar EBG structures may be integrated into power distribution networks of printed wiring boards for broadband suppression of electromagnetic noise.
Abstract:
A micro via adapter socket (12) is provided by a printed circuit board (30) having an upper layer (32), a lower layer (40) and intermediate interconnect layers (34, 36 and 38). The lower layer (32) has an array of mini vias (60) formed therein for receiving respective ones of mini-springs (62). A top plate (42) is secured above the upper layer (32). The top plate (42) has a plurality of micro-pin recesses (54) spaced apart for registering with respective ones of the micro vias (48) and receiving micro-pins (52). A bottom plate (44) is secured beneath the lower layer (40). The bottom plate (44) has a plurality of mini-pin recesses (66) for removably receiving respective ones of the mini-pins (64). The intermediate interconnect layers (34, 36 and 38) have conductive tracks (76) which electrically connect between the micro vias (48) and the mini vias (60).
Abstract:
A base member includes: a core layer including: a plate-like body, made of aluminum oxide; and plural linear conductors, which penetrate through the plate-like body in a thickness direction of the plate-like body; a bonding layer, formed on at least one of a first surface and a second surface of the core layer; and a silicon layer or a glass layer, formed on the bonding layer.
Abstract:
A wiring board includes a core substrate having a structure including an insulating base material and a large number of filamentous conductors densely provided in the insulating base material and piercing the insulating base material in a thickness direction thereof. Pads made of portions of wiring layers are oppositely disposed on both surfaces of the core substrate and electrically connected to opposite ends of a plurality of filamentous conductors in such a manner that the pads share the filamentous conductors. A wiring connection between one surface side and the other surface side of the core substrate is made through the pads. The insulating base material is made of an inorganic dielectric. Pads made of portions of the wiring layers are disposed on both surfaces of the core substrate and electrically connected only to corresponding one end sides of different groups each formed of a plurality of filamentous conductors.
Abstract:
Methods for fabricating conductive structures on and/or in interposing devices and microfeature devices that are formed using such methods are disclosed herein. In one embodiment, a method for fabricating interposer devices having substrates includes forming a plurality of conductive sections on a first substrate in a first pattern. The method continues by forming a plurality of conductive sections on a second substrate in a second pattern. The method further includes constructing a plurality of conductive lines in a common third pattern on both the first substrate and the second substrate. The conductive lines can be formed on the first and second substrates either before or after forming the first pattern of conductive sections on the first substrate and/or forming the second pattern of conductive sections on the second substrate.
Abstract:
A circuit board and a heat radiating system of the circuit board. In the circuit board, a plurality of conductive layer regions coated with a conductor are separately formed on both sides of an insulating substrate, the conductive layer region formed on either side of an insulating region on each of the both sides of the insulating substrate, the plurality of the conductive layer regions includes a plurality of through holes which penetrate through the insulating substrate and are coated with a conductor over an inner wall, the conductor in the through hole electrically conducts the coated conductor of the plurality of the conductive layer regions, one of the lead pins is connected to one of the separated conductive layer regions on the both sides based on the insulating region, and the other lead pin is connected to the other conductive layer region. Accordingly, the efficient heat radiation of the circuit board can prevent the component malfunction, the lifespan reduction, the power consumption increase, and the illuminance drop.
Abstract:
An object of the present invention is to provide a capacitor-incorporated wiring substrate in which connection reliability can be improved through ensuring of a path for supply of electric potential even upon occurrence of a faulty connection in a via-conductor group. In a capacitor-incorporated wiring substrate of the present invention, a capacitor 50 is accommodated in a core 11, and a first and a second buildup layers 12 and 13 are formed on the upper and lower sides, respectively, of the capacitor 50. The capacitor-incorporated wiring substrate has a first via-conductor group to be connected to a first electric potential, and a second via-conductor group to be connected to a second electric potential. A first electrode pattern connected to the first via-conductor group, and a plurality of second electrode patterns connected to the second via-conductor group, are formed in a front-surface electrode layer 51 of the capacitor 50. A first conductor pattern connected to the first via-conductor group, and a plurality of second conductor patterns connected to the second via-conductor group, are formed in a proximate conductor layer 31 of a first buildup layer 12. Each of the second electrode patterns and each of the second conductor patterns connect a predetermined number of via electrodes and extend in such a manner as to be orthogonal to each other.
Abstract:
A substrate via structure for stacked vias in a substrate/chip assembly includes: a center via stack and a plurality of stacked vias clustered around the center via stack. In this structure, the center via and the surrounding vias are made of copper. Some of the surrounding vias may be non-functional vias and these may be of a different height than the functional vias.
Abstract:
A filter unit and a corresponding printed circuit board. The filter unit and the printed circuit board have been equipped with modified end portions being matched such that a number of filter units can be used on the printed circuit board without changing the printed circuit board.