Abstract:
A high-frequency Electromagnetic Bandgap (EBG) device (70,90), and a method (100) for making the device are provided. The device (70,90) includes a first substrate (72) including multiple conducting vias (74) forming a periodic lattice. The vias (74) ofthe first substrate (72) extend from the lower surface ofthe first substrate (72) to the upper surface of the first substrate (72). The device (70,90) also includes a second substrate (76) having multiple conducting vias (78) forming a periodic lattice. The vias (78) ofthe second substrate (76) extend from the lower surface of the second substrate (76) to the upper surface of the second substrate (76). The second substrate (76) is positioned adjacent to, and overlapping, the first substrate (72), such that the lower surface of the second substrate (76) is in contact with the upper surface of the first substrate (72), and such that a plurality of vias (78) of the second substrate (76) are in contact with a corresponding plurality of vias (74) of the first substrate (72).
Abstract:
In a transmission circuit board, ground terminal portions (10) are disposed at every other two rows in both end columns. Each of signal circuit layers (20) includes at least a pair of adjacent signal connecting portions electrically connected to a pair of the wiring portions (21, 22) arranged in parallel in a row direction and the column direction different from those on an adjacent signal circuit layer. Each of the ground layers is electrically connected to at least one of the ground terminal portions (10) in the both end columns.
Abstract:
A cooling scheme for an LED based back-light in a liquid crystal display (LCD) is disclosed. A circuit board (10) in the LED backlight (300) of the LCD (100) has a thermally (and (optionally) electrically) conductive material (M) arranged to completely fill at least one through-hole (H) joining its front (101) and back (102) surfaces in order to facilitate the efficient removal of heat from at least one LED (40) mounted its the front surface. The high thermal conductivity material can have a large surface area at the back side of the circuit board in order to further increase heat removal. An additional thermally conducting medium (20) in contact with the material (M) ensures efficient heat transport to a surrounding frame (30), which acts as a heat sink. The holes in the PCB may be located in regions between the LEDs or under them. They may have different sizes. Larger holes may be provided under the LEDs. The material in the holes may also be electrically conducting to allow an electric contact to the LED terminals (41) to be made. The further thermally conducting medium may be a three layer structure, the two outer layers which are electrically insulating sandwiching an electrically conductive middle layer.
Abstract:
The present invention comprises a processed thin film substrate (10) and a method therefore, in order to produce a flexible printed circuit card, having a plurality of microvias going or passing through the thin film substrate and electrically connected along faced-away surfaces, in order to form an electric circuit. A first a number of real nano-tracks are filled with a first material (M1), having good electric properties, for the formation of a first number of, here denominated, first vias (V10, V30, V50), that a second number of real nano-tracks are filled with a second material (M2), having good electric properties, for the formation of a second number of, here denominated, second vias (V20, V40, V60). The first material (M1) and the second material (M2) of said first and second vias (V10-V60) are chosen having mutually different thermoelectric properties. A material surface-applied to the thin film substrate, coated on both sides (10a, 10b) of the thin film substrate (10), is distributed and/or adapted in order to allow the electrical interconnection of first vias, allocated the first material (M1), with second vias, allocated the second material (M2), and that a first via (V10) included in a series connection and a last via (V60) included in the series connection are serially co-ordinated in order to form an electric thermocouple (100) or other circuit arrangement.
Abstract:
In a core substrate 30, a ground through hole 36E and a power through hole 36P are disposed in the grid formation, so that electromotive force induced in X direction and Y direction cancel out each other. As a result, even if mutual inductance is reduced and a high frequency IC chip is loaded, electric characteristic and reliability can be improved without generating malfunction or error.
Abstract:
Substrate (7; 7'; 10) and devices including such a substrate, the substrate having a first surface and a second surface extending substantially in parallel to the first surface, the substrate being of a material of a first conductivity and provided with a plurality of electrically conducting channels (21) which are extending exclusively in a direction perpendicular to the first and second surfaces, said channels having a second conductivity substantially larger than the first conductivity, the substrate being provided with at least one electrode (42) on either one of the first and second surfaces, contacting at least one of said channels, the at least one electrode (42) having a predetermined minimum dimension (D) in a contact area (A) with the substrate, and mutual distances between adjacent ones of the plurality of channels (21) being smaller than said minimum dimension of said at least one electrode (42).
Abstract:
An assembly of two or more microelectronic parts, wherein electrical and/or thermal interconnection between the parts is achieved by means of multiple, discrete, conductive nanoscopic fibrils (15) or tubules (15) fixed within the pores of an insulating film (16). Such a film is said to have anisotropic electrical conductivity, i.e., Z-axis conductivity, with little or no conductivity in the other directions.
Abstract:
The invention relates to a method of making a multi-layer circuit assembly. Said method comprises the steps of providing a first circuit panel (544) having a dielectric body with oppositely directed top and bottom surfaces, contacts (538) on its top surface at locations of a first pattern, terminals (530) on its bottom surface, and through-conductors (527) electrically connected to said terminals and extending to the top surface of the panel, and a second circuit panel (562) having a dielectric body with a bottom surface and terminals (530) at locations of said first pattern on the bottom surface of such panel, said providing step including the step of customizing said first circuit panel by selectively treating the top surface of such panel so that less than all of the through conductors of such panel are connected to contacts of such panel; stacking said circuit panels in superposed, top-surface to bottom surface relation so that the top surface of said first circuit panel faces the bottom surface of said second circuit panel at a first interface and said first patterns on said facing surfaces are in registration with one another, with said contacts of said first panel being aligned with said terminals of said second panel at least some locations of said inregistration patterns; and non-selectively connecting all of said aligned contacts and terminals at said interface, whereby less than all of said through conductors of said customized panel are connected to terminals of said adjacent panel. The invention also relates to a multi-layer circuit assembly.
Abstract:
Eine Grundplatte (1) für elektrische Stromkreise besteht aus einem isolierenden, mit Durchgangslöchern (2) versehenen Schicht körper. Damit die elektrischen Stromkreise einfacher und schneller hergestellt werden können, sind die Durchgangslöcher (2) kegelstumpfförmig, wobei der größere Durchmesser des Kegel stumpfs größer und der kleinere Durchmesser des Kegelstumpfs kleiner ist als der Durchmesser der Anschlußteile der zu verbin denden elektrischen Bauteile (Fig. 2).