Abstract:
A method for forming embedded capacitors on a printed circuit board is disclosed. The capacitor is formed on the printed circuit board by a depositing a first dielectric layer over one or more electrodes situated on the PCB. Another electrode is formed on top of the first dielectric layer and a second dielectric layer is deposited on top of that electrode. A third electrode is formed on top of the second dielectric layer. The two dielectric layers are abrasively delineated in a single step by a method such as sand blasting to define portions of the first and second dielectric layers to create a multilayer capacitive structure.
Abstract:
A method is for fabricating an embedded capacitance printed circuit board assembly (400, 1100). The embedded capacitance printed circuit board assembly includes two embedded capacitance structures (110). Each capacitance structure (110) includes a crystallized dielectric oxide layer (115) sandwiched between an outer electrode layer (120) and an inner electrode layer (125) in which the two inner electrode layers are electrically connected together. A rivet via (1315) and a stacked via (1110) formed from a button via (910) and a stacked blind via (1111) may be used to electrically connect the two inner electrode layers together. A spindle via (525) may be formed through the inner and outer layers. The multi-layer printed circuit board may be formed from a capacitive laminate (100) that includes two capacitance structures.
Abstract:
A method is disclosed for fabricating a patterned embedded capacitance layer. The method includes fabricating (1305, 1310) a ceramic oxide layer (510) overlying a conductive metal layer (515) overlying a printed circuit substrate (505), perforating (1320) the ceramic oxide layer within a region (705), and removing (1325) the ceramic oxide layer and the conductive metal layer in the region by chemical etching of the conductive metal layer. The ceramic oxide layer may be less than 1 micron thick.
Abstract:
A method is for fabricating an embedded capacitance printed circuit board assembly (400, 1100). The embedded capacitance printed circuit board assembly includes two embedded capacitance structures (110). Each capacitance structure (110) includes a crystallized dielectric oxide layer (115) sandwiched between an outer electrode layer (120) and an inner electrode layer (125) in which the two inner electrode layers are electrically connected together. A rivet via (1315) and a stacked via (1110) formed from a button via (910) and a stacked blind via (1111) may be used to electrically connect the two inner electrode layers together. A spindle via (525) may be formed through the inner and outer layers. The multi-layer printed circuit board may be formed from a capacitive laminate (100) that includes two capacitance structures.
Abstract:
A method is disclosed for fabricating a patterned embedded capacitance layer. The method includes fabricating (1305, 1310) a ceramic oxide layer (510) overlying a conductive metal layer (515) overlying a printed circuit substrate (505), perforating (1320) the ceramic oxide layer within a region (705), and removing (1325) the ceramic oxide layer and the conductive metal layer in the region by chemical etching of the conductive metal layer. The ceramic oxide layer may be less than 1 micron thick.
Abstract:
A dielectric circuit board foil (400, 600) includes a conductive metal foil layer (210, 660), a crystallized dielectric oxide layer (405, 655) disposed adjacent a first surface of the conductive metal foil layer, a lanthanum nickelate layer (414, 664) disposed on the crystallized dielectric oxide layer, and an electrode layer (415, 665) that is substantially made of one or more base metals disposed on the lanthanum nickelate layer. The foil (400, 600) may be adhered to a printed circuit board sub-structure (700) and used to economically fabricate a plurality of embedded capacitors, including isolated capacitors of large capacitive density (> 1000 pf/mm²).
Abstract translation:电介质电路板箔(400,600)包括导电金属箔层(210,660),邻近导电金属箔层的第一表面设置的结晶介电氧化物层(405,655),镍酸镧层(414) ,664)和基本上由设置在镍酸镧层上的一种或多种贱金属制成的电极层(415,665)。 箔(400,600)可以粘附到印刷电路板子结构(700)上,并用于经济地制造多个嵌入式电容器,包括具有大电容密度(> 1000pf / mm 2)的隔离电容器。
Abstract:
A printed circuit polymer thick film (PTF) resistor (410, 420) includes tolerance control material (425, 426, 440) that substantially surrounds the resistor body (423) and significantly improves the linearity of resistance vs. resistor length, and significantly reduces resistor-to-resistor and board-to-board fabrication variances. In one embodiment (420), the tolerance control material is the same metallic material as the printed circuit conductors (430), and is formed in two finger patterns on each side of the resistor body, each finger pattern connected to one terminal pad (435) of the resistor. A layout cell (700) is used for fabricating the PTF resistor. A method is used for fabricating the PTF resistor.
Abstract:
A cavity is formed in a support structure, the support structure being operable to support a semiconductor device, and at least a portion of a circuit element is disposed within the cavity in the support structure. The cavity in the support structure is filled with an electrically non- conductive filling material so as to at least partially surround the circuit element with the non- conductive filling material, and the semiconductor device is electrically connected to the circuit element. In an example embodiment, the circuit element is operable to substantially block direct current that is output by the semiconductor device or another semiconductor device.
Abstract:
A first and second capacitor plate are provided (101 and 102). Each capacitor plate has an opening disposed therethrough with the second capacitor plate being disposed substantially opposite the first capacitor plate. A first electrically conductive path interface is then disposed (103) in one of these openings as is at least a second electrically conductive path interface (104).
Abstract:
A method for forming embedded capacitors on a printed circuit board is disclosed. The capacitor is formed on the printed circuit board by a depositing a first dielectric layer over one or more electrodes situated on the PCB. Another electrode is formed on top of the first dielectric layer and a second dielectric layer is deposited on top of that electrode. A third electrode is formed on top of the second dielectric layer. The two dielectric layers are abrasively delineated in a single step by a method such as sand blasting to define portions of the first and second dielectric layers to create a multilayer capacitive structure.