Abstract:
A multilayer printed circuit board ("PCB") coil that simulates a coil formed from litz wire. The PCB includes a plurality of alternating conductor and insulating layers interconnected to cooperatively form the coil. Each conductor layer includes a trace that follows the desired coil shape and is divided into a plurality of discrete conductor segments. The segments are electrically connected across layers to provide a plurality of current flow paths (or filaments) that undulate between the layers in a regular, repeating pattern. The coil may be configured so that each filament spends a substantially equal amount of time in proximity to the paired coil and therefore contributes substantially equally to the self or mutual inductance of the coil. Each conductor layer may include a plurality of associated traces and intralayer connector that interconnected so that each filament undulates not only upwardly/downwardly, but also inwardly/outwardly in a regular, repeating pattern.
Abstract:
A method for forming closed vies In a mgtfflayßr printed circuit board. A dielectric layer Is laminated to one side of a central. core having a metal layer on each side. A second dielectric layer is laminated to the other side of the central core. Closed vtas In the central core have been formed by drilling partially through but not completely penetrating the central core, and then completing the via from the opposite side with a hole that Is much smaller In diameter to form a pathway that penetrates completely through the central core from one side to another. The via is then plated with metal to substantially close the smaller hols. Approximately one half of the closed vlas are situated such that the closed aperture faces one dielectric layer and a remainder of the dosed vias are situated such that the closed aperture faces the other dielectric layer.
Abstract:
A highly compact inductor formed on opposite faces of a dielectric substrate. Sets of parallel spaced conductive traces formed on the opposite faces of the substrate are interconnected by metallized vias through the substrate, in such a way as to form a continuous spiral conductive path. The inductor is preferably formed as two closely adjacent segments, each with conductive traces on each face of the substrate and each having metallized vias interconnecting the conductive traces. The segments are electrically connected in series and produce a magnetic field that extends through each segment in opposite directions and is closely coupled from one segment to the other. The inductor is, therefore, electromagnetically similar to a wire-wound toroidal inductor, providing high inductance and contourable Q values, but is highly compact, especially in the z-axis direction normal to the substrate.
Abstract:
Miniature circuitry and inductor components in which multiple levels of printed circuitry are formed on each side of a support panel, typically a printed circuit board or rigid flex. Electrical connection between the plural levels of circuitry and multiple windings around magnetic members are provided by plural plated through hole conductors. Small through hole openings accommodate a plurality of the plated through hole conductors since each is insulated from the others by a very thin layer of vacuum deposited organic layer such as parylene having a high dielectric strength. Adhesion of this plated copper to the organic layer is provided by first applying an adhesive promotor to the surface of the organic layer followed by the vacuum deposition of the organic layer.
Abstract:
Provided are connection structures for a microelectronic device and methods for forming the structure. A substrate (10) is included having opposing surfaces and a plurality of holes (12A-D) extending through the surfaces. Also included is a plurality of electrically conductive posts (18A-D). Each post extends from a base to a tip located within a corresponding hole of the substrate. An additional substrate (20) may be provided such that the base of each post is located on a surface thereof. Additional electrically conductive posts (28A-D) may be provided having tips in corresponding holes (22A-D) of the additional substrate. Optionally, a dielectric material may be placed between the substrate and the posts.
Abstract:
Layered structure for a head worn device, wherein electric signals are fed along metallic leads, which are adhered to a layer on or within the layered structure and where a first and a second lead for connecting a first and a second terminal of a component are provided and whereby the two leads are passed side by side and alternating on the two sides of the layer, and in such a manner that the first and second lead will cross one another at an angle but passing on each their side of the print layer.
Abstract:
A non-uniform transmission line includes at least one patterned conductive layer, a dielectric layer adjacent to the patterned conductive layer(s), and an insulating layer surrounding the patterned conductive layer(s) and the dielectric layer.
Abstract:
An electromagnetic (EM) coupler including a first transmission structure having a first geometry, and a second transmission structure having a second geometry and forming an EM coupler with the first transmission structure, the first and second geometries being selected to reduce sensitivity of EM coupling to relative positions of the first and second transmission structures is disclosed.
Abstract:
An improved magnetic structure suitable for electronic applications is disclosed. The magnetic structure (304, 306) may be formed on or within a substrate (302) such as a printed circuit board by forming a layer of magnetic material, pattering the layer of magnetic material, and etching the layer to form the magnetic structure. Various insulating layers (310-316) and/or conductive layers (318-368) may then be formed over the magnetic structures as part of the substrate. Inductors suitable for use in power supplies may be formed using the magnetic structures of the present invention.