DIELECTRIC STACK, AN ISOLATOR DEVICE AND METHOD OF FORMING AN ISOLATOR DEVICE

摘要

An isolator device is provided comprising a body of first dielectric material between the first and second conductors, such as primary and secondary coils of a micro-transformer. A region of second dielectric material is provided between the body of first dielectric material and at least one of the first and second electrodes, wherein the second dielectric material has a higher relative permittivity than the first dielectric material. This provides enhances ability to withstand the Electric fields generated at the edge of a conductor. The body of the first dielectric can be tapered to provide stress relief to prevent the second dielectric material developing stress cracks.

主权项

1. A dielectric structure, comprising: a first layer of a first type of dielectric formed adjacent a substrate, and a second layer of the first dielectric formed on the first layer, wherein the second layer is delimited by a periphery and at least some parts of the second layer do not extend to or beyond a periphery of the first layer, and further including a layer of a second dielectric formed over an uppermost one of the layers of the first dielectric, wherein the layer of the second dielectric has a higher permittivity than the first dielectric.