Electric field grading protection design surrounding a galvanic or capacitive isolator

A micro-isolator with enhanced isolation breakdown voltage, comprising:

• a first isolator element in a first plane, wherein the first isolator element comprises a first coil or a first plate;
• a second isolator element in a second plane, wherein the second isolator element comprises a second coil or a second plate;
• a first dielectric material, comprising a polymer, disposed between the first and second isolator elements;
• a first electrically floating ring disposed in the first plane and surrounding the first isolator element;
• a second electrically floating ring concentric with the first electrically floating ring;
• and
• a third electrically floating ring concentric with the second electrically floating ring, wherein a first gap distance between the third electrically floating ring and the second electrically floating ring differs from a second gap distance between the second electrically floating ring and the first electrically floating ring.

A micro-isolator with enhanced isolation breakdown voltage, comprising:

• first and second isolator elements disposed in respective planes, wherein the first isolator element comprises a first coil or a first plate and the second isolator element comprises a second coil or a second plate;
• a first dielectric material, comprising a polymer, disposed between the first and second isolator elements;
• an electrically floating ring in-plane with and surrounding the first isolator element;
• and
• a second dielectric material separating the first isolator element from the electrically floating ring,
• wherein the second dielectric material encapsulates the first isolator element but not the electrically floating ring.

A micro-isolator with enhanced isolation breakdown voltage, comprising:

• a first isolator element in a first plane, comprising a first coil or a first plate;
• a second isolator element in a second plane, comprising a second coil or a second plate;
• a polymeric dielectric material disposed between the first and second isolator elements;
• and
• first, second and third concentric electrically floating rings surrounding the first isolator element in the first plane;
• wherein a first gap distance between the third electrically floating ring and the second electrically floating ring differs from a second gap distance between the second electrically floating ring and the first electrically floating ring.