Lateral coils used for energy transfer over isolation region in multivoltage devices

A multi-voltage domain device, comprising:

• a semiconductor layer comprising a first main surface and a second main surface arranged opposite to the first main surface, wherein the semiconductor layer comprises:
• a first region comprising first circuitry,
• a second region comprising second circuitry and third circuitry, and
• an isolation region that electrically isolates the first region and the second region in a lateral direction in order to electrically isolate the first circuitry and the second circuitry, wherein the lateral direction extends parallel to the first main surface and the second main surface;
• an insulator layer arranged on the first main surface of the semiconductor layer;
• a first coil arranged in the insulator layer, wherein the first coil is electrically coupled to the first circuitry and is isolated from the second region, wherein the first coil has a first center axis around which first windings of the first coil are wound, wherein the first windings define a first core area of the first coil that extends along the first center axis, and wherein the first center axis extends parallel to the lateral direction;
• a second coil arranged in the insulator layer and laterally separated from the first coil in the lateral direction by an insulator material of the insulator layer, wherein the second coil is electrically coupled to the second circuitry and is isolated from the first region, wherein the second coil has a second center axis around which second windings of the second coil are wound, wherein the second windings define a second core area of the second coil that extends along the second center axis, and wherein the second center axis extends parallel to the lateral direction;
• and
• a third coil arranged in the insulator layer and laterally separated from the first coil in the lateral direction by the insulator material of the insulator layer, wherein the third coil is electrically coupled to the third circuitry and is isolated from the first region, wherein the third coil has a third center axis around which third windings of the third coil are wound, wherein the third windings define a third core area of the third coil that extends along the third center axis, and wherein the third center axis extends parallel to the lateral direction,
• wherein the first core area is at least partially aligned with the second core area in the lateral direction,
• wherein the first coil and the second coil are magnetically coupled to each other in the lateral direction based on an alignment of the first core area with the second core area,
• wherein the third core area is at least partially aligned with the first core area in the lateral direction, and
• wherein the first coil and the third coil are magnetically coupled to each other in the lateral direction based on an alignment of the first core area with the third core area.

A multi-voltage domain device, comprising:

• a circuit substrate comprising a first main surface and a second main surface arranged opposite to the first main surface, wherein the circuit substrate comprises:
• a first region comprising first circuitry,
• a second region comprising second circuitry,
• a third region comprising third circuitry, and
• at least one isolation region that electrically isolates the first region and the second region in a first lateral direction in order to electrically isolate the first circuitry and the second circuitry, electrically isolates the first region and the third region in the first lateral direction in order to electrically isolate the first circuitry and the third circuitry, and electrically isolates the second region and the third region in a second lateral direction in order to electrically isolate the second circuitry and the third circuitry;
• an insulator layer arranged on the first main surface of the circuit substrate;
• a first coil arranged in the insulator layer, wherein the first coil is electrically coupled to the first circuitry and is isolated from the second region and the third region, wherein the first coil has a first center axis around which first windings of the first coil are wound, wherein the first windings define a first core area of the first coil that extends along the first center axis, and wherein the first center axis extends parallel to the first lateral direction;
• a second coil arranged in the insulator layer and laterally separated from the first coil in the first lateral direction by an insulator material of the insulator layer, wherein the second coil is electrically coupled to the second circuitry and is isolated from the first region and the third region, wherein the second coil has a second center axis around which second windings of the second coil are wound, wherein the second windings define a second core area of the second coil that extends along the second center axis, and wherein the second center axis extends parallel to the first lateral direction;
• and
• a third coil arranged in the insulator layer, laterally separated from the first coil in the first lateral direction by the insulator material of the insulator layer and laterally separated from the second coil in the second lateral direction by the insulator material of the insulator layer, wherein the third coil is electrically coupled to the third circuitry and is isolated from the first region and the second region, wherein the third coil has a third center axis around which third windings of the third coil are wound, wherein the third windings define a third core area of the third coil that extends along the third center axis, and wherein the third center axis extends parallel to the first lateral direction,
• wherein the second core area is at least partially aligned with the first core area in the first lateral direction,
• wherein the third core area is at least partially aligned with the first core area in the first lateral direction,
• wherein the first coil and the second coil are magnetically coupled to each other in the first lateral direction based on an alignment of the first core area with the second core area, and
• wherein the first coil and the third coil are magnetically coupled to each other in the first lateral direction based on an alignment of the first core area with the third core area.