Assembly for a power module, power module and method for producing an assembly for a power module

An assembly comprising:

• an electrically isolating base body;
• a first electrically conductive structure embedded in the base body, the first electrically conductive structure configured to be coupled to a first electrical potential;
• and
• a second electrically conductive structure embedded in the base body, the second electrically conductive structure configured to be coupled to a second electrical potential that is different than the first electrical potential;
• wherein the first and the second electrically conductive structures each comprise a first region that is not covered by the base body;
• wherein the first region of the first electrically conductive structure is arranged in a hole of the base body and is retracted with respect to an opening of the hole, the hole having an electrically isolating material located therein, the electrically isolating material covering the first region of the first electrically conductive structure;
• wherein the assembly is configured for a power module in which, during normal operation, a voltage difference between the first and the second electrical potential is at least 1000 V;
• and
• wherein the assembly is designed such that, without at least one first region of the first and the second electrically conductive structures being covered by the electrically isolating material, the power module would not fulfill the requirements of creepage and clearance distances according to IEC 60664-1:2020 and/or EN 501 50124-1:2017.

A power module comprising:

• a carrier;
• a power electronic component mounted to the carrier;
• an electrically isolating base body overlying the power electronic component;
• a first electrically conductive structure embedded in the base body and electrically coupled to the power electronic component, the first electrically conductive structure configured to be coupled to a first electrical potential, wherein the first electrically conductive structure includes a first terminal region to be coupled to the first electrical potential and first and second additional regions that are laterally spaced from the first terminal region and are not covered by the base body, the first and second additional regions being respectively located within first and second holes in the base body and covered by an electrically isolating material;
• and
• a second electrically conductive structure embedded in the base body and electrically coupled to the power electronic component, the second electrically conductive structure configured to be coupled to a second electrical potential that is different than the first electrical potential by at least 1000 volts during normal operation, wherein the second electrically conductive structure includes a second terminal region to be coupled to the second electrical potential and third and fourth additional regions that are laterally spaced from the second terminal region and are not covered by the base body, the third and fourth additional regions being respectively located within third and fourth holes in the base body and covered by an electrically isolating material.