Power module assembly with dual substrates and reduced inductance

A power module assembly comprising:

• a first substrate including a first layer, second layer and a third layer, the first layer and the third layer being electrically conductive;
• wherein the first layer is configured to carry a switch current flowing in a first direction;
• wherein the second layer is an electrically insulating layer positioned between and configured to electrically isolate the first and the third layers;
• a second substrate operatively connected to the first substrate and including a fourth layer, fifth layer and a sixth layer, the fourth layer and the sixth layer being electrically conductive;
• wherein the fifth layer is an electrically insulating layer positioned between and configured to electrically isolate the fourth and the sixth layers;
• a conductive joining layer connecting the third layer of the first substrate and the fourth layer of the second substrate;
• a first semi-conductor stack operatively connected to the first layer at a first junction and a second semi-conductor stack operatively connected to the first layer at a third junction, such that the switch current flows from the first semi-conductor stack to the second semi-conductor stack;
• an adjacent set of terminals, including a first terminal operatively connected to the first substrate and a second terminal operatively connected to the second substrate, the first terminal being adjacent to the second terminal;
• a first flexible structure, a second flexible structure and an output node operatively connected to the first layer;
• wherein the first flexible structure is positioned between the first semi-conductor stack and the adjacent set of terminals, and the second flexible structure is positioned between the second semi-conductor stack and the output node;
• and
• wherein the third layer of the first substrate, the conductive joining layer and the fourth layer of the second substrate are configured to function together as a unitary conducting layer carrying the switch current in a second direction, the second direction being opposite to the first direction.