Thermoelectric conversion module and method for producing thermoelectric conversion module

A thermoelectric conversion module comprising:

• a plurality of thermoelectric conversion elements;
• a first electrode portion disposed on a first end side of the thermoelectric conversion elements;
• and
• a second electrode portion disposed on a second end side of the thermoelectric conversion elements,
• wherein the plurality of thermoelectric conversion elements are directly connected to each other by the first electrode portion and/or the second electrode portion,
• a second insulating circuit board provided with a second insulating layer of which at least one surface is made of alumina and the second electrode portion formed of a sintered body of Ag formed on the one surface of the second insulating layer is disposed on the second end side of the thermoelectric conversion elements,
• adjacent thermoelectric conversion elements in the plurality of thermoelectric conversion elements are directly connected by the second electrode portion,
• the second electrode portion includes a glass-containing region and a glass-free region in this order from a second insulating layer side in a lamination direction,
• the glass-containing region is a region dispersing glass particles inside the sintered body of Ag,
• a glass component is present at an interface between the second electrode portion and the second insulating layer, and
• the second electrode portion has a thickness of 30 μm or more and a porosity of less than 10% at least in a region where the thermoelectric conversion element is disposed.