Thermoelectric conversion module and method for producing thermoelectric conversion module

A method for producing a thermoelectric conversion module,

• wherein the thermoelectric conversion module includes
• a plurality of thermoelectric conversion elements,
• a first heat transfer plate having a first electrode portion disposed on one end side of the plurality of thermoelectric conversion elements, and
• a second heat transfer plate having a second electrode portion disposed on the other end side of the plurality of thermoelectric conversion elements,
• wherein the plurality of the thermoelectric conversion elements are electrically connected to each other via the first electrode portion and the second electrode portion, and
• the first heat transfer plate disposed on the one end side of the thermoelectric conversion elements is formed from a first insulating circuit board provided with a first insulating layer and the first electrode portion made of copper or a copper alloy formed on one surface of the first insulating layer,
• the method comprising:
• a Ag plating step of directly forming a Ag plating layer on a surface of the first electrode portion opposite to the first insulating layer without forming a Ni plating layer;
• a laminating step of laminating the thermoelectric conversion element on a surface of the Ag plating layer of the first insulating circuit board via a Ag bonding material containing Ag;
• and
• a thermoelectric conversion element bonding step of bonding the thermoelectric conversion element by pressurizing the thermoelectric conversion element and the first insulating circuit board in a lamination direction and heating the thermoelectric conversion element and the first insulating circuit board.