Thermoelectric element

A thermoelectric element comprising:

• a first metal substrate;
• a first resin layer which is arranged on the first metal substrate, and comes into direct contact with the first metal substrate;
• a plurality of first electrodes arranged on the first resin layer;
• a plurality of P-type thermoelectric legs and a plurality of N-type thermoelectric legs which are arranged on the plurality of first electrodes;
• a plurality of second electrodes arranged on the plurality of P-type thermoelectric legs and the plurality of N-type thermoelectric legs;
• a second resin layer arranged on the plurality of second electrodes;
• and
• a second metal substrate which is arranged on the second resin layer, and comes into direct contact with the second resin layer,
• wherein the first resin layer and the plurality of first electrodes adhere to each other;
• and
• wherein the second resin layer and the plurality of second electrodes come into contact with each other, wherein:
• the second resin layer includes a plurality of grooves;
• and
• a top surface of each of the plurality of second electrodes which comes into contact with the second resin layer and parts of side surfaces of the plurality of second electrodes are accommodated in the plurality of grooves,
• wherein the plurality of second electrodes includes a first one of the second electrodes having the top surface that faces the second resin layer, a first side surface, a second side surface and a bottom surface that faces the first resin layer,
• wherein the bottom surface of the first one of the second electrodes is disposed in a first direction over one of the P-type thermoelectric legs and one of the N-type thermoelectric legs,
• wherein the plurality of grooves includes a first one of the grooves having a top groove surface and at least a wall groove surface that extends in the first direction away from the top groove surface,
• wherein the top surface of the first one of the second electrodes is to contact the top groove surface of the first one of the grooves, and
• wherein an entire area of the first side surface of the first one of the second electrodes is to be spaced apart from the wall groove surface of the first one of the grooves.