Method and device for pressure sintering connection

A method for pressure sintering connection of a joining group composed of a first and a second joining partner by means of a pressure sintering device with a lower tool and an upper tool which are formed to exert a pressure of more than 5 MPa on the joining group which is arranged between a supporting surface of the lower tool and a pressure surface of the upper tool;

• the lower tool with a heating apparatus and the upper tool, wherein, as a result of a movement of the upper tool towards the lower tool, the pressure of more than 5 MPa can be operably exerted on the joining group between the supporting surface of the lower tool and the pressure surface of the upper tool;
• wherein a holding apparatus is formed such that, as long as the supporting surface is adequately spaced apart from the pressure surface, the joining group can be arranged on the holding means of the holding device and in movement of the pressure surface towards the supporting surface, the holding apparatus arranges the joining group on the supporting surface;
• and
• wherein the holding device has a plurality of the pins which project out of the lower tool on the supporting surface, in the direction of the upper tool;
• and the plurality of pins are formed to be actively or passively movable relative to the upper tool;
• and wherein respective head ends of the pins that face the upper tool form the holding means;
• comprising the following method steps:
• A) providing the joining group at room temperature as an initial temperature;
• B) arranging the joining group between the supporting surface and the pressure surface, wherein the joining group has no direct thermal contact with the supporting surface and no direct thermal contact with the pressure surface;
• C) introducing a pressure onto the joining group by moving the lower tool and the upper tool towards one another, wherein at the start of the introduction of the pressure the starting temperature of the joining group and a sintering agent, which is arranged between the first and the second joining partner of the joining group, is no more than 100K above the initial temperature;
• D) increasing the temperature of the sintering agent, with a heating apparatus of the lower tool, by at least 50K above the starting temperature;
• and
• E) ending the introduction of pressure.