Patent ID: 8481842
Filing Date: 2013-07-09
Classification: H01L

Abstract:
1. A process for producing Peltier modules with several Peltier elements located between at least two substrates, the at least two substrates being ceramic substrates and at least on their sides being provided with contact surfaces which are formed by metallic regions of copper and to which the Peltier elements are bonded with Peltier element terminal sides in production, wherein at least one part of the Peltier elements at least on one terminal side is connected to the contact surface by sinter bonding, and wherein production of the at least one part of the Peltier elements and sinter bonding take place in a sintering process using a mask with a plurality of openings, the process further comprising the steps of: providing metallic regions formed by a copper foil in the at least two substrates by direct copper bonding or active soldering using a brazing solder element selected from the group consisting of Hf, Ti, Zr, Nb and Ce; placing the mask on one of the at least two substrates, such that the openings of the mask each are located over a contact surface of the substrate; using a powder mixture of thermo electric material for production of the Peltier elements; filling the openings of the mask with the powder mixture; and forming and bonding the Peltier elements to the contact surfaces in the sintering process by exposing the powder mixture in each opening of the mask to a sintering pressure greater than 10 bars and a sintering temperature, wherein sintering or sinter bonding takes place using a spark plasma sintering process.