ESPRYX™ production process

Key features:

  • Based on well-established industrial production machinery
  • Automated & scalable in output and size 
  • Quality control of critical parameters at any point of the process (e.g. electrical resistivity)
  • Design flexibility for the resulting modules
  • Potential compatibility with several TE materials
  • Smart module design enabling both Peltier & TEG module production 
  • Strong IP
  • Successful pilot series production distributed to test costumers

Detailed step description:

  • Thermoelectric generators are based on special semiconductor materials. Two paired material types, so called n-type and p-type, are delivered. First, the two material ingots are pulverized. The powder is then filled into tablet shapes.
  • In a tableting process the powder is cold pressed into so called TE legs. 
  • In a fully automated pick-and-place process step the n-type and p-legs are positioned by a robot in a prepared matrix filling the drilled holes.
  • The filled matrix is placed in a sinter oven for thermal treatment of the semiconductor legs to achieve the high TE module performance.
  • In the metallization step metal layers are deposited onto the legs to establish electrical contact points.
  • Robust electrodes are placed on top of the prepared matrix in a fully automated pick-and-place process ready to be joined to form the module.
  • The loosely placed electrodes are now bonded onto the matrix in an oven employing a thermal process.
  • The final production step consists of the spray deposition of the black top coating providing electrical insulation for the electrodes at the interface and corrosion protection.
  • For the module implementation wires are connected to the two module contacts.