The back contact of the solar module consists of a molybdenum coating applied to the substrate glass using cathode sputtering.

The molybdenum coating is divided into 150 cells.

A layer of copper, indium, gallium and selenium is applied as a light absorber using a co-evaporation technique. A buffer layer is then deposited via a chemical bath.

Further structuring is needed to interconnect the 150 cells.

A conductive overlay of zinc oxide is applied as a front contact using cathode sputtering.

A third structuring process is needed to interconnect the 150 cells. 

In order to maintain Solibro’s high reliability standards while continuously increasing the module power, the active area of the module is divided into different segments by an additional scribing operation. 

The coated substrate glass now takes on its final form. It is subjected to a downstream two-stage edge ablation process.

Contact holes are drilled so that the contact strip can subsequently be routed to the back.

Two contact strips are installed and the edges are sealed with butyl tape.

The front glass, substrate glass and EVA film are "married" to each other.

All components are laminated together and then cooled for the subsequent process steps.

The contact holes are sealed and then the junction box is mounted.

The electrical insulation of the finished modules is tested using a high voltage tester.  The solar simulator determines the output of the modules.

A part of the produced laminates is framed by one of our fully automated production tools and quality tested by a high voltage inspection afterwards.

After labeling and a final inspection the Solibro modules are ready for packaging and to be sent to our customers.