GENERIS PECVD

The newly developed GENERIS PECVD system is a modular horizontal inline tool designed for the special needs in mass production of solar cells with highest efficiencies, such as passivated emitter and rear cells (PERC/PERT) and cells with passivated contacts (e.g. TOPCon, POLO). PERC solar cells are coated on both sides with dielectric passivation layers. Rear side passivation is achieved by deposition of a thin aluminum oxide (AlO_x) layer capped by hydrogen rich silicon nitride. On the front side, a layer of hydrogen rich silicon nitride (SiN_x:H) serves as both, passivation and anti-reflective coating (ARC). The GENERIS PECVD system is ideally suited for cost effective mass production with high throughput, high uptime, short cleaning interruptions and maximum utilization of raw materials. The substrate temperature is fully controlled during the whole process, which enables optimum layer performance at temperatures in the order of 350 °C for PERC cells. The thermal properties can be adapted in a wide range for other layer stacks and applications. Specially designed carriers of the GENERIS PECVD allow single side deposition with close to zero wrap-around.