RENA Technologies has celebrated the 10th anniversary of its transformative Water-Capping Technology, protected under Patent EP 2 491 584 B1. Developed in a neck-and-neck race and finally cross-licensed with Gebr. Schmid GmbH to avoid IP entanglement for customers of both companies, the innovation has revolutionized single-side processing for solar cell manufacturing, driving efficiency and reliability across major markets in East-Asia, India, Europe and the United States.
The patented RENA Function Layer (RFL) introduces a groundbreaking method for protecting the upper side of a solar cell while the other-side is treated by chemistry. By applying a water or liquid layer to shield the upper surface, the process ensures superior integrity of the covered side without compromising the performance of the processed surface. The result – enhanced cell durability, improved yield rates and optimized manufacturing processes.
Since its launch, over 630 machines equipped with the technology have been deployed, demonstrating its reliability and industry trust. The technology is still mandatory for use in machines for PERC and the latest TOPCon processes, as in the RENA InEtchSide to this day.
Holger Kühnlein, RENA SVP Technology and Innovation, commented: “Our RFL water-capping technology exemplifies rigorous engineering and cross-disciplinary innovation. From concept to global deployment, we’ve ensured seamless integration into manufacturing lines, addressing the industry’s need for efficiency and precision.”
The widespread adoption of RFL technology underscores its adaptability and value in diverse production environments. RENA CEO Peter Schneidewind highlighted its significance, adding:
“This milestone reflects the profound impact of our patented technology in advancing solar cell manufacturing. With over 630 systems in operation, we remain committed to driving innovation and operational excellence for our global partners. RENA Technologies continues to lead the way in high-precision solar cell manufacturing, with the RFL patent standing as a testament to its dedication to advancing sustainable energy technologies.”
