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June 10, 2025

RENA Technologies GmbH informs about infringement of the water cap patent in the USA and India

RENA Technologies GmbH, a leading global provider of innovative solutions and equipment for wet chemical surface treatment, informs about a widespread patent infringement: RENA has received evidence from the USA and India that the existing water cap patent in the USA (US8685864B2), China (CN102754198B) and India (3496CHENP2012) for the protection of the top surface during the single-side etching of solar wafers is being infringed indirectly or directly mainly by Chinese suppliers. These suppliers advertise, build and distribute devices to enable solar cell manufacturers to use the mandatory single-side etching process in PERC and TOPCON solar cell production by means of a water cap without having the required license. As a result, RENA will take legal action to stop these patent infringements and protect the integrity of its products.

RENA Technologies licensed this patent from SCHMID as part of a cross-licensing agreement and both companies are entitled to use this patent worldwide. Due to the widespread patent infringement, RENA intends to take legal action against this demonstrable patent infringement soon, particularly in the US and Indian markets.

"We take the protection of our intellectual property very seriously. The unauthorized use of patented technology jeopardizes our innovative strength and competitiveness in an anti-competitive manner," explains Peter Schneidewind, CEO of RENA Technologies GmbH.

As this is also a process patent, legal action may also be taken against solar cell manufacturers who have purchased systems from manufacturers who do not hold a license for this patent.
Furthermore, solar cells manufactured in violation of the patent have a high risk of seizure worldwide. This means that companies using or reselling such products run considerable legal and financial risks. To avoid these risks, companies should opt for the proven and legal solutions from RENA, which guarantee maximum process reliability, quality and efficiency.

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