Heraeus fails to win IP case on tellurium containing glass frit with Giga Solar

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Jolywood, a leading manufacturer of advanced solar cell technologies, signed a strategic R&D cooperation agreement to develop next generation metallization solutions for n-type mono bifacial solar cells with Heraeus at SNEC 2017.

Major metallization paste producer Heraeus Photovoltaics said it had lost a patent case against Taiwan-based Giga Solar Materials Co in the Taiwanese Intellectual Property Court but noted it was reviewing the findings before deciding on an appeal. 

In 2015, Heraeus sued rival paste manufacturer Giga Solar for patent infringements of its tellurium contained glass frit used in its advanced PV metallization pastes for solar cell production. 

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Andreas Liebheit, the President of Heraeus Photovoltaics stated, “We are surprised and disappointed by the court’s ruling because in the course of two years of litigation we saw our strong patent decision confirmed several times. While we consider our options to appeal, it is important to note that rulings like these send a chilling message to companies throughout our industry who invest significant capital on R&D efforts. Without appropriate protection for legitimate patents and intellectual property, the collective result is less incentive to make necessary investments across the PV industry.”

In recent years, Heraeus Photovoltaics has secured a number of major new customer wins, notably in China and had launched its first new product outside the traditional solar cell paste market. 

“As a company, we remain undeterred. To deliver the top quality and efficiency gains our customers need, we will continue to invest, we will continue to rapidly innovate, and we will rigorously protect and defend our intellectual property,” added Liebheit.

7 October 2025
San Francisco Bay Area, USA
PV Tech has been running an annual PV CellTech Conference since 2016. PV CellTech USA, on 7-8 October 2025 is our third PV CellTech conference dedicated to the U.S. manufacturing sector. The events in 2023 and 2024 were a sell out success and 2025 will once again gather the key stakeholders from PV manufacturing, equipment/materials, policy-making and strategy, capital equipment investment and all interested downstream channels and third-party entities. The goal is simple: to map out PV manufacturing in the U.S. out to 2030 and beyond.

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