Wuxi DK Electronic Materials is pursuing two patent infringement cases against domestic competitors, seeking injunctions, destruction of equipment and combined damages of CNY400 million ($57.5 million).
Wuxi DK Electronic Materials has filed two patent infringement lawsuits in the Jiangsu High People’s Court against Jiangsu Riyu Photovoltaic New Materials and Suzhou Jinyin New Materials Technology, seeking CNY200 million in damages and related legal fees in both cases.
The company said both files have been formally accepted and registered by the court, although no hearing dates have yet been scheduled.
The lawsuits concern two Chinese invention patents, ZL201180032359.1 and ZL201180032701.8, which cover thick-film conductive paste formulations for semiconductor devices, including solar cells. DKEM said the patents are held by its subsidiary Solamet Electronic Materials and cover lead-tellurium-lithium and oxide-based paste technologies.
DKEM is seeking injunctions to stop the production, sale and offering for sale of the allegedly infringing pastes. The company also demands the destruction of specific production equipment and molds, and compensation for economic losses, enforcement costs and related costs.
The patents trace back to the intellectual property portfolio of DuPont’s former Solamet photovoltaic paste business, which was acquired by another entity in 2021 for $190 million. DKEM later consolidated control over the Solamet assets and associated intellectual property.
Suzhou Jinyin is described in Chinese financial reporting as a leading supplier of front-side silver paste for solar cells, and ranks third globally in terms of market share. Founded in 2011, it was later acquired by listed electronics company Suzhou Good-Ark Electronics. Jiangsu Riyu is a fast-growing pasta supplier that has applied for a Hong Kong stock exchange listing in 2025, with plans to expand into n-type and back-contact pasta products.
This follows DKEM’s previous high-profile patent actions. In 2025, its subsidiary filed a lawsuit against Zhejiang Guangda Electronic Technology, seeking similar solutions. A Solamet-affiliated entity also filed related claims against Changzhou Juhe New Materials in 2021, with domestic and foreign disputes reportedly settled in August 2022.
In addition, DKEM signaled earnings pressure and forecast a net loss of CNY200 million to CNY300 million for 2025, mainly linked to non-operational factors, Chinese financial media said.
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