Electroninks Introduces Air-Curable Copper Conductive Ink for Additive Metallization

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Electroninks, a company specializing in metal complex inks for additive manufacturing and semiconductor packaging, announced an advancement to its copper metal-organic decomposition (MOD) ink platform: a copper metallization technology capable of curing under ambient conditions, open to air.

Building on the company’s September 2024 commercial launch of Cu-MOD, which demonstrated low resistivity and adhesion across a range of substrates, this development addresses a request from the market since that release: the ability to cure copper without an inert atmosphere, particularly in large-area metallization applications.

Electroninks is currently working with a select group of partners to develop the technology into real-world use cases, with additional results and performance data expected in Q3 2026.

Copper Metallization

Copper is one of the most widely used materials in electronics manufacturing, valued for its conductivity, availability, and cost advantages over precious metals. However, copper oxidizes readily, requiring inert atmosphere curing environments, typically nitrogen or forming gas, to produce conductive films.

Electroninks’ new Cu-MOD technology removes that requirement. The ink cures under ambient, open-air conditions using low-temperature thermal processing at approximately 150°C for 5 to 10 minutes, producing a copper film without the need for inert gas infrastructure, vacuum equipment, heat press or lamination systems, or other specialty tooling.

The company said the process provides a copper metallization workflow compatible with standard processing environments.

Preliminary results, focused on polyimide, glass, EMC, and build-up film substrates, indicate resistivity performance comparable with existing copper metallization approaches. Full performance data is expected to be shared in Q3 2026.

Market Applications

Electroninks said the implications of ambient-condition copper curing extend beyond applications where copper metallization is already established.

“While silver and gold will remain key materials in many applications, for large area and full-film metallization, the rising cost of precious metals has renewed interest across the electronics industry in cost-effective alternatives that do not compromise electrical performance. Electroninks’ ambient-curable Cu-MOD is designed to address that need directly, offering a lower-cost conductive solution that can be processed without the environmental controls traditionally required for copper,” said Kazutaka Ozawa, Technical Director at Electroninks.

Partner Program

Electroninks is currently limiting early access to a select group of development partners. The company said full performance data, application results, and broader availability details will be announced in Q3 2026.

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