Key Takeaways
1. Space Forge successfully produced plasma in Low Earth Orbit (LEO) using its ForgeStar-1 satellite, achieving temperatures up to 1000 °C (1832 °F).
2. The satellite, launched in June 2025, demonstrated capabilities for gas-phase crystal growth essential for advanced semiconductor materials.
3. Materials produced in microgravity could enhance energy efficiency by up to 60% for various technologies, though claims await independent verification.
4. ForgeStar-1 will deorbit in 2026 after completing further experiments, providing data for the design of its next satellite, ForgeStar-2.
5. This plasma test serves as a proof of concept for future in-orbit manufacturing, potentially improving semiconductor production on Earth.
UK-based in-orbit manufacturing start-up Space Forge has announced the successful production of plasma in Low Earth Orbit (LEO) using its ForgeStar-1 satellite. The miniature manufacturing furnace on the satellite achieved microwave-induced plasma at temperatures reaching as high as 1000 °C (1832 °F).
Launch Details
The satellite was launched in June 2025 as part of SpaceX’s Transporter-14 rideshare mission, with the plasma generation test carried out in December 2025. ForgeStar-1, which is about the size of a microwave oven, was operated remotely from Space Forge’s control center located in Cardiff, Wales.
Confirmation of Capabilities
This successful experiment indicates that the satellite can produce and maintain the extreme heat conditions necessary for gas-phase crystal growth. This process is essential for creating advanced semiconductor materials including gallium nitride (GaN), silicon carbide (SiC), and possibly diamond-like substrates.
According to a press release, Space Forge’s CEO and co-founder Joshua Western stated that generating plasma in space shows that the required conditions for advanced crystal growth can be achieved on a dedicated commercial satellite.
Potential Benefits
The company asserts that materials produced in microgravity could lead to up to 60% greater energy efficiency, particularly beneficial for devices like power electronics, AI accelerators, electric vehicles, and future mobile and networking technologies. However, these performance claims have yet to be confirmed by independent sources.
ForgeStar-1 is not intended to return to Earth and is set to deorbit in a controlled manner in 2026 after finishing more experiments on plasma behavior and re-entry systems. The data gathered from this mission will help inform the design of ForgeStar-2, a subsequent satellite that Space Forge plans to equip with its Pridwen heat shield, allowing for the return of manufactured materials.
Future Prospects
Though large-scale production in space is still a number of years away, this plasma test acts as a practical proof of concept. In the future, such systems could enhance Earth-based semiconductor manufacturing by providing high-quality seed crystals or specialized materials that are challenging to produce under Earth’s gravity.
NotebookCheck previously covered Space Forge’s funding round in May 2025, which showcased the company’s goals in advanced materials manufacturing in microgravity. The company secured £22.6 million (about $30 million) in Series A funding to support ForgeStar-1 and the development of its upcoming satellite, ForgeStar-2.
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