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Tesla Terafab is difficult, but probably not rocket science, says Elon Musk

There are very few people in the world today who can say this with authority. Elon Musk is one of them.

Mar 23, 2026

Tesla Terafab is difficult, but probably not rocket science, says Elon Musk

EVwire Brief: The Terafab Project will push the limits of semiconductor manufacturing, but Elon Musk has outlined how Tesla, SpaceX, and xAI plan to achieve the initiative’s extremely ambitious targets.

The discussion began after industry observers pointed out that the Terafab combines mask production, fabrication, testing, and packaging into a single system.

These processes are typically separated across different facilities, and integrating them under one roof is considered highly complex.

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One engineer on X described the concept as “unicorn territory,” noting that simply achieving this level of integration would already be a major step beyond current semiconductor practices.

Still, advanced chip manufacturing is one of the most complex engineering fields, with the engineer noting that the Terafab could very well be more complicated than actual rocket science.

Musk acknowledged the Terafab’s challenge in a reply, but suggested that other projects undertaken by his companies may be even more difficult.

“Given that several companies make advanced chips, but no companies have ever made fully reusable rockets or achieved SpaceX scale, I think Starship is harder, but we shall see.”

He then outlined how Tesla plans to approach the problem differently from traditional fabs. Instead of handling multiple chip designs and complex branching workflows, Terafab will focus on a simplified structure with each fab dedicated to a single design, allowing for more direct and efficient process flow.

The Terafab will support Tesla, SpaceX, and xAI at the same time Source

“Terafab will technically be two fabs, each making only one chip design. This greatly simplifies process flow and allows more linear, adjacent movement of the FOUP,” Musk wrote. 

Tesla also intends to use production scale itself as a tool for improvement. By running at very high output, the company expects to quickly identify bottlenecks, remove unnecessary steps, and redesign limiting equipment where possible.

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“A super high production rate allows us to test very quickly what steps can be deleted, simplified or sped up, even after the design is fixed… Anything that is a rate limiter at the machine level means that machine will be redesigned, unless already at limit of physics.”

Elon Musk

Elon Musk’s comments about the strategies to achieve the Terafab’s targets are classic Tesla. Focusing on simplicity is a typical trademark of Tesla, as shown in its development and use of Gigacasts and a software-heavy driver interface. 

Among all of Elon Musk’s companies, Tesla is also the most experienced when it comes to scale, with the company having produced the world’s best-selling vehicle by volume, the Model Y, for the past three years using only four factories across the United States, Germany, and China.

Check out our other coverage of the Tesla Terafab Project:

  1. A quick explainer on the Terafactory is and why it’s being made

  2. A look at the Terafactory’s incredible size, according to Elon Musk

Source: Elon Musk on X

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