It's because the facilities that make them take years and the cost is absolutely absurd up front. So you can spend two of the years making a factory to make this stuff and then if a boom ends you're left holding the bag.
Also, being as AI companies are not spending their own money. It's just capital money. They're spending other people's money. The memory companies know they can take a $10 chip and sell it to them for hundreds of dollars and easily get paid for it.
The last I read pretty much the next two years were of wafers that you're going to use to make memory is already pre-booked by AI companies.
If you're talking about building a semiconductor factory that manufactures computer memory (RAM or NAND flash storage), you're looking at approximately 3–5 years from start to finish for a new, large-scale manufacturing facility.
And that's assuming the company has the money, equipment, permits, and technology lined up.
Here's how the process breaks down.
| Stage | Estimated time |
| ---------------------------------------------- | -------------- |
| Land, permits and engineering | 6–18 months |
| Factory and cleanroom construction | 18–30 months |
| Installing specialized manufacturing equipment | 9–18 months |
| Testing and initial production | 3–6 months |
| Scaling up to full production | 6–18 months |
Some stages overlap, so these aren't simply added together. csis.org +2
### A real-world example
Micron is building a major DRAM memory manufacturing facility in New York. Its first factory is expected to begin producing wafers around 2030, following its 2026 groundbreaking. investors.micron.com +1
### Why can't they build them faster?
* They require extremely specialized equipment.
* The buildings need exceptionally clean environments.
* Manufacturing requires enormous amounts of electricity and ultra-pure water.
* Producing memory chips consistently with acceptable yields takes considerable testing.
* There are only a handful of companies with the expertise to manufacture advanced memory.
### My bottom line
If the goal is to address today's shortage of RAM and computer memory, building a factory today isn't going to solve the problem next year.
Realistically, it could take 3–5 years before a new factory makes a meaningful contribution to memory supply.
One question: Are you thinking about building more factories in the United States to address the current RAM shortage, or wondering why existing manufacturers can't simply expand production faster?