Tower Semiconductor's $3B Expansion in Japan, Raises 2028 Revenue Target
Alina Collins
Israeli foundry Tower Semiconductor plans to invest roughly $3 billion in Japan to build out silicon-photonics and silicon-germanium capacity, with about $1 billion in Japanese government subsidies; shares jumped more than 18% pre-market and the company raised its 2028 revenue target to $3.6 billion.
What is the $3 billion building?
Tower is expanding two technology lines in Japan: silicon photonics — moving data between chips with light instead of electricity, for higher speed and lower power — and silicon-germanium, a material process that makes faster, more efficient semiconductor devices.
This means → both lines aim squarely at the biggest spender right now: AI and data-center infrastructure. This is a targeted bet, not a broad capacity addition.
Roughly $1 billion comes from Japanese government subsidies — one-third of the total. In plain terms = Tokyo is putting real money on the table to land advanced chip capacity on Japanese soil.
What is the timeline?
Phase one: convert Tower's existing Arai plant (formerly Fab 6) into a 300 mm silicon-photonics line, targeting full production by Q4 2027.
Phase two: launch in parallel, building a new 300 mm fab next to the existing Fab 7 to support growth beyond 2028.
This means → Tower is not waiting to see how phase one performs before committing to phase two. Running both in parallel signals high conviction in silicon-photonics demand.
How much did the 2028 targets move?
Revenue target raised from $2.8 billion to $3.6 billion, up roughly 29%. Net profit raised from $750 million to $1.2 billion, up 60%.
Profit growth far outpaces revenue growth. This reflects an expectation that silicon-photonics production will meaningfully lift margins — not just more volume, but better economics per wafer.
In plain terms = whether this target holds comes down to one checkpoint: can Fab 6 hit full production by late 2027? That is the first domino for everything that follows.
Why did the stock jump 18% before the open?
Tower shares rose more than 18% pre-market on the announcement.
This means → the market is pricing two things: Japanese subsidies de-risk about a third of the capital outlay, and the silicon-photonics field has few players — Tower holds an early position.
This reflects a broader pattern: in the current AI-infrastructure investment cycle, any capacity expansion tied directly to AI chip interconnect commands a visible valuation premium.
Content is for reference only, not financial advice.