TSMC pays NT$38.8B for AUO's Taichung display plant
TSMC is paying NT$38.8 billion for AUO's Taichung display plant, clean rooms included. It paid the top appraisal, and about 67% more per square metre than in 2024. Finished floor space is the scarce thing; turning it into chip floors is the step still open.
WIRE · SEMICONDUCTORS · TAIWAN · Reported 29 to 30 Oct 2026 (Taiwan)
TSMC is buying the buildings, clean rooms and plant equipment of AUO's second-phase display complex in Taichung for NT$38.8 billion (about US$1.2 billion) before tax, it said in an exchange filing on 29 October. It has not said what it will make there, only that the site is for operations and production. On the Semiconductors layer, the scarce thing is no longer just tools or wafers. It is finished, permitted floor space, and TSMC just paid full appraised price for it, where two years ago it bought a similar site at a discount.
What happened
The deal
NT$38.8 billion for 429,030 square metres of titled floor space, clean rooms and plant systems
Nine buildings in Xitun District, Taichung, in the Central Taiwan Science Park. Usable area about 166,000 ping. Paid in instalments under the sale contract
The price TSMC accepted
The higher of two appraisals: NT$38.8 billion, against NT$37.3 billion from the other valuer
Negotiated, not tendered, according to TSMC's filing. The site held Gen 5 and Gen 7.5 display lines
The seller
AUO expects a disposal gain of about NT$18.5 billion, after fees and estimated tax
The same day it cancelled a NT$19.7 billion sale of its Huaya plant to Quanta, after the two could not agree on plant specifications and handover dates
The last time
August 2024: NT$17.14 billion for Innolux's Tainan display plant, which became the AP8 packaging fab
317,445 square metres of buildings. TSMC paid below both appraisals then (NT$17.77 billion and NT$18.33 billion)
Why cash cares
A chip fab is a building first. Before a single tool goes in, someone has to win land, an environmental review, power and water hook-ups, and then put up a shell with a clean room inside it. In Taiwan that has been taking years. A display plant that has already been through all of that is a short cut, and TSMC is now paying more for the short cut.
The step-up is plain in the two filings. The Innolux plant in 2024 cost about NT$54,000 per square metre of building. The AUO site costs about NT$90,400 per titled square metre, roughly 67% more, on our arithmetic. In 2024 TSMC paid 3.5% below the lower of its two appraisals. This time it paid the higher appraisal, 4.0% above the lower one. Buyers that pay the top valuation are buyers short of time.
For AUO this is mostly profit. The expected gain of NT$18.5 billion is about 48% of the sale price, after fees and estimated tax. A panel maker that has spent years shrinking is turning its old floors into cash at a price set by the chip shortage, not the display market.
Figure: The price of a ready-made clean room went up. TSMC's two display-plant purchases from its exchange filings: total price, floor area, price per square metre and price against the two independent appraisals. The per-square-metre figures, the 67% step-up and the appraisal gaps are our arithmetic.
The step that is still open
Fit-out. A display clean room is not a chip clean room. Display lines handle huge glass sheets; chip and packaging lines handle 300 mm wafers in far cleaner air, with different vibration, chemical and water needs. TSMC still has to strip the site, re-engineer the air and utilities and install tools, and it has not said whether the floors will host wafer fabrication, advanced packaging such as CoWoS, or something else.
The last conversion gives a rough clock. Reports in late 2024 expected the Innolux plant, signed in August 2024, to start small-scale production by the end of 2025, roughly 16 months later, and TrendForce cited supply-chain sources saying the purchase let TSMC skip a slow environmental review. That is the time being bought here: not tools, but the permits and the shell. It sits beside TSMC's much larger plan, reported by Taiwan's Central News Agency, to spend about NT$1.5 trillion on four 1.4 nm fabs in the same science park from 2027. This purchase is about 2.6% of that figure, on our arithmetic, but it can be ready sooner.
It is the same constraint we traced in what a clean room is and in where cash sticks if new clean rooms stay empty into 2028: money is not short, finished space is.
The second-order read
Who gets paid. AUO, first, with a gain of about NT$18.5 billion paid in instalments. The fit-out contractors, clean-room engineers and air and water system suppliers who rebuild the site come next, before any chip tool arrives.
Who waits. Quanta. Its NT$19.7 billion purchase of AUO's Huaya plant, planned for AI server expansion, is cancelled, so it has to find floor space somewhere else. TSMC's customers wait too: extra capacity from this site is at least a fit-out away.
Who pays. TSMC, which accepted the higher appraisal for speed. The sum is small against its spending plans, but the price per square metre is a marker for the next site that comes up for sale.
Stuck step. Fit-out. TSMC owns the shell and the clean rooms on paper. It still has to turn display floors into chip floors before they earn anything.
Three cautions
TSMC has not said what the site is for. Reports that it will host CoWoS or other advanced packaging are expectations, not company statements.
The square-metre comparison is rough. The AUO figure uses titled floor area and the Innolux figure uses building area, the sites differ in age and fit-out, and neither price splits out the value of the clean rooms and equipment.
The Innolux timeline is the reported expectation from late 2024, not a confirmed start date, and a larger site may take longer to convert.
What to watch
- TSMC's October revenue, due around 10 Nov: any comment on new capacity sites and capital spending.
- The handover: when AUO receives instalments and books the gain, which shows how fast TSMC takes the keys.
- Quanta's next site: where it finds space for the AI server lines it planned for Huaya.
- The next display plant for sale in Taiwan: whether the price per square metre holds near this level. See TSMC weighs CoWoS price rises of up to 20%.
Read: what a clean room is, ASE's US$11.5 billion build and its new floors and Samsung builds clean rooms first
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Not investment advice. Do your own research. The NT$54,000 and NT$90,400 per square metre, the 67% step-up, the 3.5% and 4.0% appraisal gaps, the 48% gain share and the 2.6% share of the 1.4 nm plan are our arithmetic.
References
- TSMC exchange filing via Anue (cnyes), "公告本公司取得廠房及附屬設施", 29 Oct 2026. Price, floor area, counterparty, appraisals, purpose.
- TechNews, "友達華亞廠出售廣達破局，台中廠 388 億元賣台積電", 29 Oct 2026. AUO's NT$18.5 billion gain, instalments, cancelled Quanta deal.
- DIGITIMES, "AUO sells Taichung plant to TSMC for NT$38.8B, scraps Quanta deal", 29 Oct 2026. US dollar value and Quanta deal size.
- TrendForce, "Display Maker AUO to Sell Taichung Plants to TSMC for TWD 38.8B", 30 Oct 2026. Gen 5 and Gen 7.5 lines, conversion caveats, 1.4 nm plan.
- TSMC exchange filing via MoneyDJ, Innolux plant purchase, 15 Aug 2024. NT$17.14 billion, 317,444.93 square metres, appraisals.
- TrendForce, "TSMC's Newly Acquired AP8 Facility Rumored to Start Production in 2H25", 24 Sep 2024. Expected conversion timeline and environmental review.
