Producer
AGC Inc.
Japanese glass and chemicals conglomerate (TSE: 5201, formerly Asahi Glass); world's largest EUV photomask blank supplier by revenue (~55-59% market share). EUV blank production via 100%-owned subsidiary AGC Electronics Co., Ltd. at Koriyama, Fukushima, Japan (production started January 2022; 30% capacity expansion January 2024; ¥40B+ sales target by 2025). Unrelated businesses in same parent: automotive glass (world #1 market share), architectural/float glass, pharmaceuticals and agrochemical active ingredients, life sciences. Same company that makes your car windshield also makes the blank every EUV photomask starts from.
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Inputs supplied
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Goods downstream
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Facilities
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Stories
What they make
3 inputs AGC Inc. supplies
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Where it shows up
Goods downstream
Essential goods that depend on something AGC Inc. makes — pick one to see the full supply chain.
Where they make it
4 facilities
AGC Chemicals Americas Downingtown PA (US Operations) →
USDowningtown, Chester County, Pennsylvania · chemical_plant
AGC's US chlor-alkali membrane operations and testing/distribution hub. Operates a dedicated chlor-alkali membrane testing laboratory. FLEMION membranes distributed from here to North American chlor-alkali customers. Primary FLEMION manufacturing is in Japan (likely at AGC's Chiba or Keihin complex); Downingtown is the US market interface.
AGC Electronics EUV Photomask Blank Plant (Koriyama) →
JPFukushima Prefecture · manufacturing
AGC Electronics Co., Ltd. (100% AGC Inc. subsidiary) at Machiike-dai 1-8, Koriyama, Fukushima. Production started January 2022; capacity expansion January 2024 targeting ¥40B+ in EUV blank sales by 2025 (30% capacity increase). Sole AGC facility for EUV blanks — no secondary site. Located in Fukushima Prefecture, ~200 km from Tokyo. Source: https://www.agc.com/en/news/detail/1203819_2814.html
AGC Glass Europe — Mol Plant →
BEAntwerp
Mol, Antwerp, Belgium. Primary European production site for AGC SunMax solar glass. Antimony-free manufacturing process.
AGC Inc. Tokyo HQ →
JPTokyo · headquarters
AGC (formerly Asahi Glass) global HQ; world's largest supplier of EUV photomask blanks (~55% market share).
What else they do
Business segments
The company's full revenue map — where this supply-chain role fits within their broader business.
EUV Photomask Blanks (#1 Global, ~55-59% Share)
8%Automotive Glass (World #1)
30%Architecture & Float Glass
25%Fluorine Chemistry & Life Sciences
22%Display Glass
15%
Intelligence
What's known
Sourced claims about this company's role in supply chains — chokepoints, concentration, incidents, dual-use connections.
Did you know2023
AGC Inc. is simultaneously the world's #1 EUV photomask blank supplier (enabling the chips in advanced electronics) AND the world's #1 automotive glass manufacturer (making the windshields of the vehicles those chips control). Every Toyota Camry, Honda Civic, and Nissan Altima has an AGC windshield. Every TSMC 3nm or 2nm logic chip starts its manufacturing journey on an AGC EUV mask blank. The automotive windshield and the EUV photomask blank are both precision flat glass products requiring extreme surface flatness (sub-nanometer defect control for EUV vs sub-millimeter for automotive) and thin-film coating deposition — but they serve completely unrelated supply chains. An automotive glass company is the world's largest semiconductor EUV blanks supplier. The glass in the car windshield and the glass enabling the chip that controls the engine come from the same Japanese glass company.
AGC Inc. ↗Capacity2023
AGC's CYTOP® amorphous fluoropolymer — developed specifically by AGC Chemistry division — is used in both semiconductor manufacturing AND optical fiber technology. In semiconductors: CYTOP is used as an ultra-low-k dielectric interlayer in advanced chip backend metallization, and as an anti-reflective coating layer. In optical fibers: CYTOP is used as the cladding material in multi-mode plastic optical fiber (POF) due to its very low refractive index (1.34) and transparency — enabling short-range high-bandwidth data communication in applications like automotive data buses (MOST network), medical imaging, and industrial automation. AGC's CYTOP is in both the fiber-optic network transmitting data AND the semiconductor chip processing that data — from the same AGC fluorine chemistry research laboratory in Yokohama.
AGC Inc. ↗Origin2023
AGC Inc. (formerly Asahi Glass Company) was founded in 1907 in Osaka, Japan by Toshiya Iwasaki. Asahi Glass was Japan's first domestic flat glass manufacturer, replacing imported Belgian sheet glass. The company expanded through the 20th century into automotive glass, architectural glass, and fluorine chemistry (through the 1956 acquisition of Suwa Chemical). AGC's semiconductor materials business grew from its fluorine chemistry expertise: fluoropolymer coatings for semiconductor process equipment, then specialty fluorine process gases, then photomask substrates. The EUV mask blank business (via AGC Electronics subsidiary) began in earnest after 2018 as ASML commercialized EUV lithography and demand for high-quality blanks emerged. AGC's combination of world-leading glass precision (automotive, architectural) and fluorine chemistry expertise uniquely positioned it for EUV mask blank manufacture — both require ultra-smooth glass surfaces and precise thin-film coating capabilities.
AGC Inc. ↗