What project owners need to know.
A chip fab buys polished or epitaxial silicon wafers as its starting material; it does not grow them. India's first commercial fab, Tata Electronics' 300 mm plant at Dholera in Gujarat, approved in February 2024 for 50,000 wafer starts per month, will therefore need a qualified supply of 300 mm prime wafers, a product made at scale by a small group of global specialists. No domestic producer of 300 mm semiconductor wafers has been announced in public sources we have reviewed, so building that upstream step — from high-purity quartz and polysilicon to chip-grade ingots — is a separate, longer-horizon question for India's materials policy.
The short answer
A fab is a wafer processor. It receives finished, polished silicon wafers and builds transistors and interconnects on them. The wafer itself is made upstream by a separate industry that grows single-crystal ingots, slices them, and polishes or epitaxially coats the slices to extremely tight flatness, cleanliness and defect limits.
So the question for India is not whether Dholera will make wafers — it will consume them — but where qualified wafers will come from, and whether any part of that upstream chain can sensibly be built in India over time.
- Fabs process wafers; wafer makers grow, slice and polish them
- Every new fab creates a recurring demand for qualified prime wafers
- Wafer qualification is slow, so the first supply is usually established suppliers
India's first fab, in official terms
The Union Cabinet approved Tata Electronics' fab with Powerchip Semiconductor Manufacturing Corporation (PSMC) of Taiwan on 29 February 2024, at an investment of Rs 91,000 crore and a capacity of 50,000 wafer starts per month, covering 28 nm high-performance compute chips and power management chips. Tata Electronics describes it as a 300 mm (12-inch) fab for analog and logic ICs on 28 nm to 110 nm technologies.
On 16 April 2026 the Ministry of Commerce and Industry notified a 66.166-hectare special economic zone at Dholera for Tata Semiconductor Manufacturing, which the release describes as India's first chip fabrication plant. Timelines for volume production should be taken from the company's own statements as they are made.
- Approved: 29 Feb 2024, Rs 91,000 crore, 50,000 WSPM
- Format: 300 mm, 28–110 nm analog and logic
- SEZ notified: 16 Apr 2026, 66.166 ha
What semiconductor-grade wafers require
Chip wafers and solar wafers both start as Czochralski-grown monocrystalline silicon, but the specifications are different in kind. SFA Oxford describes solar-grade polysilicon as 6N to 9N pure and electronic-grade silicon for chips as 9N to 11N. Beyond bulk purity, chip wafers need tight control of oxygen and carbon, metallic contamination, crystal-originated defects, resistivity uniformity, flatness and surface particles, verified with metrology far beyond what a solar line uses.
Format differs too. Chip wafers are round, typically 200 mm or 300 mm in diameter, and are polished, with epitaxial layers added for many logic and power devices. Mainstream solar wafers are square formats of roughly 182 to 210 mm, as-cut and textured. A solar wafer cannot be repurposed as a chip wafer; the overlap is in the upstream know-how of growing clean, low-defect crystal.
- Purity: electronic grade 9N–11N vs solar grade 6N–9N
- Format: round 200/300 mm polished or epitaxial vs square as-cut solar
- Tighter limits on oxygen, carbon, metals, defects and flatness
- Qualification is fab-specific and can take many months
Who makes prime wafers today
Global supply of semiconductor wafers is concentrated. Industry rankings have for years been led by Shin-Etsu and SUMCO of Japan, GlobalWafers of Taiwan, Siltronic of Germany and SK Siltron of Korea, with Soitec of France prominent in specialty substrates. SEMI reports that worldwide silicon wafer shipments reached 12,973 million square inches in 2025, up 5.8% on the year, while wafer revenue slipped 1.2% to US$11.4 billion, with growth led by advanced epitaxial wafers for logic and polished wafers for high-bandwidth memory.
For a new fab anywhere, the practical path is to qualify one or more of these established suppliers first. Domestic wafer production, where it emerges, typically follows once local fab demand is large and stable enough to justify a qualified ingot-to-wafer line.
- A handful of global makers supply most 300 mm prime wafers
- 2025 global shipments: 12,973 MSI (SEMI)
- New fabs usually dual-qualify established suppliers before any new source
Policy: the materials pillar and the upstream ladder
India Semiconductor Mission 2.0, approved as Semicon 2.0 in July 2026, adds an explicit pillar for machines and materials alongside fabs and packaging. That matters because wafers sit at the top of a longer materials ladder: high-purity quartz for crucibles, polysilicon, chip-grade single-crystal ingots, then slicing, polishing and epitaxy. Each step has its own qualification hurdle.
What would have to be true for domestic 300 mm wafers? Reliable local fab demand at volume; access to electronic-grade polysilicon; crystal growth, slicing and polishing equipment with process know-how; metrology and cleanroom infrastructure; and years of customer qualification. Earlier rungs — quartz, crucibles, and ingot growth for solar and power devices — are where Indian capability can be built and proven first.
- Quartz and crucibles → polysilicon → chip-grade ingot → polished/epi wafer
- Semicon 2.0 recognises materials, but wafer making needs its own qualification path
- Build and prove upstream capability on earlier rungs first
How JRST supports this requirement
JRST works on the upstream steps of the silicon chain — high-purity quartz, crucibles and Czochralski ingot growth, including Maharashtra's first silicon-ingot pilot line in Nagpur — and supports Indian teams on equipment sourcing and qualification planning. This guide summarises public sources as of the date shown and makes no claim of 300 mm wafer capability; specifications, timelines and suitability must be validated for each project.
Discuss your requirement
Mohammed Saif Zaveri connects JRST's industrial content to execution conversations.
As Co-Founder and designated partner of JRST Technology LLP, Mohammed Saif Zaveri works across industrial growth, strategic partnerships, client conversations, equipment strategy, and project pathways for silicon, solar, semiconductor, and advanced-manufacturing opportunities.
This knowledge page is part of JRST's public industrial knowledge base, designed to help buyers move from search terms and early research toward a structured technical-commercial discussion.
View Mohammed Saif Zaveri's profileConnect on LinkedInFrequently asked questions
Does India make semiconductor wafers?
Not at 300 mm prime-wafer scale, based on public sources we have reviewed. India's first fab at Dholera will process wafers, and new fabs typically qualify established global wafer suppliers first.
What is a 300 mm wafer?
A round, polished slice of single-crystal silicon 300 mm (12 inches) in diameter, the standard format for leading logic and memory fabs. The Dholera fab is a 300 mm fab.
Why can't solar wafers be used for chips?
Chip wafers need higher silicon purity (typically 9N–11N vs 6N–9N for solar), much tighter control of oxygen, metals and crystal defects, a round polished or epitaxial format, and fab-specific qualification. Solar wafers are square, as-cut and specified for a different process.
Who are the main semiconductor wafer manufacturers?
Industry rankings have long been led by Shin-Etsu, SUMCO, GlobalWafers, Siltronic and SK Siltron, with Soitec prominent in specialty substrates.
What capacity is the Dholera fab approved for?
The Union Cabinet approved 50,000 wafer starts per month at an investment of Rs 91,000 crore on 29 February 2024, with PSMC of Taiwan as technology partner.
Where does high-purity quartz fit into chip wafers?
Chip-grade single crystals are grown from molten silicon in fused-quartz crucibles, so crucible-grade quartz is one of the earliest inputs in the wafer supply chain.
Primary sources and further reading
Last reviewed 2026-10-21. Technical scope, policy eligibility, availability, and commercial terms should be independently confirmed for each project.