High-purity silicon wafers

Can India manufacture high-purity silicon wafers at scale and quality?

Every semiconductor-grade silicon wafer used in India is imported. As of 2026, the country has no commercial domestic production of the polished single-crystal discs on which all chips are built, and it imports its solar-grade wafers too. This is the physical floor of the entire electronics economy, and India does not yet stand on it.

The difficulty is real. Only about ten companies in the world can make semiconductor-grade wafers at all. Two Japanese firms, Shin-Etsu and SUMCO, together hold over half of global 300mm capacity; the standard 300mm wafer is the workhorse of modern logic and memory manufacturing. Production is capital-intensive, and the technology transfer requirements are stringent. A wafer maker must grow near-perfect silicon crystals, slice them, and polish them to a flatness measured against contamination levels most industries never confront.

India's position is emerging but honest to itself. The furthest-along project is a solar-wafer fab: Premier Energies signed a 74:26 joint venture in May 2025 with Sino-American Silicon Products to build a 2 GW line, with commercial operation targeted for June 2026. Adani Solar recently started producing 2 GW of nameplate ingot and wafer capacity as of June 2026, though it paused its polysilicon plant plans after prices collapsed. On the equipment side, Raana Semiconductors — the only private Indian company working exclusively on Czochralski crystal-growth systems, the furnaces that pull silicon ingots from a melt — raised $3 million in seed funding in January 2026 and holds ₹12 crore in FY26 orders from DRDO, DAE and C-MET, supplying semiconductor-grade silicon for defence use. It plans to commercialise solar-grade CZ systems within 18 months. Semiconductor-grade wafer production remains at R&D stage only.

The gap persists because the layers beneath it are missing. India has zero commercial polysilicon production — the raw feedstock — with announced plans from Reliance, Adani and Jindal unfulfilled for over a decade. The critical downstream processes are equally absent: wire-saw slicing, chemical-mechanical polishing, and epitaxial deposition all stand at none. Only cleanroom infrastructure is demonstrated. A wafer fab cannot be conjured above an empty supply chain.

What it would take is visible in the sequencing already underway: indigenous crystal-growth equipment first, solar-grade wafers as the volume proving ground, and polysilicon feedstock built beneath both. Semiconductor-grade capability is the summit of that climb, not its starting point — and India is presently at the base.