High-purity precursor chemistry

A semiconductor fab cannot run for a single day without them, yet India imports virtually all of its semiconductor precursor chemicals. The domestic production of ultra-high-purity grades is minimal, and the products India does make fall short of the purity a fab demands.

What it is, and why it is hard

Precursors are the reactive chemicals that deposit atomically thin films inside a chip. The purity target is punishing: gallium nitride fabrication, for example, needs precursor gases at 99.99999 per cent purity, with metal impurities verified to parts per billion or trillion. Many of the most important precursors — the metal-organic compounds used in vapour deposition — are toxic and pyrophoric, igniting on contact with air, which forces stringent handling, specialised containers and robust facility design.

The market reflects that difficulty. It is highly consolidated: Merck, Air Liquide and SK Materials together hold over 35 per cent of a market valued at roughly US$2.5 billion in 2024, sustained by vertically integrated supply chains and proprietary synthesis. Asia-Pacific, led by South Korea and Japan, hosts over 60 per cent of global capacity. Germany, France and South Korea anchor possession of the capability.

Where India stands

India's large chemical industry makes acids, solvents and industrial gases in bulk — but these lack the ultra-high purity semiconductors require. Photoresists, ultrapure water, high-purity hydrogen peroxide and etching chemicals are minimal to non-existent.

The ecosystem is early. DRDO's Solid State Physics Laboratory achieved a GaN breakthrough in March 2023, then flagged ultra-pure precursor gases and reactors — still imported from the US and Europe — as the critical remaining dependency, tasking academia to indigenise them. Shree Ganesh Life Sciences reports production of organosilicon precursors such as hexamethyldisilane and trimethylchlorosilane from a Gujarat facility, though scale and purity specifications are not detailed. Specialty chemical firms including Aether Industries and Shree Ganesh Remedies claim relevant synthesis expertise. The India Semiconductor Mission 2.0, backed by ₹8,000 crore in the 2026-27 Union Budget, targets materials manufacturing — but no precursor-specific projects were operational as of July 2026.

Why the gap persists

The barrier is foundational: ultra-high-purity synthesis, metal-organic compound chemistry, and purity testing to ppb/ppt levels remain emerging capabilities. Even where a supplier has a qualifying product, semiconductor vendor qualification typically takes two to three years.

Closing the gap will need either indigenous innovation or technology transfer through international partnerships, alongside sustained talent development in chemical engineering and fab processes. India's electronic chemicals market is projected to reach US$7-9 billion by 2030 — the pull exists; the purity does not yet.