Wafer fab process integration

In 1987, India was just two years behind the world's frontier in chip manufacturing. Today it is twelve generations behind. The gap did not open through neglect of a single decision but through decades of interrupted momentum — the Semiconductor Complex Limited in Chandigarh had climbed from a 5000 nm process in 1984 to 800 nm by the mid-1980s before a 1989 fire gutted the complex and set progress back a decade.

Wafer fab process integration is the discipline of running hundreds of sequenced steps — patterning, etching, deposition, inspection — on a silicon wafer with near-zero tolerance for error. A single contamination event during process tool qualification can delay first silicon by months. Only a handful of nations run production-scale front-end fabs: Taiwan, South Korea, Japan, the United States, China, and Singapore.

India has no indigenous wafer fab process integration capability yet, but is building its first modern facility with foreign technology transfer. Tata Electronics and Taiwan's PSMC completed a technology transfer agreement in September 2024 for a 300mm fab in Dholera, with 50,000 wafers per month planned. Construction crossed the halfway mark by July 2026, with cleanroom installation and equipment calibration underway; first silicon is targeted for late 2026. ASML signed a strategic partnership in May 2026 to supply manufacturing equipment. PSMC is not a leading-edge logic foundry — it specialises in specialty DRAM and power management ICs — but its 28nm-90nm nodes cover the majority of chips India currently imports.

Two compound-semiconductor projects were approved in August 2025 in Bhubaneswar: SiCSem, with UK partner Clas-SiC, building a silicon carbide fab (₹4,600 crore, 60,000 wafers a year); and a 3D Glass Solutions advanced packaging facility. But the facilities operational today — Micron's Sanand ATMP plant, inaugurated February 2026, and Kaynes Semicon's OSAT line — are back-end assembly and testing, not front-end fabrication.

The gap persists because integration rests on capabilities India does not yet own end to end: lithography, etch and deposition tools, metrology, and above all deep process engineering expertise transferred through practice, not paper. India imports 90% of wide bandgap chips and most mature-node logic and analog parts. ISM incentives are performance-linked, so qualification delays carry direct financial cost.

What it would take is visible in the current programmes: sustained technology transfer, a first successful yield ramp at Dholera, and the accumulation of process knowledge that turns a built cleanroom into a working fab. As of 2026, 13 projects are approved and the first front-end silicon is a target, not yet a fact.