India Semiconductor Timeline 2026–2030: Fabs, OSAT Plants, Tata, Micron & the Chip Manufacturing Race

Fab (fabrication plant)

A fab starts with blank silicon wafers and builds the transistor structures and integrated circuits directly onto them, layer by layer, using photolithography, thin-film deposition, etching and doping. This is the most capital-intensive and technically demanding step. Example: Tata–PSMC, Dholera. SiCSem in Odisha is a fab too, but for silicon carbide rather than silicon logic.

OSAT (Outsourced Semiconductor Assembly and Test)

An OSAT facility receives fabricated wafers or dies and performs the backend: wafer dicing, die attach, wire bonding or flip-chip, encapsulation and final testing. It is real semiconductor manufacturing, with its own yield and reliability challenges, but it does not create the circuits. Examples: CG Semi, Kaynes Semicon, Tata Assam.

ATMP (Assembly, Testing, Marking and Packaging)

ATMP is the term Indian policy documents often use for the same backend activity, sometimes with the marking (laser-etched part numbers) step called out. Example: Micron Sanand, which packages and tests memory. Functionally, ATMP and OSAT describe the same part of the chain.

The key point: OSAT and ATMP production is genuine manufacturing and a real milestone for India. It is still not the same thing as fabricating the wafer.

The Tata Electronics–PSMC plant at Dholera, Gujarat, is India’s first pure-play semiconductor foundry — a fab that manufactures chips designed by customers rather than selling its own branded products. The customer designs the chip; the foundry makes it.

Technology partner: Powerchip Semiconductor Manufacturing Corporation (PSMC) of Taiwan, a mature-node specialist. This is not TSMC — a different Taiwanese company with a similar-sounding name. Wafer size: 300 mm (12-inch). Planned capacity: up to 50,000 wafers per month. Technology range: 28 nm to 110 nm, covering power-management ICs, display drivers, microcontrollers and high-performance-computing logic, for automotive, computing, communications and data-storage customers. The approved project value is ₹91,526 crore (Tata’s own wording is “up to ₹91,000 crore”), roughly $11 billion.

Status, August 2026: under construction. A 66-hectare SEZ was notified in April 2026 and an ASML lithography-equipment agreement signed in May. Claims that the fab is around half built with a late-2026 pilot are project projections. First wafers are a target for late 2026; industry reporting suggests the fab may open at 90 nm and reach commercial scale around 2028. Until wafer production actually begins, the correct status is under construction, not operating.

The Tata Semiconductor Assembly and Test facility at Morigaon (Jagiroad), Assam, is an OSAT / ATMP plant — assembly, packaging and test — not a wafer fab. Approved value is about ₹27,120 crore, with a planned full-scale capacity of 48 million packaged units a day — 4.8 crore units — serving automotive, EV, communications and consumer markets. That figure is a target for full ramp, not current output.

An earlier government roadmap expected Phase 1 to begin around April 2026. As of August 2026, the minister’s language is that the plant is “likely to begin operations within FY2026–27” — commissioning has not been confirmed as complete, and there is no verified first-chip event. The strategic value is regional: it puts a large, skilled-manufacturing employer in the north-east and diversifies the packaging base beyond Gujarat.

We use a fixed set of status labels so a ribbon-cutting is not mistaken for a mature industry. Proposed: announced only. Approved: formal Government of India approval. Under construction: physical site work underway. Pilot: a limited production or test line. Commercial production: company or government confirms commercial operations. Full ramp: rated production reached or formally reported. For each facility we separate announcement date, approval date, construction start, pilot and commercial-production date — they are different milestones and are often reported as if interchangeable.

A ribbon-cutting ceremony is not the same as a mature semiconductor industry. The difficult milestones come afterward: equipment has to run reliably, production yields have to improve, customers have to qualify the chips, suppliers have to locate nearby, and factories have to keep producing at commercial scale for years.

That is why India’s semiconductor story should now be measured less by the number of announcements and more by what is actually coming off production lines.

India’s semiconductor push entered a different phase in 2026. Micron began assembly and test operations in Sanand. Kaynes moved into production. CG Semi began commercial output. Those milestones matter because they replace future-tense promises with physical production.

But the most technically difficult step is still ahead. India has to bring large-scale wafer fabs into reliable commercial operation, develop local materials and equipment suppliers, raise manufacturing yields and build deeper advanced-packaging capability. Tata’s Dholera fab will be one of the most important industrial tests of the decade. If it succeeds, India will no longer be only a place where chips are designed and packaged — it will also be a place where the silicon itself is manufactured at commercial scale.

2026 proved India can start producing semiconductor products. The next test is whether it can build an entire chip ecosystem around them.