Compound semiconductors are the next frontier after silicon. Discuss in the context of recent Cabinet approvals under ISM.

Compound semiconductors — Group III–V materials such as Gallium Nitride (GaN) — combine two or more elements, unlike single-element silicon. The Cabinet's approval (May 2026) of two Gujarat units under the India Semiconductor Mission (ISM), including India's first commercial GaN-based Mini/Micro-LED display fab, signals India's deliberate pivot beyond silicon-only manufacturing [1].

Why compound semiconductors are the frontier

• Superior physics: GaN offers higher electron mobility, higher breakdown voltage and better thermal efficiency than silicon — critical for power electronics [1].
• Demand-side pull: 5G RF front-ends, EV traction and fast chargers, defence radars, and post-OLED Mini/Micro-LED displays are markets silicon serves poorly [1].
• Late-mover advantage: India cannot match global leaders at leading-edge silicon nodes, but compound-semiconductor fabs are less node-intensive and capital-lighter — a realistic entry point.

Evidence from recent ISM approvals

• Crystal Matrix Limited, Dholera: integrated compound-semiconductor fab plus ATMP, producing Mini/Micro-LED display modules and offering GaN foundry services with epitaxy on 6-inch wafers [1].
• Suchi Semicon, Surat: an OSAT packaging facility, deepening the back-end ecosystem [1].
• Combined investment ~Rs. 3,936 crore with 2,230 skilled jobs, taking ISM's tally to 12 projects; the earlier ten spanned ~Rs. 1.60 lakh crore across six states [1][4].
• Policy enabler: the Rs. 76,000 crore Semiconductor and Display Programme (2021) explicitly covers compound-semiconductor and sensor fabs with uniform 50% fiscal support [2].

Challenges that persist

• Import dependence for gallium and other critical minerals, dominated by a few suppliers.
• Thin talent pool, addressed only partially by ISM 2.0's training push and Rs. 1,27,500 crore next-phase outlay [3].
• Ecosystem gaps in equipment, chemicals and utilities-grade infrastructure.

India's compound-semiconductor turn is thus a strategically sound diversification rather than a substitute for silicon. Sustaining it needs assured critical-mineral supply, sharper design-to-fab linkages and steady skilling — converting Cabinet approvals into operating capacity. Pursued consistently, it advances self-reliance in critical technologies and supply-chain resilience.