India's Electronics and Information Technology Minister, Ashwini Vaishnaw, has provided a comprehensive explanation of the complex semiconductor manufacturing process, tracing the journey from raw silica-rich sand to the sophisticated silicon chips powering modern devices. This detailed breakdown comes as India intensifies its efforts to build a robust domestic semiconductor industry.
The Journey from Sand to Wafer
Minister Vaishnaw elucidated that the foundational step in semiconductor manufacturing begins with silica-rich sand. This sand is processed to create a silicon ingot, a large cylindrical solid. The ingot is then meticulously sliced into extremely thin circular pieces known as bare wafers, which serve as the base for all subsequent circuitry.
He emphasized the extraordinary precision required during the fabrication process, where circuits are etched onto these wafers. To illustrate, Vaishnaw drew an analogy: “Imagine writing your name on your fingernail.” He further explained that fabricating a chip demands a level of precision far beyond manual human capability, akin to writing the contents of multiple textbooks on that same tiny surface.
During fabrication, multiple layers are built onto the wafer, with Vaishnaw likening the 40 to 50 layers to a 40- or 50-storey building, despite the wafer's thickness being comparable to the tip of a pen.
From Wafer to Finished Chip
Once the circuits are etched and the layers are complete on the fabricated wafer, individual chips are extracted. These chips then undergo a critical process known as ATMP (Assembly, Testing, Marking, and Packaging). This stage ensures that each semiconductor chip is fully functional, properly identified, and securely packaged, ready for integration into various electronic products, such as memory modules for computers.
India's Growing Semiconductor Ambition
The Minister highlighted India's historical lack of a semiconductor industry despite earlier attempts, noting that the nation is now successfully establishing this crucial sector. The government's vision extends beyond just fabrication plants, aiming to develop an entire semiconductor value chain within the country, encompassing mobile phone manufacturing, IT hardware, components, and chip design.
Under “Semiconductor Mission 1.0,” twelve plants have received approval, with three already operational and commercially manufacturing chips. Vaishnaw proudly displayed two such chips produced in Indian facilities, acknowledging this as a significant “beginning” rather than an end goal.
Building a Design Ecosystem and Future Vision
Beyond manufacturing, India is also fostering a nascent but growing semiconductor design ecosystem. Vaishnaw showcased a chip designed by one of the government's Design Linked Incentive (DLI) partners and highlighted contributions from students across various cities, underscoring the broad-based approach to talent development.
He attributed this progress to an ecosystem-building strategy, guided by Prime Minister Narendra Modi's directive to “think 20 years ahead” rather than focusing solely on short-term gains. Following the success of Semicon 1.0, the government is now launching “Semicon 2.0” to further accelerate these initiatives, with plans to release detailed educational content for students interested in the semiconductor industry.