The desk
The fab desk
Published 3 August 2026. Facts verified to 27 July 2026 unless dated otherwise.
The plant explained: what is inside a wafer fab, what each step does, what it consumes, and why its schedule behaves the way it does.
The fab desk explains the plant itself: what a wafer fab is, how each process step works, what it consumes, what it costs and why schedules move. It is the engineering layer behind every claim made about India's first commercial fab.
What a Semiconductor Fab Actually Is
A semiconductor fab is a chemical plant, a cleanroom and a precision machine shop stacked into one building.
Semiconductor Cleanrooms
Cleanroom classes explained for semiconductor fabs: particle counts, laminar airflow, vibration criteria, temperature and humidity control, and why the specification drives fab construction cost and schedule.
Lithography Explained
How photolithography works in semiconductor manufacturing: resist, masks, projection optics, resolution limits, immersion and EUV, and why lithography tools are the scarcest capital equipment in the industry.
Etch and Deposition
Deposition and etch explained: CVD, PVD and ALD film growth, plasma etching, selectivity and anisotropy, and why these tools consume the largest share of a fab's specialty gas supply.
Ultrapure Water in Chip Making
Why semiconductor fabs need ultrapure water, how it is produced through multi-stage treatment, how much a fab uses, recycling rates, and why water availability is a genuine fab siting constraint.
Specialty Gases and Chemicals
Bulk and specialty gases in semiconductor manufacturing: nitrogen, oxygen, hydrogen, argon, electronic specialty gases, photoresist and wet chemicals, why purity grades matter, and why gas plants site next to fabs.
Silicon Wafers
How silicon wafers are made: polysilicon, Czochralski crystal growth, slicing, lapping and polishing, epitaxy, 300mmThe industry-standard large wafer size used by modern commercial fabs, including Dholera's. economics, and why wafer supply is a concentrated global industry.
Packaging and Test (OSAT)
Back-end semiconductor manufacturing explained: wafer probe, dicing, die attach, wire bond and flip chip, moulding, final test, and why advanced packaging has become a competitive frontier.
Why Fabs Slip
Semiconductor fab schedules slip for structural reasons: tool lead times, hook-up and qualification, utility commissioning, workforce ramp and yield learning.
Where Fab Money Goes
How semiconductor fab capital is actually spent: equipment versus construction, the dominance of tool cost, cleanroom and utility systems, and why headline investment figures are not construction budgets.
Why a Dholera publication runs an engineering desk
Because almost every argument about the region eventually rests on a technical question: whether a date is achievable, whether a supplier signal is meaningful, whether a headline number means what it appears to mean. Answering those honestly requires knowing how the plant works. No real-estate site in this market can write these pages, which is precisely why they are here.