- Small wafer fabs can dramatically reduce start-up costs for semiconductor manufacturing worldwide
- Compact chip fabs can accelerate training of semiconductor workers across developing industries
- InchFab believes that utilization matters more than wafer size in the semiconductor economy
The semiconductor industry traditionally relies on gigantic fabrication facilities that cost billions of dollars and require years before meaningful chip production even begins.
An American startup called InchFab believes that much smaller facilities can dramatically reduce these barriers by shrinking the semiconductor manufacturing equipment itself.
Founded by MIT graduate Mitchell Hsing along with several collaborators, the company builds compact cleanroom manufacturing systems designed around smaller silicon wafers.
Smaller wafers reduce manufacturing costs
Instead of constructing sprawling industrial campuses that process massive wafer volumes, InchFab compresses manufacturing capacity into modular systems that roughly match shipping container dimensions.
The company claims these systems cost between $5 million and $15 million dollars, far below conventional semiconductor manufacturing facilities that require multi-billion dollar investments.
Hsing explained that the company initially experimented with one-inch wafers because standard photolithography fields naturally aligned with those physical dimensions.
This approach quickly ran into practical complications because one-inch wafers are difficult to purchase commercially and require manual cutting from larger substrates.
It later switched to two-inch wafers before ultimately settling on four-inch formats that balanced practicality with equipment miniaturization advantages.
According to Hsing, shrinking manufacturing systems change the physics of plasma processing because chamber surface area becomes more and more dominant over internal volume.
He noted that plasma-based systems contain protective cladding layers that prevent chamber walls from breaking down during operation.
Some engineering challenges are said to be easier under reduced dimensions because pumps, valves, mass flow controllers and vacuum control systems require smaller operating volumes.
Hsing stated that controlling compact plasma chambers simplifies several backend processes compared to maintaining stability inside large industrial semiconductor equipment operating continuously at scale.
Compact FABs support multiple techniques
InchFab claims its systems still perform many standard semiconductor manufacturing processes used in established manufacturing environments worldwide.
The company lists lithography, metrology, plasma-enhanced deposition, atomic layer deposition, dry etching and several wet processing techniques among supported manufacturing capabilities.
Hsing acknowledged that lithography remains the company’s primary limitation because feature size and production speed still depend heavily on the limitations of exposure technology.
He explained that electron beam methods can theoretically achieve extremely small geometries, although slower writing speeds reduce practical possibilities for large production volumes.
Critics question whether smaller wafers can remain economically competitive against larger fabrication facilities that process thousands of wafers each month on an industrial scale.
Hsing rejected this criticism outright, arguing that manufacturing economics depend more on utilization rate and capital efficiency than wafer dimensions alone.
“Often we can be cost competitive with an 8-inch foundry today,” Hsing said while discussing specialized industrial and aerospace manufacturing requirements.
The company currently serves customers operating in the biomedical, sensing, aerospace, defense, photonics and compound semiconductor sectors.
All these fields require low production volumes and customized process flows, which are suitable for InchFab.
InchFab’s business also involves workforce training for countries trying to establish domestic semiconductor manufacturing capacity without waiting years for large facilities.
“There’s no better way, no cheaper way, to start it than with something like an InchFab,” Hsing said during discussions around workforce development programs.
Whether compact fabs truly democratize semiconductor manufacturing remains uncertain.
Advanced chip production still relies heavily on lithographic performance and manufacturing consistency.
Still, smaller manufacturing systems may become increasingly attractive to specialized industries where flexibility, training and lower capital matter more than scale
Via IEEE Spectrum
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