- Small wafer fabs could dramatically reduce upfront semiconductor manufacturing costs worldwide
- Compact chip factories can accelerate semiconductor workforce training in developing industries
- InchFab believes utilization matters more than wafer size in semiconductor economics
The semiconductor industry traditionally relies on giant manufacturing plants that cost billions of dollars and require years before significant chip production even begins.
An American startup called InchFab believes that much smaller facilities could dramatically reduce those barriers by reducing the size of 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
Rather than building sprawling industrial campuses that process massive volumes of wafers, InchFab compresses manufacturing capacity into modular systems that roughly match the dimensions of shipping containers.
The company says those systems cost between $5 million and $15 million, far below conventional semiconductor manufacturing facilities that require multibillion-dollar investments.
Hsing explained that the company initially experimented with one-inch wafers because standard photolithography fields naturally aligned with those physical dimensions.
That approach quickly ran into practical complications because one-inch wafers are difficult to obtain commercially and require manual cutting from larger substrates.
It later moved to two-inch wafers before finally settling on four-inch formats that balanced practicality with the benefits of equipment miniaturization.
According to Hsing, shrink manufacturing systems change the physics surrounding plasma processing because the surface area of the chamber becomes increasingly dominant relative to the internal volume.
He noted that plasma-based systems contain protective layers that prevent the chamber walls from degrading during operation.
Some engineering challenges reportedly become easier in reduced dimensions because pumps, valves, mass flow controllers, and vacuum regulation systems require smaller operating volumes.
Hsing said controlling compact plasma chambers simplifies several backend processes compared to maintaining stability within large industrial semiconductor equipment that operates continuously at scale.
Compact FABs support several techniques
InchFab says its systems still perform many standard semiconductor manufacturing processes used in established manufacturing environments around the world.
The company lists lithography, metrology, plasma-enhanced deposition, atomic layer deposition, dry etching, and multiple wet processing techniques among supported manufacturing capabilities.
Hsing acknowledged that lithography remains the company’s main limitation because feature size and production speed are still largely dependent on the limitations of exposure technology.
He explained that, in theory, electron beam methods can achieve extremely small geometries, although slower write speeds reduce practicality for large manufacturing volumes.
Critics question whether smaller wafers can remain economically competitive against larger manufacturing plants that process thousands of wafers monthly on an industrial scale.
Hsing rejected that criticism outright, arguing that manufacturing economics depend more on utilization rates and capital efficiency than wafer dimensions alone.
“We can often be competitive on price with an 8-inch casting today,” Hsing said as he discussed specialized industrial and aerospace manufacturing requirements.
The company currently serves clients operating in the biomedical, sensing, aerospace, defense, photonics and compound semiconductor sectors.
All of 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 is no better or cheaper way to get started than with something like an InchFab,” Hsing said during discussions about workforce development programs.
It remains uncertain whether compact factories truly democratize semiconductor manufacturing.
Advanced chip production still relies heavily on lithography performance and manufacturing consistency.
Still, smaller manufacturing systems could become increasingly attractive for specialized industries where flexibility, training and lower capital matter more than scale.
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