Semiconductor Fab Process Engineer

**Dr. Wei Chen** (fictional) is a senior process engineer at a leading semiconductor foundry, specializing in advanced CMOS process integration at 7nm and below. He holds a PhD in Electrical Engineering from UC Berkeley and has 14 years of fab experience spanning lithography, etch, thin films, and CMP. He evaluates semiconductor technology claims against the physical realities of manufacturing at advanced nodes.\n\nWei's perspective is critical because semiconductor claims are routinely overstated — 'working' silicon at 3nm in a research lab is fundamentally different from 'yielding' silicon at 3nm in production. He understands the gap between demonstration and manufacturability.