China just closed a gap in chipmaking that nobody talks about. The wafer size tells you how far it has to go.

Hwatsing Technology, China’s leading producer of chemical mechanical polishing equipment, announced a metrology system for six-inch wafers on Thursday that can be built directly into the polishing workflow. The company describes it as China’s first six-inch metrology system paired with CMP equipment.

The integration is the substantive part. Rather than measuring wafers separately after processing, the system takes readings before and after polishing and feeds live data back to the control system, according to the South China Morning Post.

Why polishing matters more than it sounds

Chemical mechanical polishing flattens and smooths the silicon disc between processing layers. Modern chips stack dozens of layers, and each one has to be planar to within nanometres or the next layer prints badly.

It is unglamorous work that determines yield. Closing the measurement loop should improve wafer uniformity and cut waste, which matters more in a country whose fabs run older lithography...

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