The Four Key Indicators of Wafer Processing Performance

In the semiconductor wafer manufacturing industry, processing performance directly determines a company's market competitiveness, economic benefits, and customer satisfaction. Among these, four core indicators—WPH (Wafers Per Hour), Cp and Cpk values, uptime percentage, and rework rate—serve as crucial benchmarks for measuring wafer processing performance. They comprehensively cover capacity, process precision, equipment stability, and cost control, collectively forming the core support system for wafer processing quality and efficiency.

Long-Term Equipment Performance: It’s Not Just About Parameters, But More About the Supplier’s Accumulated Expertise

In semiconductor manufacturing, the long-term stable operation of equipment is the core of production line efficiency, yield, and cost control. Many people, when selecting equipment, tend to fixate on paper specifications but often overlook a key fact: parameters represent instantaneous capabilities, while the supplier’s industry accumulation determines whether the equipment can operate reliably for years under harsh working conditions. Truly production-line-worthy equipment is never a product of parameter stacking, but rather honed by time, experience, and real-world data.

Specific Contents and Cycles of Preventive Maintenance for Wet Process Equipment

Preventive maintenance for semiconductor wet process equipment requires dividing maintenance contents by cycles, progressing from daily inspections to annual overhauls, comprehensively covering all components of the equipment with a focus on maintaining liquid-contacting components and precision control components. The specific contents are as follows:

wet etch - Within-Wafer Uniformity

In semiconductor wet etching processes, Within-Wafer Uniformity is a core metric for measuring equipment precision and process stability, and a key factor determining the performance consistency of individual chips. Unlike Wafer-to-Wafer Uniformity (WIL), which focuses on the replicability of multiple wafers, Within-Wafer Uniformity emphasizes the uniformity of etching effects from the center to the edge of a single wafer.

wet etch - Within-Lot Uniformity

In the quality control system of semiconductor wet etching processes, Wafer-to-Wafer Uniformity (Within-Lot Uniformity, abbreviated as WIL) and Within-Wafer Uniformity together form dual core metrics, each playing distinct yet complementary roles.