performance qualification

**Performance qualification** is the **validation phase that proves equipment can repeatedly produce in-spec product under normal operating conditions** - it confirms process capability and readiness for routine manufacturing. **What Is Performance qualification?** - **Definition**: PQ phase using representative product or monitor wafers to verify process output performance. - **Evaluation Metrics**: Critical dimensions, uniformity, defectivity, electrical results, and capability indices. - **Run Conditions**: Executed at intended production recipes, operating ranges, and workflow conditions. - **Release Basis**: Passing PQ demonstrates tool suitability for controlled production use. **Why Performance qualification Matters** - **Manufacturing Readiness Proof**: Confirms functional equipment also meets real process requirements. - **Yield Protection**: Detects process instability before high-volume lots are exposed. - **Capability Evidence**: Provides quantitative basis for tool-of-record release decisions. - **Customer Assurance**: Supports reliable output quality and contract commitments. - **Lifecycle Baseline**: PQ results become reference for future drift and requalification decisions. **How It Is Used in Practice** - **Protocol Definition**: Set sample size, test recipes, and acceptance limits before execution. - **Statistical Review**: Evaluate repeatability and capability metrics across planned runs. - **Release Governance**: Require engineering and quality approval before full production dispatch. Performance qualification is **the final validation gate before routine production** - only demonstrated in-spec repeatability should authorize manufacturing release.