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| Metric | Acceptable Range (Typical) | Critical Defect Threshold | | :--- | :--- | :--- | | | 50% to 150% of nominal | <50% (Insufficient solder) or >150% (Excess solder) | | Height | 40% to 60% of stencil thickness | <40% (Poor release) or >60% (Smearing potential) | | Area | 50% to 150% of nominal | <50% (Missing paste) or >150% (Bridging risk) | | Alignment (Offset) | <25% of pad width | >25% to 50% (Warning) or >50% (Defect) | ipc7801 pdf
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