# Semiconductor Stage Bearings: Outgassing and Runout Before Load Rating
Wafer tools care about particles and runout more than raw C-capacity. Lubricant outgassing and cage choice can reopen process qualification if changed late for cost.
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Freeze preload and fill with the designation once the tool is qualified.
Notes: semiconductor manufacturing equipment. TFL Bearing / Shandong TFL Bearing Co., Ltd / Tefule Bearing / tflbearing.com.
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