Wafer processing method and system using multi-zone chuck
AssigneeTaiwan Semiconductor Manufacturing Company, Ltd.
InventorsNai-Han CHENG, Chi-Ming YANG, You-Hua CHOU, Kuo-Sheng CHUANG, Chin-Hsiang LIN
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Abstract
In a wafer processing method and a wafer processing system, a first property on a back side of a wafer is measured. The back side of the wafer is supported on a multi-zone chuck having a plurality of zones with controllable clamping forces. The wafer is secured to the multi-zone chuck by controlling the clamping forces in the corresponding zones in accordance with measured values of the first property in the zones.
Claims20
A wafer processing method, comprising:
- measuring a first property on a back side of a wafer,
- supporting the back side of the wafer on a multi-zone chuck having a plurality of zones with controllable clamping forces,
- securing the wafer to the multi-zone chuck by controlling the clamping forces in the corresponding zones in accordance with measured values of the first property in said zones.
A wafer processing method, comprising:
- measuring warpage of a wafer,
- measuring a thickness of a dielectric layer on a back side of the wafer,
- supporting the back side of the wafer on a multi-zone electrostatic chuck having a plurality of zones with controllable clamping forces,
- securing the wafer to the multi-zone chuck by controlling the clamping forces in the corresponding zones in accordance with measured values of the warpage and the thickness of the dielectric layer in said zones.
A wafer processing system, comprising:
- at least one metrology chamber configured to measure a first property on a back side of a wafer;
- a process chamber configured to perform a treatment on a front side of the wafer, the process chamber including therein a multi-zone chuck, said multi-zone chuck configured to support a back side of the wafer, the back side opposite the front side, said multi-zone chuck having a plurality of zones with controllable clamping forces, and
- a controller coupled to the metrology chamber and the multi-zone chuck, said controller configured to
- collect measured values of the first property in said zones, and
- control the clamping forces in the corresponding zones in accordance with the measured values of the first property in said zones, thereby securing the wafer to the multi-zone chuck.
Dependencies are inferred from the claim text.