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US 6,611,417 B2Granted
Wafer chuck system
AssigneeWinbond Electronics Corp.
InventorFu-Sheng Chen
Life of this patent
Estimating the term…
Abstract
A chuck system applicable to semiconductor fabrication processes for holding a workpiece that includes a pedestal that has an upper surface for supporting a semiconductor wafer, a plurality of gas holes and grooves. The gas holes pass through the pedestal and provide channels for gas to reach the semiconductor wafer. The grooves are formed on the upper surface of the pedestal and connect between the gas holes.
Claims20
A chuck system, comprising:
- a pedestal having an upper surface for supporting a semiconductor wafer;
- a plurality of gas holes passing through the pedestal, the gas holes providing channels for gas to travel therethrough;
- and
- a plurality of grooves on the upper surface of the pedestal, the grooves connecting the gas holes, wherein at least one of the grooves connects only two adjacent gas holes.
1 more element
An electrostatic chuck system, comprising:
- a pedestal having an upper surface for supporting a semiconductor wafer;
- a plurality of gas holes passing through the pedestal, the gas holes providing channels for gas to reach the semiconductor wafer;
- and
- a plurality of grooves on the upper surface of the pedestal, the grooves including linear grooves and curved grooves connecting between the gas holes, wherein at least one of the grooves connects only two adjacent gas holes.
1 more element
A chuck system, comprising:
- a pedestal having an upper surface for supporting a semiconductor wafer;
- a plurality of gas holes passing through the pedestal, the gas holes providing channels for gas to reach the semiconductor wafer, the gas holes including
- a center gas hole in the center of the pedestal,
- a first set of gas holes arranged in a circular pattern on the pedestal in a first radius, and
- a second set of gas holes arranged in a circular pattern on the pedestal in a second radius, the second radius being greater than the first radius;
- and
- a plurality of grooves on the upper surface of the pedestal, the grooves including
- center grooves connecting between the center gas hole and the first set of gas holes, the grooves being curved grooves on the upper surface of the pedestal,
- first circular grooves connecting between the first set of gas holes, second circular grooves connecting between the second set of gas holes,
- linear grooves connecting between the first set of gas holes and the second set of gas holes, and
- curved grooves connecting the second set of gas holes to the first circular grooves connecting between the first set of gas holes,
- wherein at least one of the grooves connects only two adjacent gas holes.
9 more elements
Dependencies are inferred from the claim text.