Cleaning a component of a process chamber
First Claim
1. A method of cleaning process deposits from a component of a process chamber, the component having a plurality of gas holes, the method comprising:
- (a) mechanically pinning the gas holes of the component to clean the process deposits in the gas holes;
(b) exposing the component to an acidic solution; and
(c) plasma stabilizing the component by;
(1) placing the component into a plasma zone;
(2) introducing a gas into the plasma zone;
(3) forming a plasma of the gas in the plasma zone; and
(4) exhausting the gas from the plasma zone.
1 Assignment
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Accused Products
Abstract
Process deposits formed on a component of a process chamber are cleaned. In the cleaning method, gas holes in the component are mechanically pinned to clean the process deposits therein. A ceramic portion of the component is then exposed to an acidic solution, such as a solution of hydrofluoric acid and nitric acid. Mechanical pinning of the gas holes may be repeated after the acid cleaning step. The component is then plasma stabilized in a plasma zone by introducing a non-reactive gas into the plasma zone and forming a plasma of the non-reactive gas in the plasma zone. In one version, the component comprises an electrostatic chuck comprising a ceramic covering an electrode and having the gas holes therein.
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Citations
17 Claims
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1. A method of cleaning process deposits from a component of a process chamber, the component having a plurality of gas holes, the method comprising:
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(a) mechanically pinning the gas holes of the component to clean the process deposits in the gas holes;
(b) exposing the component to an acidic solution; and
(c) plasma stabilizing the component by;
(1) placing the component into a plasma zone;
(2) introducing a gas into the plasma zone;
(3) forming a plasma of the gas in the plasma zone; and
(4) exhausting the gas from the plasma zone. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of cleaning process deposits from an electrostatic chuck, the electrostatic chuck having a plurality of gas holes and comprising a ceramic covering an electrode, and the method comprising:
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(a) mechanically pinning the gas holes in the electrostatic chuck to clean the process deposits in the gas holes;
(b) exposing the ceramic to an acidic solution comprising hydrofluoric acid and nitric acid;
(c) repeating (a) after (b);
(d) testing the electrical resistance of the ceramic;
(e) plasma stabilizing the electrostatic chuck by;
(1) placing the electrostatic chuck into a plasma zone;
(2) introducing a non-reactive gas into the plasma zone;
(3) forming a plasma of the non-reactive gas in the plasma zone; and
(4) exhausting the non-reactive gas from the plasma zone. - View Dependent Claims (9, 10, 11)
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12. A pinning tool for cleaning process deposits from a plurality of gas holes of a component of a process chamber, the pinning tool comprising:
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(a) a housing; and
(b) a plurality of elongated pins protruding from the housing, the elongated pins being spaced apart to match a layout of the gas holes in the component of the process chamber. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification