Method of calibrating and using a semiconductor processing system
AssigneeApplied Materials, Inc.
InventorsJean R. Vatus, David K. Carlson, Arkadii V. Samoilov, Lance A. Scudder, Paul B. Comita, Annie A. Karpati
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Abstract
A method is provided wherein a temperature reading error of a pyrometer is avoided. An upper pyrometer is used to detect infrared radiation from a test layer formed on a test substrate under standard processing conditions. The infrared radiation from the test layer has a period having a length which is indicative of growth rate of the layer. The period is generally inversely proportional to the growth rate. The growth rate is directly related to the temperature.
Claims25
A method, comprising:
- measuring a test variable of a test layer formed on a test substrate in a processing chamber;
- using the test variable to select a reference process condition in a consolidated data set of reference variables against reference process variables, a location of the reference process condition among the reference process variables depending on a location of the test variable among the reference variables;
- and
- forming a process layer on a process substrate in a processing chamber, a process variable to form the process layer being based on the reference process condition.
A computer-implemented method, comprising:
- measuring a test variable of a test layer formed on a test substrate in a processing chamber;
- using the test variable to select a reference process condition in a consolidated data set of reference variables against reference process variables, a location of the reference process condition among the reference process variables depending on a location of the test variable among the reference variables;
- and
- forming a process layer on a process substrate in a processing chamber, a process variable to form the process layer being based on the reference process condition.
A method, comprising:
- setting a heater to create a test heat flux over a test substrate in a substrate processing chamber;
- forming a test layer on the surface while the heater creates the test heat flux over the surface of the test substrate;
- comparing a test variable indicative of growth rate of the test layer with a reference variable indicative of growth rate of a reference layer when a reference heat flux is created over a surface of a reference substrate;
- inserting a process substrate into the processing chamber;
- setting the heater to create a process heat flux over a surface of the process substrate, the process heat flux being selected based upon the comparison of the test variable with the reference variable;
- forming a process layer on the surface of the process substrate while the heater creates the process heat flux over the surface of the process substrate;
- and
- removing the process substrate from the processing chamber after the process layer is formed.
A method comprising:
- setting a heater to create a test heat flux over a surface of a test substrate in a processing chamber;
- forming a test layer on the surface of the test substrate while the heater creates the test heat flux over the surface of the test substrate;
- utilizing a pyrometer to detect infrared radiation from the test layer while the test layer is being formed, the pyrometer generating a signal varying with variations in magnitude of the infrared radiation;
- calculating a test value indicative of a length of a period of the signal;
- selecting a desired process value from data of different reference process values;
- accessing a desired reference value from the data corresponding to the desired process value and differing from reference values corresponding to other ones of the process values;
- comparing the test value with the desired reference value;
- adjusting the heater based upon said comparison;
- inserting a process substrate into the processing chamber, the heater heating the process substrate after said adjustment;
- forming a process layer on the process substrate while being heated by the heater;
- and
- removing the process substrate from the processing chamber into which the process substrate is inserted.
A method, comprising:
- using a temperature detector to detect a variable other than temperature of a test layer formed on a test substrate in a processing chamber;
- and
- forming a process layer on a process substrate in a processing chamber, at least one processing condition to form the process layer being set based on the variable.
Dependencies are inferred from the claim text.