Method and apparatus for monitoring etching
First Claim
1. A method of monitoring etching which comprises the steps of:
- regulating a gas pressure in a treating chamber, in which a sample is being etched by a dry etching process, to a pressure at which a emission line spectrum can be clarified;
Converting the gas having the pressure thereof regulated to plasma; and
monitoring the etching state of said sample from the change of the intensity of the emission line spectrum of the plasma with time.
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Accused Products
Abstract
This invention relates to a method and apparatus for monitoring etching. The monitor method comprises the steps of regulating a gas pressure inside a treating chamber, in which a sample is being etched by a dry etching process, to a pressure at which a emission line spectrum can be clarified, converting the gas whose pressure is regulated to plasma, and monitoring the etching state of the sample from the change of the intensity of the emission line spectrum with time. The monitor apparatus comprises exhaust means for discharging a gas from a treating chamber in which a sample is being etched by a dry etching process, plasma means for introducing the gas discharged from the treating chamber and converting it plasma, pressure regulation means for regulating the pressure of the gas at the plasma means to a pressure at which a emission line spectrum can be clarified, and spectrum detection means for detecting the emission line spectrum of the plasma at the plasma means, and detecting the change of the intensity of the detected emission line spectrum with time.
60 Citations
11 Claims
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1. A method of monitoring etching which comprises the steps of:
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regulating a gas pressure in a treating chamber, in which a sample is being etched by a dry etching process, to a pressure at which a emission line spectrum can be clarified; Converting the gas having the pressure thereof regulated to plasma; and monitoring the etching state of said sample from the change of the intensity of the emission line spectrum of the plasma with time. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for monitoring etching which comprises:
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exhaust means for discharging a gas from a treating chamber in which a sample is being etched by a dry etching process; plasma means for introducing said gas discharged from said treating chamber and converting it to plasma; pressure regulation means for regulating the pressure of said gas at said plasma means to a pressure at which a emission line spectrum can be clarified; and spectrum detection means for detecting the emission line spectrum of said plasma at said plasma means, and detecting the change of the intensity of said detected emission line spectrum with time. - View Dependent Claims (9, 10, 11)
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Specification