Patent ID: 6720273
Filing Date: 2004-04-13
Classification: C30B,H01J,H01L

Abstract:
A device for etching a patterned silicon body substrate with a plasma, comprising:a high-frequency generator; a plasma source for generating a high-frequency electromagnetic alternating field, a high frequency power to be applied to the plasma source with assistance of the high-frequency generator; a reactor for generating the plasma from reactive particles through an action of the high-frequency electromagnetic alternating field upon one of a reactive gas and a reactive gas mixture; and a first arrangement for producing a periodical change in the high-frequency power applied to the plasma source; wherein the first arrangement includes one of:a component for controlling a power of the high-frequency generator, a digital ramp generator being programed via a software in the component, and a component for controlling the power of the high-frequency generator including an analog ramp generator.