Voltage-current probe for measuring radio-frequency electrical power in a high-temperature environment and method of calibrating the same

摘要

A voltage-current sensor enables more accurate measurement of the voltage, current, and phase of RF power that is delivered to high-temperature processing region. The sensor includes a planar body comprised of a non-organic, electrically insulative material, a measurement opening formed in the planar body, a voltage pickup disposed around the measurement opening, and a current pickup disposed around the measurement opening. Because of the planar configuration and material composition of the sensor, the sensor can be disposed proximate to or in contact with a high-temperature surface of a plasma processing chamber.