摘要:
A method for producing a nanotip from a tip material provides a substrate which consists of the tip material or has the material in the form of a coating, produces a mask from a mask material selected so that, in a predefined reactive ion etching process, the mask material is removed at a lower etching rate than the tip material, and carries out the reactive ion etching process in an etching chamber. The mask material is additionally selected so that a gaseous component is released therefrom during the reactive ion etching process, the gaseous component not being released from the tip material. The method further comprises detecting the gaseous component while the ion etching process is being carried out, repeatedly determining whether an amount of the gaseous component in the etching chamber reaches a predefined lower threshold, and stopping the reactive ion etching process when the lower threshold is reached.
摘要:
Systems and methods for impedance-based adjustment of power and frequency are described. A system includes a plasma chamber for containing plasma. The plasma chamber includes an electrode. The system includes a driver and amplifier coupled to the plasma chamber for providing a radio frequency (RF) signal to the electrode. The driver and amplifier is coupled to the plasma chamber via a transmission line. The system further includes a selector coupled to the driver and amplifier, a first auto frequency control (AFC) coupled to the selector, and a second AFC coupled to the selector. The selector is configured to select the first AFC or the second AFC based on values of current and voltage sensed on the transmission line.
摘要:
A method for controlling a gas supply to a process chamber is provided. The method includes: measuring a gas parameter by each of two or more sensors provided in the process chamber; determining a combined gas parameter from the measured gas parameters; and controlling the gas supply to the process chamber based on the determined combined gas parameter.
摘要:
A self-cleaning radio frequency (RF) plasma source for a semiconductor manufacturing process is described. Various examples provide an RF plasma source comprising an RF antenna and a rotatable dielectric sleeve disposed around the RF antenna. The dielectric is positioned between a process chamber and cleaning chamber such that portions of the surface of the dielectric may be exposed to either the process chamber or the cleaning chamber. As material is deposited on the outer surface of the dielectric in the process chamber, the dielectric sleeve is rotated so that the portion containing the buildup is exposed to the cleaning chamber. A sputtering process in the cleaning chamber removes the buildup from the surface of the sleeve. The dielectric sleeve is then rotated so that it exposed to the process chamber. Other embodiments are disclosed and claimed.
摘要:
A method of semiconductor processing comprises providing a semiconductor wafer in a processing chamber; feeding at least one tungsten-containing precursor in a gas state into the processing chamber for atomic layer deposition (ALD) of tungsten; feeding at least one reducing chemical in a gas state into the processing chamber; and monitoring a concentration of at least one gaseous byproduct in the chamber; and providing a signal indicating concentration of the at least one gaseous byproduct in the chamber. The byproduct is produced by a reaction between the at least one tungsten-containing precursor and the at least one reducing chemical during the ALD.
摘要:
A method for processing a substrate in a reactor by pulsing RF power, includes: applying RF power in pulses in the reactor to process the substrate; monitoring data from the reactor indicative of anomalous pulses of RF power, including data from a photo sensor equipped in the reactor; counting the number of anomalous pulses of RF power in the monitored data; determining whether or not the number of anomalous pulses of RF power is acceptable; and initiating a pre-designated sequence if the number of anomalous pulses of RF power is determined to be unacceptable.
摘要:
When a specimen from a specimen ionizing unit is not sufficiently ionized, is caused to remain in sites other than a pore in an introducing section and be deposited as a product such as an oxide or carbide, which causes a deterioration in the performance of the mass spectrometry device. The mass spectrometry device has a specimen ionizing section for ionizing a specimen, a specimen-introduction regulating chamber into which ions of the ionized specimen are introduced, a differential evacuation chamber located downstream of the specimen-introduction regulating chamber, and an analyzing section located at the downstream side of the differential evacuation chamber, in which a discharge generating means is formed for generating an electric discharge inside the specimen-introduction regulating chamber and/or the differential evacuation chamber. The discharge generating means has a specimen introducing section electrode and a first-pore-section-forming member located oppositely to each other inside the specimen-introduction regulating chamber.
摘要:
Systems and methods for impedance-based adjustment of power and frequency are described. A system includes a plasma chamber for containing plasma. The plasma chamber includes an electrode. The system includes a driver and amplifier coupled to the plasma chamber for providing a radio frequency (RF) signal to the electrode. The driver and amplifier is coupled to the plasma chamber via a transmission line. The system further includes a selector coupled to the driver and amplifier, a first auto frequency control (AFC) coupled to the selector, and a second AFC coupled to the selector. The selector is configured to select the first AFC or the second AFC based on values of current and voltage sensed on the transmission line.
摘要:
Plasma processing of plural substrates is performed in a plasma processing apparatus, which is provided with a plasma processing chamber having an antenna electrode and a lower electrode for placing and retaining the plural substrates in turn within the plasma processing chamber, a gas feeder for feeding processing gas into the processing chamber, a vacuum pump for discharging gas from the processing chamber via a vacuum valve, and a solenoid coil for forming a magnetic field within the processing chamber. At least one of the plural substrates is placed on the lower electrode, and the processing gas is fed into the processing chamber. RF power is fed to the antenna electrode via a matching network to produce a plasma within the processing chamber in which a magnetic field has been formed by the solenoid coil. This placing of at least one substrate and this feeding of the processing gas are then repeated until the plasma processing of all of the plural substrates is completed. An end of seasoning is determined when a parameter including an internal pressure of the processing chamber has become stable to a steady value with plasma processing time.
摘要:
Apparatus for chemically etching a workpiece includes a chamber for receiving a process gas and having a pumping port for extracting exhaust gases, and a workpiece support located in the chamber upstream of the pumping port. The chamber further includes a sub-chamber located upstream of the pumping port and downstream of the workpiece support, and the sub-chamber includes a window and an excitation source, adjacent the window, for creating a plasma in a sample of the exhaust gases to create an optical emission which can be monitored through the window.