Abstract:
An apparatus for providing different gases to different zones of a processing chamber comprises a gas supply (1880) for providing an etching gas flow; a flow splitter (1831, 1836 - 1840) in fluid connection with the gas supply for splitting the etching gas flow from the gas supply into a plurality of legs (1812, 1814, 1833, 1834) and a tuning gas system (1860- 1862, 1865 - 1868) in fluid connection to at least one of the legs of the plurality of legs (1812, 1814).
Abstract:
A chamber liner for use in a semiconductor process chamber and a semiconductor process chamber containing the chamber liner are disclosed. The process chamber includes a housing having an inner surface defining a chamber in which a vacuum is drawn during processing of a semiconductor wafer. The chamber liner (116) has a plasma confinement shield (116c) with a plurality of apertures (116e). An outer sidewall (116b) extends upwardly from the plasma confinement shield (116c). An outer flange (116a) extends outwardly from the outer sidewall (116b) such that the outer flange (116a) extends beyond the chamber and into a space at atmospheric pressure. The chamber liner (116) preferably further includes an inner sidewall (116d) that extends upwardly from the plasma confinement shield (116c). The plasma confinement shield (116c), the inner and outer sidewalls (116d and 116b, respectively), and the outer flange (116a) are preferably integral with one another.
Abstract:
Methods of measuring gas flow rates in a gas supply system for supplying gas to a plasma processing chamber (12) are provided. In a differential flow method, a flow controller is operated at different set flow rates, and upstream orifice pressures are measured for the set flow rates at ambient conditions. The measured orifice pressures are referenced to a secondary flow verification method that generates corresponding actual gas flow rates for the different set flow rates. The upstream orifice pressures can be used as a differential comparison for subsequent orifice pressure measurements taken at any temperature condition of the chamber. In an absolute flow method, some parameters of a selected gas and orifice are predetermined, and other parameters of the gas are measured while the gas is being flowed from a flow controller at a set flow rate through an orifice.
Abstract:
An apparatus for providing different gases to different zones of a processing chamber comprises a gas supply (1880) for providing an etching gas flow; a flow splitter (1831, 1836 - 1840) in fluid connection with the gas supply for splitting the etching gas flow from the gas supply into a plurality of legs (1812, 1814, 1833, 1834) and a tuning gas system (1860- 1862, 1865 - 1868) in fluid connection to at least one of the legs of the plurality of legs (1812, 1814).
Abstract:
An apparatus for providing a gas from a gas supply to at least two different zones in a process chamber is provided. A flow divider provides a fluid connection to the gas supply, where the flow divider splits gas flow from the gas supply into a plurality of legs. A master leg is in fluid connection with the flow divider, where the master leg comprises a master fixed orifice. A first slave leg is in fluid connection with the flow divider and in parallel with the master leg, where the first slave leg comprises a first slave leg valve and a first slave leg fixed orifice.
Abstract:
A showerhead electrode assembly for a plasma processing apparatus is provided. The showerhead electrode assembly includes a first member attached to a second member. The first and second members have first and second gas passages in fluid communication. When a process gas is flowed through the gas passages, a total pressure drop is generated across the first and second gas passages. A fraction of the total pressure drop across the second gas passages is greater than a fraction of the total pressure drop across the first gas passages.Figure 3
Abstract:
METHOD OF MEASURING GAS FLOW RATES IN A GAS SUPPLY SYSTEM (100) FOR SUPPLYING GAS TO A PLASMA PROCESSING CHAMBER (12) ARE PROVIDED. IN A DIFFERENTIAL FLOW METHOD, A FLOW CONTROLLER IS OPERATED AT DIFFERENT SET FLOW RATES, AND UPSTREAM ORIFICE PRESSURES ARE MEASURED FOR THE SET FLOW RATES AT AMBIENT CONDITIONS. THE MEASURED ORIFICE PRESSURE ARE REFERENCED TO A SECONDARY FLOW VERIFICATION METHOD THAT GENERATES CORRESPONDING ACTUAL GAS FLOW RATES FOR THE DIFFERENT SET FLOW RATES. THE UPSTREAM ORIFICE PRESSURES CAN BE USED AS A DIFFERENTIAL COMPARISON FOR SUBSEQUENT ORIFICE PRESSURE MEASUREMENT TAKEN AT ANY TEMPERATURE CONDITION OF THE CHAMBER. IN AN ABSOLUTE FLOW METHOD, SOME PARAMETERS OF A SELECTED GAS AND ORIFICE ARE PREDETERMINED, AND OTHER PARAMETER OF THE GAS ARE MEASURED WHILE THE GAS IS BEING FLOWED FROM A FLOW CONTROLLER SET POINT CAN BE FLOWED AR ANY TIME AND AT ANY CHAMBER CONDITION, SUCH AS DURING PLASMA PROCESSING OPERATION. GAS SUPPLY SYSTEMS (100) ARE ALSO DISCLOSED.
Abstract:
An apparatus for providing a gas from a gas supply to at least two different zones in a process chamber is provided. A flow divider provides a fluid connection to the gas supply, where the flow divider splits gas flow from the gas supply into a plurality of legs. A master leg is in fluid connection with the flow divider, where the master leg comprises a master fixed orifice. A first slave leg is in fluid connection with the flow divider and in parallel with the master leg, where the first slave leg comprises a first slave leg valve and a first slave leg fixed orifice.
Abstract:
A chamber liner for use in a semiconductor process chamber and a semiconductor process chamber containing the chamber liner are disclosed. The process chamber includes a housing having an inner surface defining a chamber in which a vacuum is drawn during processing of a semiconductor wafer. The chamber liner has a plasma confinement shield with a plurality of apertures. An outer sidewall extends upwardly from the plasma confinement shield. An outer flange extends outwardly from the outer sidewall such that the outer flange extends beyond the chamber and into a space at atmospheric pressure. The chamber liner preferably further includes an inner sidewall that extends upwardly from the plasma confinement shield. The plasma confinement shield, the inner and outer sidewalls, and the outer flange are preferably integral with one another.