Abstract:
Methods and gas flow control assemblies configured to deliver gas to process chamber zones in desired flow ratios. In some embodiments, assemblies include one or more MFCs and a back pressure controller (BPC). Assemblies includes a controller, a process gas supply, a distribution manifold, a pressure sensor coupled to the distribution manifold and configured to sense back pressure of the distribution manifold, a process chamber, a one or more mass flow controllers connected between the distribution manifold and process chamber to control gas flow there between, and a back pressure controller provided in fluid parallel relationship to the one or more mass flow controllers, wherein precise flow ratio control is achieved. Alternate embodiments include an upstream pressure controller configured to control flow of carrier gas to control back pressure. Further methods and assemblies for controlling zonal gas flow ratios are described, as are other aspects.
Abstract:
Mass flow verification systems and apparatus may verify mass flow rates of mass flow controllers (MFCs) based on choked flow principles. These systems and apparatus may include a plurality of differently-sized flow restrictors coupled in parallel. A wide range of flow rates may be verified via selection of a flow path through one of the flow restrictors based on an MFC's set point. Mass flow rates may be determined via pressure and temperature measurements upstream of the flow restrictors under choked flow conditions. Methods of verifying a mass flow rate based on choked flow principles are also provided, as are other aspects.
Abstract:
Apparatus for processing a substrate are described herein, More specifically, embodiments described herein relate to separate pre-clean process modules and pre-clean control modules coupled to a cluster tool assembly. Each pre-clean process module and each pre-clean control module are connected by a cable conduit which is configured to have power and control cables passing therethrough between the pre-clean process module and the ore-clean control module. A maintenance passage is formed through the cluster tool assembly. Each of a purge gas source, a process gas source, a manometer, an isolation port, and a throttle valve are all accessible from one side of the pre-clean process module.
Abstract:
Methods and gas flow control assemblies configured to deliver gas to process chamber zones in desired flow ratios. In some embodiments, assemblies include one or more MFCs and a back pressure controller (BPC). Assemblies includes a controller, a process gas supply, a distribution manifold, a pressure sensor coupled to the distribution manifold and configured to sense back pressure of the distribution manifold, a process chamber, a one or more mass flow controllers connected between the distribution manifold and process chamber to control gas flow there between, and a back pressure controller provided in fluid parallel relationship to the one or more mass flow controllers, wherein precise flow ratio control is achieved. Alternate embodiments include an upstream pressure controller configured to control flow of carrier gas to control back pressure. Further methods and assemblies for controlling zonal gas flow ratios are described, as are other aspects.
Abstract:
Methods and apparatus for delivering a gas mixture to a process chamber are provided herein. In some embodiments, a precursor delivery apparatus may include an ampoule having a body with a first volume to hold a liquid precursor, an inlet to receive the liquid precursor and a carrier gas, and an outlet to flow a gas mixture of the liquid precursor and the carrier gas from the ampoule; a first heater disposed proximate to or in the first volume to heat the liquid precursor disposed in the first volume proximate to or at a first location within the first volume where the liquid precursor contacts the carrier gas; and a heat transfer apparatus disposed about the body to at least one of provide heat to or remove heat from the ampoule.