Mass flow verification based on rate of pressure decay

    公开(公告)号:US11604089B2

    公开(公告)日:2023-03-14

    申请号:US17247091

    申请日:2020-11-30

    Abstract: An electronic device manufacturing system includes: a gas supply; a mass flow controller (MFC) coupled to the gas supply; an inlet coupled to the MFC; an outlet; a control volume serially coupled to the inlet to receive a gas flow; and a flow restrictor serially coupled to the control volume and the outlet. A controller is adapted to allow the gas supply to flow gas through the control volume and the flow restrictor to achieve a stable pressure in the control volume, terminate the gas flow from the gas supply, and measure a rate of pressure decay in the control volume over time. A process chamber is coupled to a flow path, which is coupled to the mass flow controller, the process chamber to receive one or more process chemistries via the mass flow controller.

    In-situ temperature mapping for epi chamber

    公开(公告)号:US11261538B1

    公开(公告)日:2022-03-01

    申请号:US17027385

    申请日:2020-09-21

    Abstract: The present invention provides methods and apparatus for processing semiconductor substrates in an epitaxy chamber configured to map a temperature profile for both substrates and interior chamber components. In one embodiment, the semiconductor processing chamber has a body having ceiling and a lower portion defining an interior volume. A substrate support is disposed in the interior volume. A mounting plate is coupled to the ceiling outside the interior volume. A movement assembly is coupled to the mounting plate. A sensor is coupled to the movement assembly and moveable relative to the ceiling. The sensor is configured to detect a temperature location in the interior volume.

    Methods and assemblies for gas flow ratio control

    公开(公告)号:US10453721B2

    公开(公告)日:2019-10-22

    申请号:US15070342

    申请日:2016-03-15

    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.

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