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Cryopump control apparatus, cryopump system, and method for monitoring cryopump

  • US 8,800,304 B2
  • Filed: 06/13/2012
  • Issued: 08/12/2014
  • Est. Priority Date: 06/14/2011
  • Status: Active Grant
First Claim
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1. A cryopump control apparatus controlling a cryopump that comprises a cryopanel which cools and thus condenses or adsorbs gas, and a pump housing which contains the cryopanel, whereina regeneration process of the cryopump includes:

  • a basic purge process that includes one or more gas purge steps;

    one or more evacuation processes that first evacuate the pump housing down to a vacuum retention evaluation level and evaluate a vacuum retention state; and

    an optional purge process that includes one or more gas purge steps executed once or more than once if necessary, andthe cryopump control apparatus comprisesa deterioration evaluation unit operative to determine whether a re-purge number, which is the total number of one or more gas purge steps included in one or more optional purge processes that is required to be executed in one regeneration process, reaches a deterioration evaluation criteria number.

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