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    • 1. 发明专利
    • SUBSTRATE TREATING APPARATUS
    • JP2000195796A
    • 2000-07-14
    • JP37265398
    • 1998-12-28
    • KOKUSAI ELECTRIC CO LTD
    • TAKADA MASATOSHIIMAI YOSHINORIYAMAGUCHI NOBUAKI
    • H01L21/205
    • PROBLEM TO BE SOLVED: To easily and surely reduce the unwanted substance concn. by controlling evacuating means and gas purging means so as to repeat the vacuum evacuation and the atmospheric pressure recovery in the apparatus until a concn. measuring means provides a specified measured value or less. SOLUTION: A main controller 50 opens a fourth valve, a fourth oxygen concn. meter 41 measures the oxygen concn. in a first reactor chamber and sends measured value data to the main controller 50 after a time lapsed, an operation recipe control unit of the main controller 50 compares the measured value with a value of oxygen concn. preset in the operation recipe control unit through a main operating unit 51, the main controller 50 sends vacuum evacuation and atmospheric pressure recovery control continuing signals again to a sequencer 53 when the measured value exceeds the preset value of oxygen concn., the sequencer 53 opens an exhaust valve and again evacuates the first reactor chamber through a fourth exhaust pipe, and the vacuum evacuation and the atmospheric pressure recovery steps are repeated until the measured oxygen concn. value in the first reactor chamber is a specified value or less.