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EXHAUST METHOD OF HEAT TREATMENT APPARATUS

  • US 20190035645A1
  • Filed: 06/13/2018
  • Published: 01/31/2019
  • Est. Priority Date: 07/27/2017
  • Status: Active Grant
First Claim
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1. An exhaust method of a heat treatment apparatus that applies heating treatment to a substrate in a chamber, the exhaust method comprising the steps of:

  • (a) supplying a predetermined treatment gas into said chamber housing a substrate to apply heating treatment to said substrate while a vacuum pump exhausts gas from said chamber at a first exhaust flow rate;

    (b) stopping supply of said treatment gas into said chamber and exhaust from said chamber when cracking of said substrate during the heating treatment in said chamber is detected;

    (c) reducing pressure in said chamber after said step (b) by exhausting gas from said chamber at a second exhaust flow rate smaller than said first exhaust flow rate by using said vacuum pump; and

    (d) supplying an inert gas into said chamber to restore the pressure in said chamber to atmospheric pressure after the pressure in said chamber is reduced to a predetermined pressure.

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