Method and apparatus for removing organic films
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United States of America Patent
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Feb 24, 2004
Grant Date -
Jun 12, 2003
app pub date -
Oct 21, 2002
filing date -
Oct 23, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and an apparatus for removing an organic film such as a resist film from a substrate surface are provided. These are very safe even at high temperatures, and use a treatment liquid which can be recycled and reused. A treatment liquid typically formed from liquid ethylene carbonate, propylene carbonate, or a liquid mixture of these two compounds, and in particular such a treatment liquid containing dissolved ozone, is contacted with a substrate with an organic film, and the organic film is removed. Furthermore, an apparatus of the present invention (A) a treatment liquid delivery device for transporting the treatment liquid to a treatment area, (B) a film contact device for bringing the treatment liquid into contacting with the organic film surface of the substrate within the treatment area, (C) a liquid circulation device for recycling treatment liquid discharged from the treatment area and returning the recycled liquid to the treatment area via one or more temporary storage devices, and (D) an ozone dissolution device for bringing ozone containing gas into contact with the treatment liquid either within the treatment area and/or within the temporary storage devices.
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