| 摘要 |
PROBLEM TO BE SOLVED: To prevent deposition of foreign matter on the treated object from being caused e.g. when a treated object is withdrawn from the treating liquid by discharging the foreign matter floating on the liquid surface of the treating liquid from a treatment vessel. SOLUTION: This treatment method using this treating device involves causing difference in surface tension within a liquid surface 13 of a treating liquid by a surface-tension nonuniformization means such as means for supplying a surface-active fluid 90 to the liquid surface 13, to effect a flow of the treating liquid due to the difference in surface tension and thereby to efficiently discharge floating foreign matter 80 from the treating device by a discharge means such as overflow section 17. As a result, the liquid surface 13 of the treating liquid, including a part of the liquid surface 13, which part is located above an object 200 being treated and conventionally liable to become stagnant, can always be maintained in a normal state and deposition of the foreign matter 80 on the treated object 200 can be prevented from being caused.
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