Developer producing equipment and method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Sep 23, 2003
Grant Date -
Oct 10, 2002
app pub date -
Feb 6, 2002
filing date -
Feb 6, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The developer producing equipment of the present invention is connected via piping to working equipment in which electronic circuits, on which fine working is performed, are formed, and produces an alkali type developer used in the abovementioned working equipment. This developer producing equipment comprises a preparation tank to which a developer stock solution and pure water are supplied, and in which these are agitated, first liquid amount measuring means for measuring the amount of the alkali type developer inside the preparation tank, first alkali concentration measuring means for measuring the alkali concentration of the abovementioned alkali type developer, first liquid amount control means for adjusting the amount of the alkali type developer inside the preparation tank on the basis of the measured value obtained by the abovementioned first liquid amount measuring means the abovementioned first alkali concentration measuring means, and liquid supply control means.
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