Patent ID: 6623183
Filing Date: 2003-09-23
Classification: G03D,Y10T

Abstract:
Developer producing equipment which is connected via piping to working equipment in which electronic circuits, on which fine working is performed, are formed, and which produces an alkali type developer used in said working equipment, said developer producing equipment comprising:a preparation tank to which a developer stock solution and pure water are supplied, and in which these ingredients are agitated so that said alkali type developer is prepared; first liquid amount measuring means for measuring the amount of said alkali type developer inside said preparation tank; first alkali concentration measuring means for measuring the alkali concentration of said alkali type developer inside said preparation tank; first liquid amount control means for adjusting the amount of said alkali type developer inside said preparation tank on the basis of a measured value obtained by said first liquid amount measuring means and a measured value obtained by said first alkali concentration measuring means; and liquid supply control means for adjusting at least either the amount of said developer stock solution or the amount of said pure water, supplied to said preparation tank, on the basis of the measured value obtained by said first liquid amount measuring means and the measure value obtained by said first alkali concentration measuring means.