Patent ID: 6077411
Filing Date: 2000-06-20
Classification: C25D,H01L,Y02E

Abstract:
An apparatus for forming a zinc oxide film on a sheet substrate, comprising:a tank adapted to contain an aqueous electrolytic solution containing at least nitrate ions and zinc ions,conveyer means for continuously feeding and conveying an elongated electroconductive sheet substrate having two major surfaces in a direction while dipping a lengthwise portion of the sheet substrate in the electrolytic solution,a counter electrode adapted to be immersed in the electrolytic solution so as to be opposite to the lengthwise portion of the sheet substrate, anda power supply disposed so as to pass a current between the sheet substrate and the counter electrode, whereinsaid conveyer means include a plurality of rollers and an endless belt wound about the rollers so as to form a conveying path for said sheet substrate and including a conveyer surface adapted for contacting and adapted for covering one of the major surfaces of the lengthwise portion of the sheet substrate to be dipped in the electrolytic solution while moving together with the sheet substrate, wherein the sheet substrate is substantially longer than the conveying path for said sheet substrate.