Method for producing color filter wherein the voltage used to electrodeposit the colored layers is decreased with each subsequent electrodeposition step

A method for producing a color filter comprising the steps of:

• (A) forming a photosensitive coating film on at least a transparent electrically conductive layer formed on an outermost surface of a transparent substrate and exposing said photosensitive coating film through a mask having patterns of at least three different degrees of light transmittance, said mask being selected from the group consisting of a negative mask when said photosensitive coating film is a negative film and a positive mask when said photosensitive coating film is a positive film;
• (B) developing and removing a photosensitive coating film region corresponding to a pattern selected from the group consisting of a pattern having the smallest degree of light transmittance when said mask is a negative mask and when said photosensitive coating film is a negative film and a pattern having the largest degree of light transmittance when said mask is a positive mask and when said photosensitive coating film is a positive film for exposing said transparent electrically conductive layer and electrodepositing a colored coating on the exposed transparent electrically conductive layer for forming a colored layer thereon, the operation of developing and removing the photosensitive coating film and electrodepositing the colored coating being sequentially repeated for the respective patterns having different degrees of light transmittance where said sequence of repetition is selected from the group consisting of increasing light transmittance when said mask is a negative mask and when said photosensitive coating film is a negative film and decreasing light transmittance when said mask is a positive mask and when said photosensitive coating film is a positive film to form different colored layers, respectively, said electrodepositing being in turn performed each time at a decreasing voltage.