Method for manufacturing color filter

A method for manufacturing a color filter, which comprises the steps of:

• (a) preparing a substrate in a tetragonal form, which carries an electroconductive transparent thin layer on its surface,
• (b) holding the substrate prepared in step (a) which functions as an electrode and an electroconductor which functions as a counter electrode in an electrodeposition bath in such a way that they are spaced apart and in parallel to each other, the substrate being suspended in an inclined state in a manner such that one of the apexes of the tetragonal substrate is located lower than any of its other apexes by holding an apex opposite to the said lower-located apex with a holding means, so that two sides adjacent to the said lower-located apex are inclined relative to the vertical line,
• (c) effecting electrodeposition by applying a given voltage to the electrodes which results in an electric current, and
• (d) removing the substrate obtained in step (c) from the electrodeposition bath, while maintaining the inclined state of step (b).