Method for forming color filter

A method of forming a color filter over a substrate having a display region and a peripheral region surrounding the display region, wherein the substrate has a passivasion layer formed thereon and the passivasion layer has at least one trench formed therein within the peripheral region, the method comprising:

• forming a first color filter layer over the passivasion layer to fill the trench;
• patterning the first color filter layer so as to form a plurality of first color filter blocks in the display region and to expose a portion of the passivasion layer;
• forming a second color filter layer over the passivasion layer;
• patterning the second color filter layer to form a plurality of second color filter blocks between the first color filter blocks respectively;
• forming a third color filter layer over the passivasion layer;
• and
• patterning the third color filter layer to form a plurality of third color filter blocks between the first color filter blocks and the second color filter blocks respectively.