Method of utilizing dual-layer photoresist to form black matrixes and spacers on a control circuit substrate

A method of utilizing dual-layer photoresist to form black matrixes and spacers on a control circuit substrate, the control circuit substrate having a control circuit made of control devices having a passivation layer formed thereon, and the passivation layer having contact windows to expose electrodes of the control devices respectively, comprising:

• forming a color filter layer on the control circuit substrate;
• forming pixel electrodes on the color filter layer, each pixel electrode electrically connecting to the electrode of each of the control devices through each of the contact windows;
• forming a black resin on the control circuit substrate to overlap the contact windows in the passivation layer;
• performing a first soft baking step to soft-bake the black resin;
• forming a transparent photoresist on the black resin, wherein an exposure dose of the transparent photoresist is about 19 mj/cm2;
• performing a second soft baking step to soft-bake the transparent photoresist;
• patterning the transparent photoresist and the black resin to form spacers respectively on opaque areas of the control circuit by only one photomask;
• and
• hard baking the transparent photoresist and the black resin.