Color filter-on-array substrate, display device, and method for manufacturing the color filter-on-array substrate

A method for manufacturing a color filter-on-array (COA) substrate, comprising steps of forming a gate line and a first conductive layer pattern comprising a data line, a source electrode, and a drain electrode of a thin film transistor (TFT), wherein the method further comprises steps of:

• forming a passivation layer pattern on the first conductive layer pattern, the passivation layer pattern comprising a first via-hole at a position corresponding to the drain electrode;
• forming a second conductive layer pattern on the passivation layer pattern, the second conductive layer pattern comprising a conductive connection pattern arranged at a light-shielding region and connected to the drain electrode of the TFT through the via-hole, the light-shielding region being defined by the gate line, the data line, and the TFT, and a whole projection of the conductive connection pattern on a base substrate of the COA substrate is located within a projection of the light-shielding region on the base substrate;
• and
• forming a color filter layer pattern on the second conductive layer pattern, the color filter layer pattern comprising a second via-hole at a position corresponding to the conductive connection pattern.

A color filter-on-array (COA) substrate, comprising a gate line and a data line crossing each other, and a thin film transistor (TFT), wherein the COA substrate further comprises:

• a passivation layer pattern arranged on a first conductive layer pattern comprising the data line, a source electrode, and a drain electrode of the TFT, and the passivation layer pattern comprising a first via-hole at a position corresponding to the drain electrode;
• a second conductive layer pattern arranged on the passivation layer pattern and comprising a conductive connection pattern arranged at a light-shielding region and connected to the drain electrode of the TFT through the via-hole, the light-shielding region being defined by the gate line, the data line and the TFT;
• a color filter layer pattern arranged on the second conductive layer pattern and comprising a second via-hole at a position corresponding to the conductive connection pattern;
• and
• a black matrix arranged between the passivation layer pattern and the second conductive layer pattern, and at a position within the light-shielding region apart from a position where the first via-hole is located,
• wherein a whole projection of the conductive connection pattern on a base substrate of the COA substrate is located within projections of the TFT and the black matrix on the base substrate.