Display device

A display device including a first transistor and a second transistor having channels of different semiconductor layers, and a capacitor, the display device comprising:

• a substrate;
• a first semiconductor pattern on the substrate and comprising a semiconductor layer of the first transistor;
• a first gate insulator on the substrate to cover the first semiconductor pattern;
• a first conductive layer on the first gate insulator and comprising a first gate electrode of the first transistor and a first electrode of the capacitor connected to the first gate electrode of the first transistor;
• a first interlayer dielectric on the first gate insulator to cover the first conductive layer;
• a second semiconductor pattern on the first interlayer dielectric and comprising a semiconductor layer of the second transistor and a second electrode of the capacitor;
• a second gate insulator on the first interlayer dielectric to cover an upper surface and a side surface of the second semiconductor pattern;
• a second conductive layer on the second gate insulator and comprising a gate electrode of the second transistor;
• and
• a third semiconductor pattern between the second semiconductor pattern and any one of the first conductive layer and the second conductive layer,
• wherein the second gate insulator is disposed between the second semiconductor pattern and the gate electrode of the second transistor, and contacts a top surface of the second electrode of the capacitor.