Display device

A display device, comprising:

• a first thin film transistor including:
• a first active layer including a first channel region, a first source region and a first drain region, and the first active layer is formed of a first semiconductor material,
• a first gate electrode overlapping with the first active layer, and
• a first source electrode and a first drain electrode both electrically connected to the first active layer;
• a second thin film transistor including:
• a second source region formed as a plurality of layers and a second drain region formed as a plurality of layers,
• a second active layer including a second channel region formed as a single layer, the second active layer is formed of a second semiconductor material different from the first semiconductor material, and second active layer is electrically connected to second source region and the second drain region,
• a second gate electrode overlapped with the second channel region of the second active layer, and
• a second source electrode and a second drain electrode connected to the second source region and the second drain region of the second active layer, respectively;
• and
• a separation insulating layer disposed between the first thin film transistor and the second thin film transistor.