Thin film transistor and display device including the same

A thin film transistor (TFT), comprising:

• a gate electrode;
• a gate insulating layer disposed on the gate electrode;
• a semiconductor layer disposed on the gate insulating layer;
• a source electrode and a drain electrode disposed on the semiconductor layer while being spaced apart from one another;
• and
• a protective layer disposed on the source electrode and the drain electrode and having a contact hole through which a portion of the drain electrode is exposed,
• wherein the drain electrode comprises:
• a first portion of the drain electrode overlapping a portion of the gate electrode,
• a second portion of the drain electrode extending from the first portion of the drain electrode, comprising an outer circumference in plan view, and comprising a portion exposed through the contact hole, and
• a third portion of the drain electrode branched from the first portion of the drain electrode and spaced apart from the outer circumference of the second portion of the drain electrode,
• wherein the first portion of the drain electrode and the third portion of drain electrode form a closed ring shape in a plan view that surrounds the second portion of the drain electrode.