Display device

A display device comprising

• a substrate and
• a transistor on the substrate,
• wherein the transistor includes:
• a lower layer having conductivity and including a body portion and a plurality of protrusions;
• an oxide semiconductor layer including a channel region, a first conductive region disposed at a first side of the channel region, and a second conductive region disposed at a second side of the channel region, wherein the second side is opposite the first side;
• a gate electrode overlapping the channel region in a plan view;
• a first electrode electrically connected to the first conductive region;
• and
• a second electrode electrically connected to the second conductive region,
• wherein the plurality of protrusions protrudes from an overlapped region where the body portion and the channel region overlap each other,
• wherein the plurality of protrusions include a plurality of first protrusions extending in a first direction and a plurality of second protrusions extending in a direction opposite to the first direction.