Patent ID: 8610120

Claim:
A display device comprising: a transistor including a gate electrode, a source electrode, a drain electrode, and a semiconductor layer; a first wiring electrically connected to the gate electrode; a second wiring electrically connected to one of the source electrode and the drain electrode; a pixel electrode electrically connected to the other of the source electrode and the drain electrode; a capacitor wiring; a first groove portion in the semiconductor layer; and a second groove portion in the semiconductor layer, wherein the semiconductor layer overlaps with the first wiring, the second wiring, the pixel electrode, and the capacitor wiring, wherein the first groove portion is formed over the first wiring to cross the first wiring in a line width direction of the first wiring, wherein the second groove portion is formed over the capacitor wiring to cross the capacitor wiring in a line width direction of the capacitor wiring, and wherein the second groove portion extends beyond edges of the pixel electrode in a direction parallel to a direction in which the second wiring extends.