Display apparatus having a first insulating layer including first portion and second portion

A display apparatus comprising:

• a thin-film transistor including a semiconductor layer and a gate electrode, wherein the semiconductor layer includes a channel region, a source region, and a drain region, the source region and the drain region disposed on two opposite sides of the channel region, and the gate electrode overlapping the channel region;
• a lower electrode disposed under the semiconductor layer;
• a capacitor electrically connected to the thin-film transistor and including a first capacitor electrode and a second capacitor electrode disposed over the first capacitor electrode, the first capacitor electrode disposed on a same layer as the lower electrode;
• and
• a first insulating layer including a first portion and a second portion, the first portion disposed between the lower electrode and the semiconductor layer, and the second portion disposed between the first capacitor electrode and the second capacitor electrode,
• wherein a thickness of the second portion of the first insulating layer is less than a thickness of the first portion of the first insulating layer.