Display device including a base film and method of manufacturing display device

A display device, comprising:

• a display panel configured to display an image;
• a circuit board coupled to the display panel;
• and
• a metal pattern electrically connecting the display panel and the circuit board to each other,
• wherein the display panel includes:
• a base layer including a pad electrode that is exposed through an opening;
• and
• a circuit layer disposed on the base layer and including at least one signal line electrically connected to the pad electrode,
• wherein the circuit board includes:
• a base film including a first part having a first thickness and a second part having a second thickness that is greater than the first thickness;
• and
• a bump electrode disposed on the first part,
• wherein the first part is disposed between the pad electrode and the bump electrode, and
• wherein the metal pattern is disposed on the pad electrode and the bump electrode and electrically connects the pad electrode and the bump electrode to each other.