Display device and method of manufacturing the same

A method of manufacturing a display device comprising:

• forming a base metal layer including a first base metal layer and a second base metal layer on a substrate;
• forming a thin film transistor on the substrate at a position overlapping the first base metal layer and forming a capacitor on the substrate at a position overlapping the second base metal layer in a plan view;
• and
• forming a light-emitting element electrically connected to the thin film transistor, wherein
• the forming of the base metal layer includes:
• a primary etching of sequentially laminating a first layer including aluminum and a second layer including titanium on the substrate and etching the first layer and the second layer;
• and
• a secondary etching of selectively etching the second layer,
• an end of the second layer is formed to be recessed inward more than an end of the first layer and positioned on an upper surface of the first layer, and
• a protective layer including aluminum and titanium is formed on a side surface of the first layer.

An electronic device comprising:

• a processor that provides image data;
• a display device that displays an image based on the image data;
• a memory that stores the image data;
• and
• a power module that provides a power to the processor and the display device, wherein
• the display device comprises:
• a thin film transistor positioned on a substrate and including a driving transistor;
• a capacitor electrically connected to the driving transistor;
• a light-emitting element electrically connected to the driving transistor;
• and
• a base metal layer positioned between the substrate and the driving transistor and between the substrate and the capacitor,
• the base metal layer includes a first layer and a second layer sequentially laminated on the substrate,
• an end of the second layer is recessed inward from an end of the first layer and is positioned on an upper surface of the first layer, and
• a protective layer including atoms of the first layer is positioned on a side surface of the first layer.