Display device including a conductive line disposed on an insulating layer groove and a method of manufacturing the same

A method of manufacturing a display device, comprising:

• forming a first conductive line on a substrate;
• forming a first insulating layer at least partially covering the first conductive line;
• forming a contact hole exposing the first conductive line in the first insulating layer by using a halftone mask;
• forming a groove in the first insulating layer by using the halftone mask, the groove is recessed in a direction towards the substrate and has a depth smaller than a depth of the contact hole;
• and
• forming a second conductive line at least partially filling the contact hole and the groove.

A method of manufacturing a display device, the method comprising:

• forming a first conductive line on a substrate;
• forming a first insulating layer at least partially covering the first conductive line;
• forming a contact hole exposing the first conductive line in the first insulating layer by using a first mask;
• forming a groove in the first insulating layer by using a second mask, the groove is recessed in a direction towards the substrate and has a depth smaller than a depth of the contact hole;
• forming a second conductive line at least partially filling the contact hole and the groove;
• and
• forming a second insulating layer at least partially covering the second conductive line.