Display substrate and method of manufacturing a motherboard for the same

A method of manufacturing a motherboard for a display substrate, the method comprising:

• forming an array layer including a signal line formed on a display area of each of array regions of a base motherboard, a test signal line formed in a peripheral area of each of the array regions and electrically connected to the signal line, and a test switching element electrically connected to the test signal line;
• forming a transparent electrode layer on the base motherboard having the array layer formed thereon;
• and
• patterning the transparent electrode layer to form a transparent electrode pattern including an electrical shorting bar formed between adjacent array regions, a test pad electrode connected to the test signal line and a first electrostatic dispersion line connecting the test pad electrode to the electrical shorting bar.