Patent ID: 8351015

Claim:
A method for testing a liquid crystal display panel comprising the steps of: forming gate lines and at least one testing signal supply line having first and second horizontal portions spaced from each other for applying a testing signal to the liquid crystal display panel, and first and second electrolytic corrosion blocking patterns connected to ends of the first and second horizontal lines respectively on a substrate; testing shorts of the gate lines; forming a gate insulating film on the testing line and the first and second electrolytic corrosion blocking patterns; forming a protective film having first and second contact holes which expose the first and second horizontal portions and a third contact hole which exposes the electrolytic corrosion blocking pattern; dividing a connection pattern formed of a material resistant to the electrolytic corrosion for connecting the first horizontal portion to the second horizontal portion through the first and second contact holes, and the first and second electrolytic corrosion blocking patterns by the third contact hole; inspecting defects in an array by applying a test signal to the at least one testing line; and removing the at least one testing line by scribing.