Patent ID: 7719637

Claim:
A method for manufacturing an LCD (liquid crystal display device), the method comprising: forming a layer on a first substrate; forming a gate electrode, gate and data lines, a thin film transistor, a passivation layer and a pixel electrode on the first substrate; etching the layer to form an alignment mark; aligning a polarizing plate on the first substrate using the alignment mark and attaching the aligned polarizing plate to the first substrate; attaching the first substrate to a second substrate; providing liquid crystal to at least one of the first or second substrates, forming a black matrix on the second substrate; and forming red, green, and blue color filters on the second substrate, wherein the red, green, and blue color filters are formed on the second substrate after the black matrix is formed on the second substrate, wherein the alignment mark is formed of the same material as the gate electrode and the gate line, and wherein the alignment mark comprises an angle mark, an x-axis and a y-axis.