Patent ID: 8300301

Claim:
A method of manufacturing a substrate, the method comprising: disposing a preliminary planarization layer on a first surface of a plastic substrate; bonding a second surface of the plastic substrate onto a carrier substrate, wherein the second surface of the plastic substrate is substantially opposite to the first surface; curing the preliminary planarization layer to form a planarization layer; and separating the carrier substrate from the plastic substrate, wherein the planarization layer comprises a first protruding portion disposed corresponding to a shape of a foreign substance and aligned with a position at which the foreign substance is covered when the foreign substance is located on the plastic substrate, wherein the first protruding portion has a height of about 1,000 angstroms or less and a width of about 1.2 millimeters or less, and wherein the first protruding portion comprises second protruding portions arranged on a surface of the first protruding portion, and the second protruding portions have a maximum height of about 80 nanometers measured from a flat surface of the planarization layer and have an average width of about 5 nanometers or less.