Patent ID: 7828487

Claim:
A post-exposure baking apparatus comprising: a supporting member configured to receive and seat a wafer having a central portion and a surrounding outer edge portion and having a photoresist layer formed thereon; a heating member comprising heating wires integrally formed within the supporting member, regularly disposed under only the central portion of the wafer, and configured to heat the wafer to chemically amplify an acid generated in only a portion of the photoresist layer overlaying the central portion of the wafer; and a cooling member mechanically separate from the supporting member and comprising a wafer cooling line configured around the perimeter of the supporting member, such that a cooling liquid circulating through the wafer cooling line selectively cools only the outer edge portion of the wafer to suppress the amplification of the acid in a portion of the photoresist layer overlaying the outer edge portion of the wafer while the heating member chemically amplifies the acid in the portion of the photoresist layer overlaying the central portion of the wafer.