Patent ID: 7534155

Claim:
A method of manufacturing a display panel, the method comprising: providing a supporting bed, the supporting bed including a first supporting bed and a second supporting bed positioned on the first supporting bed, the first supporting bed having a first thermal expansion coefficient, the second supporting bed having a second thermal expansion coefficient and the second supporting bed having a first surface with a perimeter; forming a material layer on a substrate, the substrate having a third expansion coefficient and a second surface; positioning the substrate on the second supporting bed such that the second surface of the substrate touches the first surface of the second supporting bed and the second surface of the substrate is positioned entirely within the perimeter of the first surface of the second supporting bed; and heating and baking the material layer formed on the substrate while maintaining the position of the second surface of the substrate entirely within the perimeter of the first surface of the second supporting bed; wherein a difference between the third thermal expansion coefficient and the first thermal expansion coefficient is smaller than a difference between the second thermal expansion coefficient and the first thermal expansion coefficient.