Patent ID: 8218097

Claim:
A liquid crystal display, comprising: a transistor disposed on a substrate; and a capacitor coupling with the transistor, wherein the capacitor is formed with a first conductive layer disposed on the substrate, an insulation layer disposed on the first conductive layer, a semiconductor layer disposed on the insulation layer with a area A sem and a second conductive layer disposed over the semiconductor; wherein the second conductive layer has a first region with a area A con overlapping with the semiconductor layer, and the area A con is less than the area A sem ; wherein the dielectric constant of the insulation layer is ε ins , the thickness of the insulation layer is d ins , the dielectric constant of the semiconductor layer is ε sem and the thickness of the semiconductor layer is d sem ; wherein, the capacitance of the capacitor is C, and the capacitance C is defined as follows: A con d ins ɛ ins + d sem ɛ sem ≤ C ≤ ɛ ins ⁢ A sem d ins .