Patent ID: 7354781

Claim:
A method of forming stacked layers in an electronic device, comprising: preparing a multi-layer structure comprising a substrate, a cathode on the substrate, a gate electrode having a through-hole, and a gate insulation layer disposed between the cathode and the gate electrode and having a gate hole corresponding to the through-hole; forming a sacrificial layer by coating a positive photoresist having polymers on the multi-layer structure, the polymers comprising at least 50 mole % of monomers having structures selected from the group consisting of Formulae 1 through 3; forming a photomask on a position of the sacrificial layer corresponding to the gate hole; exposing a portion of the sacrificial layer uncovered by the photomask to light; forming a well in the sacrificial layer by etching the unexposed portion of the sacrificial layer covered by the photomask using one of TCE and CH 2 Cl 2 solvents; filling the well by applying an electron emitting material paste which is able to be hardened by light to the sacrificial layer; hardening a lower portion of the electron emitting material paste filled in the well by radiating light from the bottom of the substrate; and forming an electron emitting material layer having a predetermined height on the cathode by removing the sacrificial layer and the unexposed electron emitting material paste: where R 1 is hydrogen or an alkyl group having 1 to 6 linear or cyclic carbon atoms, R 2 is an alkyl group having 1 to 6 linear or cyclic carbon atoms, and R 3 is hydrogen or an alkyl group having 1 to 6 linear or cyclic carbon atoms; where R 1 is hydrogen or an alkyl group having 1 to 6 linear or cyclic carbon atoms, R 2 is an alkyl group having 1 to 6 linear or cyclic carbon atoms, and R 3 and R 4 are independently hydrogen or an alkyl group having 1 to 6 linear or cyclic carbon atoms, and the joining of R 1 and R 2 , or R 1 and either R 3 or R 4 , or R 2 and either R 3 or R 4 forms a 5-, 6-, or 7-membered ring, where R 1 is hydrogen or an alkyl group having 1 to 6 linear or cyclic carbon atoms, R 2 is an alkyl group having 1 to 6 linear or cyclic carbon atoms, and R 3 and R 4 are independently hydrogen or an alkyl group having 1 to 6 linear or cyclic carbon atoms, and the joining of R 1 and R 2 , or R 1 and either R 3 or R 4 , or R 2 and either R 3 or R 4 forms a 5-, 6-, or 7-membered ring.