Patent ID: 7819717

Claim:
A process for producing an emissive device including: a first region where a first emissive layer is formed, the first emissive layer composed of a first material that emits light of a first color, a second region where a second emissive layer is formed, the second emissive layer composed of a second material that emits light of a second color different from the first color, and a third region where a third emissive layer is formed, the third emissive layer that emits light of a third color by stacking the first material and the second material, the third color being different from both of the first color and the second color, a fourth emissive layer composed of a material that emits light of a fourth color different from the first color, the second color, and the third color, the process comprising: (1) feeding the first material to the first region and the third region and to a side adjacent to a first face of at least one first electrode by a gas-phase process with a first mask to form films, the first mask having an opening for forming the first emissive layer and having an opening for forming the third emissive layer; (2) feeding the second material to the second region and the third region such that the second material fed in the third region is stacked above the first material in the third region and to the side adjacent to the first face of each first electrode by a gas-phase process to form the emissive layers while a second mask having an opening for forming the second emissive layer and having an opening for forming the third emissive layer is positioned in such a manner that the position of each film to be the third emissive layer is substantially identical to the position of the opening for forming the third emissive layer; (3) forming a second electrode at a side of each emissive layer opposite the side adjacent to the first electrode; and (4) feeding the material that emits light of the fourth color to the side adjacent to the first face of each first electrode by a gas-phase process with a third mask having an opening for forming the fourth emissive layer.