Abstract: A process for producing an emissive device that includes (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; (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; and (3) forming a second electrode at a side of each emissive layer opposite the side adjacent to the first electrode.

Abstract: A cleaning apparatus of organic substances attached to a vapor-deposition mask for low molecular weight organic EL devices comprises a first stage for treating a vapor-deposition mask with a derivative of pyrrolidone, a second stage for rinsing the vapor-deposition mask with water, and a third stage for rinsing the vapor-deposition mask with flowing water. The cleaning apparatus also comprises a fourth stage for treating the vapor-deposition mask with ethanol, a fifth stage for drying the vapor-deposition mask, and a carrying means that carries the vapor-deposition mask to each stage in sequence. It is desirable to adopt N-methyl-2-pyrrolidone as the derivative of pyrrolidone.

Abstract: A process for producing an emissive device including a first emissive layer composed of a first material that emits light of a first color, a second emissive layer composed of a second material that emits light of a second color different from the first color, and a third emissive layer that emits light of a third color by stacking at least the first material and the second material, the third color being different from both of the first color and the second color, the process includes (1) feeding the first material 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 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 f

Abstract: A cleaning apparatus of organic substances attached to a vapor-deposition mask for low molecular weight organic EL devices comprises a first stage for treating a vapor-deposition mask with a derivative of pyrrolidone, a second stage for rinsing the vapor-deposition mask with water, and a third stage for rinsing the vapor-deposition mask with flowing water. The cleaning apparatus also comprises a fourth stage for treating the vapor-deposition mask with ethanol, a fifth stage for drying the vapor-deposition mask, and a carrying means that carries the vapor-deposition mask to each stage in sequence. It is desirable to adopt N-methyl-2-pyrrolidone as the derivative of pyrrolidone.

Abstract: A cleaning apparatus of organic substances attached to a vapor-deposition mask for low molecular weight organic EL devices comprises a first stage for treating a vapor-deposition mask with a derivative of pyrrolidone, a second stage for rinsing the vapor-deposition mask with water, and a third stage for rinsing the vapor-deposition mask with flowing water. The cleaning apparatus also comprises a fourth stage for treating the vapor-deposition mask with ethanol, a fifth stage for drying the vapor-deposition mask, and a carrying means that carries the vapor-deposition mask to each stage in sequence. It is desirable to adopt N-methyl-2-pyrrolidone as the derivative of pyrrolidone.