NOVELTY - The insulative paste comprises 15-70 wt.% of liquid phase organic insulating material (122) having a viscosity, and 30-85 wt.% of solid particle (124) included in the organic insulating material. The solid particle has a positive curvature with respect to a horizontal plane of the insulating layer, a maximum diameter of 10 nm to 15 mu m, a circular, elliptical or polygonal cross-section shape, and a concave groove on a surface of the particle. The organic insulating material comprises 30-85 wt.% of an organic solvent, and 15-70 wt.% of an insulative polymer material.    USE - The insulative paste is useful for forming an insulating layer, by printing, in an electro-optical device such as organic light emitting device (claimed), LCD, organic-LED, optical sensor and a solar cell.    ADVANTAGE - The insulative paste ensures rapid, easy and economical formation of the insulating layer in the electro-optical device by printing with increased production yield and without any deterioration, and prevents the reflow phenomenon of the viscous liquid component in the insulating layer.    DETAILED DESCRIPTION - The insulative paste comprises 15-70 wt.% of liquid phase organic insulating material (122) having a viscosity, and 30-85 wt.% of solid particle (124) included in the organic insulating material. The solid particle has a positive curvature with respect to a horizontal plane of the insulating layer, a maximum diameter of 10 nm to 15 mu m, a circular, elliptical or polygonal cross-section shape, and a concave groove on a surface of the particle. The organic insulating material comprises 30-85 wt.% of an organic solvent, and 15-70 wt.% of an insulative polymer material. The insulating layer has area dimensions similar to area dimensions of a pattern in which the insulative paste is printed. An INDEPENDENT CLAIM is included for a method for manufacturing an organic light emitting device.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of an insulative paste material.    Insulative organic material (122)    Solid particle. (124)