Lighting device and production method of the same

摘要

Bonding between a light-emitting element and electrodes of a substrate is ensured to enhance reliability of a lighting device. In the lighting device of the present invention, a material made of metal alkoxide or polymetalloxane generated from metal alkoxide is used as a coating material covering the light-emitting element. This may enhance reliability of the bonding between the substrate and the light-emitting element while keeping a high light-emission efficiency. Further, when a liquid material made of metal alkoxide is heat-cured by a sol-gel method, the liquid material changes from a liquid, a sol, a gel, to a solid successively to shrink, thereby generating glass being a solid material. With the use of a shrinking force obtained when the gel changes to the solid in the production method, the bonding between the light-emitting element and the electrodes of the substrate can be performed simultaneously with the curing of the coating material.