| 摘要 |
It is an object of the present invention to provide a high-performance and highly reliable light emitting element which has high light emission luminance and luminous efficiency and good adhesiveness inside the element. A feature of the present invention is that the refractive index, internal stress, and dielectric constant are made to change continuously in an insulating layer included in a light emitting element. Since properties of the film are changed continuously in a single layer, this insulating layer has gradations of property values of the film (refractive index, internal stress, dielectric constant, and the like) in the film, and has no interface which is generated in a case of a stacked structure.
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