Semiconductor Device and Manufacturing Method Thereof
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsHideaki KUWABARA, Hideto OHNUMA
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Abstract
As a result of miniaturization of a pixel region associated with an improvement in definition and an increase in a substrate size associated with an increase in area, defects due to precision, bending, and the like of a mask used at the time of evaporation have become issues. A partition including portions with different thicknesses over a pixel electrode (also referred to as a first electrode) in a display region and in the vicinity of a pixel electrode layer is formed, without increasing the number of steps, by using a photomask or a reticle provided with an auxiliary pattern having a light intensity reduction function made of a diffraction grating pattern or a semi-transmissive film.
Claims1
A light emitting device comprising a plurality of light emitting elements over a substrate having an insulating surface,
- wherein the light emitting element includes a first electrode, a partition covering an end portion of the first electrode, a layer containing an organic compound over the first electrode, and a second electrode over the layer containing an organic compound, and
- the partition comprises a protruding portion.
Dependencies are inferred from the claim text.